A. Goobar

Publication List Details

Period

1989 - 2009

Number

401

Co-Authors

An Intensive Hubble Space Telescope Survey for z > 1 Type Ia Supernovae by Targeting Galaxy Clusters (2009)

Dawson, K. S., Aldering, G., Amanullah, R., Barbary, K., Barrientos, L. F., Brodwin, M., ...

We present a new survey strategy to discover and study high-redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST). By targeting massive galaxy clusters at 0.9 < z < 1.5, we...

Near-IR search for lensed supernovae behind galaxy clusters: I. Observations and transient detection efficiency (2009)

Stanishev, V., Goobar, A., Paech, K., Amanullah, R., Dahlén, T., Jönsson, J., ...

Massive galaxy clusters at intermediate redshift can magnify the flux of distant background sources by several magnitudes and we exploit this effect to search for lensed distant supernovae that may...

An Intensive HST Survey for z>1 Supernovae by Targeting Galaxy Clusters (2009)

Dawson, K. S., Aldering, G., Amanullah, R., Barbary, K., Barrientos, L. F., Brodwin, M., ...

We present a new survey strategy to discover and study high redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST). By targeting massive galaxy clusters at 0.9

Constraining dust and color variations of high-z SNe using NICMOS on Hubble Space Telescope (2009)

Nobili, S., Fadeyev, V., Aldering, G., Amanullah, R., Barbary, K., Burns, M. S., ...

We present data from the Supernova Cosmology Project for five high redshift Type Ia supernovae (SNe Ia) that were obtained using the NICMOS infrared camera on the Hubble Space Telescope. We add two...

Type Ia SNe Along Redshift: The R(Si II) Ratio and the Expansion Velocities in Intermediate-z Supernovae (2009)

Altavilla, G., Ruiz-Lapuente, P., Balastegui, A., Méndez, J., Irwin, M., España-Bonet, C., ...

We present a study of intermediate-z Type Ia supernovae (SNe Ia) using empirical physical diagrams which permit the investigation of those SNe explosions. This information can be very useful to...

Characterizing the Properties of Clusters of Galaxies as a Function of Luminosity and Redshift (2009)

Andersson, K., Peterson, J. R., Madejski, G., Goobar, A.

We report the application of a new Monte Carlo method, Smoothed Particle Inference (SPI, described in a pair of companion papers), towards analysis and interpretation of X-ray observations of...

Near-IR Search for Lensed Supernovae Behind Galaxy Clusters - II. First Detection and Future Prospects (2008)

Goobar, A., Paech, K., Stanishev, V., Amanullah, R., Dahlen, T., Jonsson, J., ...

Powerful gravitational telescopes in the form of massive galaxy clusters can be used to enhance the light collecting power over a limited field of view by about an order of magnitude in flux. This...

Improved Cosmological Constraints from New, Old, and Combined Supernova Data Sets (2008)

Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...

We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...

Discovery of an Unusual Optical Transient with the Hubble Space Telescope (2008)

Barbary, K., Dawson, K. S., Tokita, K., Aldering, G., Amanullah, R., Connolly, N. V., ...

We present observations of SCP 06F6, an unusual optical transient discovered during the Hubble Space Telescope Cluster Supernova Survey. The transient brightened over a period of ~100 days, reached a...

Light curves of five type Ia supernovae at intermediate redshift (2008)

Amanullah, R., Stanishev, V., Goobar, A., Schahmaneche, K., Astier, P., Balland, C., ...

Aims. We present multi-band light curves and distances for five type Ia supernovae at intermediate redshifts, 0.18 < z < 0.27. Methods. Three telescopes on the Canary Island of La Palma, INT, NOT,...

Looking Beyond Lambda with the Union Supernova Compilation (2008)

Rubin, D., Linder, E. V., Kowalski, M., Aldering, G., Amanullah, R., Barbary, K., ...

The recent robust and homogeneous analysis of the world's supernova distance-redshift data, together with cosmic microwave background and baryon acoustic oscillation data, provides a powerful tool...

Improved Cosmological Constraints from New, Old and Combined Supernova Datasets (2008)

Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...

We present a new compilation of Type Ia supernovae (SNe Ia), a new dataset of low-redshift nearby-Hubble-flow SNe and new analysis procedures to work with these heterogeneous compilations. This...

Measurement of Ωm, ΩΛ from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe (2008)

A. Conley, G. Goldhaber, L. Wang, G. Aldering, R. Amanullah, E. D. Commins, ...

We present measurements of Ωm and ΩΛ from a blind analysis of 21 high redshift supernovae using a new technique (CMAGIC) for fitting the multicolor lightcurves of Type Ia supernovae, first...

Improved cosmological constraints from new, old, and combined supernova data sets (2008)

Kowalski, M., Rubin, D., Aldering, G., Agostinho, R. J., Amadon, A., Amanullah, R., ...

We present a new compilation of Type Ia supernovae (SNe Ia), a new data set of low-redshift nearby-Hubble-flow SNe, and new analysis procedures to work with these heterogeneous compilations. This...

A Supernova at (2007)

And Implications, S. Perlmutter, C. R. Pennypacker, G. Goldhaber, A. Goobar, R. A. Muller, ...

We have begun a program to discover high-redshift supernovae (z ß 0.25--0.5), and study them with follow-up photometry and spectroscopy. We report here our first discovery, a supernova at z = 0:458....

AND (2007)

R. Pain, I. M. Hook, S. Perlmutter, S. Deustua, S. Gabi, G. Goldhaber, ...

Abstract. We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived using a large subset of data from the Supernova Cosmology Project as described in...

1 (2007)

R. Pain, I. M. Hook, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, ...

, R. S. Ellis 7, R. G. McMahon 7, K. Glazebrook

Royal Greenwich Observatory (2007)

A. Kim, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, I. Hook, ...

Cross-filter K corrections for a sample of &quot;normal &quot; Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical...

Royal Greenwich Observatory (2007)

S. Deustua, S. Gabi, D. Groom, I. Hook, A. Kim, M. Kim, ...

Abstract. This work is based on the first results from a systematic search for high redshift Type Ia supernovae. Using filters in the R-band we discovered seven such SNe, with redshift z = 0:3 \Gamma...

Royal Greenwich Observatory (2007)

S. Perlmutter, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, I. Hook, ...

Our search for high-redshift Type Ia supernovae discovered, in its first years, a sample of seven supernovae. Using a &quot;batch &quot; search strategy, almost all were discovered before...

Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications (2007)

S. Perlmutter, G. Aldering, M. Della Valle, S. Deustua, R. S. Ellis, S. Fabbro, ...

, Munich, Germany 11 L.P.C.C. Coll`ege de France, Paris, France 12 European Southern Observatory, La Silla, Chile 13 Space Telescope Science Institute, Baltimore, Maryland, USA; affiliated with the...

Light curves of five type Ia supernovae at intermediate redshift (2007)

Amanullah, R., Stanishev, V., Goobar, A., Schahmaneche, K., Astier, P., Balland, C., ...

We present multi-band light curves and distances for five type Ia supernovae at intermediate redshifts, 0.18

A New Determination of the High Redshift Type Ia Supernova Rates with the Hubble Space Telescope Advanced Camera for Surveys (2007)

Kuznetsova, N., Barbary, K., Connolly, B., Kim, A. G., Pain, R., Roe, N. A., ...

We present a new measurement of the volumetric rate of Type Ia supernova up to a redshift of 1.7, using the Hubble Space Telescope (HST) GOODS data combined with an additional HST dataset covering...

The early spectral evolution of SN 2004dt (2007)

Altavilla, G., Stehle, M., Ruiz-Lapuente, P., Mazzali, P., Pignata, G., Balastegui, A., ...

Aims. We study the optical spectroscopic properties of Type Ia Supernova (SN Ia) 2004dt, focusing our attention on the early epochs. Methods. Observation triggered soon after the SN 2004dt discovery...

The Sloan Digital Sky Survey-II Supernova Survey: Technical Summary (2007)

Frieman, Joshua A., Bassett, B., Becker, A., Choi, C., Cinabro, D., DeJongh, F., ...

The Sloan Digital Sky Survey-II (SDSS-II) has embarked on a multi-year project to identify and measure light curves for intermediate-redshift (0.05 < z < 0.35) Type Ia supernovae (SNe Ia) using...

ESC observations of SN 2005cf: II. Optical Spectroscopy and the high velocity features (2007)

Garavini, G., Nobili, S., Taubenberger, S., Pastorello, A., Elias-Rosa, N., Stanishev, V., ...

The ESC-RTN optical spectroscopy data-set for SN 2005cf is presented and analyzed. The observations range from -11.6 and +77.3 days with respect to B-band maximum light. The evolution of the spectral...

Spectroscopic observations of eight supernovae at intermediate redshift (2007)

Balland, C., Mouchet, M., Amanullah, R., Astier, P., Fabbro, S., Folatelli, G., ...

We present spectra of six Type Ia and two Type II supernovae obtained in June 2002 at the William Herschel Telescope during a search for Type Ia supernovae (SNIa) at intermediate redshift. Supernova...

Spectroscopic observations of eight supernovae at intermediate redshift (2007)

Balland, C., Mouchet, M., Amanullah, R., Astier, P., Fabbro, S., Folatelli, G., ...

We present spectra of six Type Ia and two Type II supernovae obtained in June 2002 at the William Herschel Telescope during a search for Type Ia supernovae (SNIa) at intermediate redshift. Supernova...

Spectroscopic observations of eight supernovae at intermediate redshift (2007)

Balland, C., Mouchet, M., Amanullah, R., Astier, P., Fabbro, S., Folatelli, G., ...

We present spectra of six Type Ia and two Type II supernovae obtained in June 2002 at the William Herschel Telescope during a search for Type Ia supernovae (SNIa) at intermediate redshift. Supernova...

The Supernova Legacy Survey: Measurement of $\Omega_M$, $\Omega_\Lambda$ and w from the First Year Data Set (2007)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

The Supernova Legacy Survey: Measurement of $\Omega_M$, $\Omega_\Lambda$ and w from the First Year Data Set (2007)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

The Supernova Legacy Survey: Measurement of $\Omega_M$, $\Omega_\Lambda$ and w from the First Year Data Set (2007)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study (2007)

Garavini, G., Folatelli, G., Nobili, S., Aldering, G., Amanullah, R., Antilogus, P., ...

We develop a method to measure the strength of the absorption features in Type Ia supernova (SN Ia) spectra and use it to make a quantitative comparison between the spectra of Type Ia supernovae at...

SN 2003du: 480 days in the Life of a Normal Type Ia Supernova (2007)

Stanishev, V., Goobar, A., Benetti, S., Kotak, R., Pignata, G., Navasardyan, H., ...

An extensive set of optical and NIR photometry and low-resolution spectra the Type Ia supernova (SN Ia) 2003du was obtained using a number of facilities. The observations started 13 days before...

Spectroscopic observations of eight supernovae at intermediate redshift (2007)

Balland, C., Mouchet, M., Amanullah, R., Astier, P., Fabbro, S., Folatelli, G., ...

We present spectra of six Type Ia and two Type II supernovae obtained in June 2002 at the William Herschel Telescope during a search for Type Ia supernovae (SNIa) at intermediate redshift. Supernova...

Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study (2007)

Garavini, G., Folatelli, G., Nobili, S., Aldering, G., Amanullah, R., Antilogus, P., ...

We develop a method to measure the strength of the absorption features in Type Ia supernova (SN Ia) spectra and use it to make a quantitative comparison between the spectra of Type Ia supernovae at...

ESC observations of SN 2005cf. I. Photometric Evolution of a Normal Type Ia Supernova (2007)

Pastorello, A., Taubenberger, S., Elias-Rosa, N., Mazzali, P. A., Pignata, G., Cappellaro, E., ...

We present early-time optical and near-infrared photometry of supernova (SN) 2005cf. The observations, spanning a period from about 12 days before to 3 months after maximum, have been obtained...

ESC observations of SN 2005cf: II. Optical Spectroscopy and the high velocity features (2007)

Garavini, G., Nobili, S., Taubenberger, S., Pastorello, A., Stanishev, V., ...

The ESC-RTN optical spectroscopy data-set for SN 2005cf is presented and analyzed. The observations range from -11.6 and +77.3 days with respect to B-band maximum light. The evolution of the spectral...

Scheduled Discoveries of 7+ High-Redshift Supernovae: First Cosmology Results and Bounds on $q_0$ (2007)

Perlmutter, S., Deustua, S., Gabi, S., Goldhaber, G., Groom, D., Hook, I., ...

Our search for high-redshift Type Ia supernovae discovered, in its first years, a sample of seven supernovae. Using a "batch" search strategy, almost all were discovered before maximum light and were...

The Type Ia Supernova Rate at z $\sim$ 0.4 (2007)

Pain, R., Hook, I., Perlmutter, S., Deustua, S., Gabi, S., Goldhaber, G., ...

We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived using a large subset of data from the Supernova Cosmology Project as described in more...

Observation of Cosmological Time Dilation using Type Ia Supernovae as Clocks (2007)

Goldhaber, G., Deustua, S., Gabi, S., Groom, D., Hook, I., Kim, A., ...

This work is based on the first results from a systematic search for high redshift Type Ia supernovae. Using filters in the R-band we discovered seven such SNe, with redshift z = 0.3 - 0.5, before or...

K Corrections For Type Ia Supernovae and a Test for Spatial Variation of the Hubble Constant (2007)

Kim, A., Deustua, S., Gabi, S., Goldhaber, G., Groom, D., Hook, I., ...

Cross-filter K corrections for a sample of "normal" Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical and systematic K...

Measurement of $\Omega_m$, $\Omega_{\Lambda}$ from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe (2007)

Conley, A., Goldhaber, G., Wang, L., Aldering, G., Amanullah, R., Commins, E. D., ...

We present measurements of \Omega_m and \Omega_{\Lambda} from a blind analysis of 21 high-redshift supernovae using a new technique (CMAGIC) for fitting the multi-color lightcurves of Type Ia...

Type Ia SNe along redshift: the $\cal{R}$(Si II) ratio and the expansion velocities in intermediate z supernovae (2007)

Altavilla, G., Ruiz-Lapuente, P., Balastegui, A., Mendez, J., Irwin, M., Espana-Bonet, C., ...

We study intermediate--z SNe Ia using the empirical physical diagrams which enable to learn about those SNe explosions. This information can be very useful to reduce systematic uncertainties of the...

New Constraints on $\Omega_M$, $\Omega_\Lambda$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST (2007)

Knop, R. A., Aldering, G., Amanullah, R., Astier, P., Blanc, G., Burns, M. S., ...

We report measurements of $\Omega_M$, $\Omega_\Lambda$, and w from eleven supernovae at z=0.36-0.86 with high-quality lightcurves measured using WFPC-2 on the HST. This is an independent set of...

The distant Type Ia supernova rate (2007)

Pain, R., Fabbro, S., Sullivan, M., Ellis, R. S., Aldering, G., Astier, P., ...

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12...

The Hubble Diagram of Type Ia Supernovae as a Function of Host Galaxy Morphology (2007)

Sullivan, M., Ellis, R. S., Aldering, G., Amanullah, R., Astier, P., Blanc, G., ...

(Abridged) We present new results on the Hubble diagram of distant type Ia supernovae (SNe Ia) segregated according to the type of host galaxy. This makes it possible to check earlier evidence for a...

Supernovae and the Nature of the Dark Energy (2007)

Goliath, M., Amanullah, R., Astier, P., Goobar, A., Pain, R.

The use of Type Ia supernovae as calibrated standard candles is one of the most powerful tools to study the expansion history of the universe and thereby its energy components. While the analysis of...

Timescale Stretch Parameterization of Type Ia Supernova B-band Light Curves (2007)

Goldhaber, G., Groom, D. E., Kim, A., Aldering, G., Astier, P., Conley, A., ...

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Supernova Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the...

Cosmology from Type Ia Supernovae (2007)

Perlmutter, S., Aldering, G., Deustua, S., Fabbro, S., Goldhaber, G., Groom, D. E., ...

This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redshift supernovae. The...

Measurements of Omega and Lambda from 42 High-Redshift Supernovae (2007)

Perlmutter, S., Aldering, G., Goldhaber, G., Knop, R. A., Nugent, P., Castro, P. G., ...

We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discovered by the Supernova...

Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications (2007)

Perlmutter, S., Aldering, G., Della Valle, M., Deustua, S., Ellis, R. S., Fabbro, S., ...

The ultimate fate of the universe, infinite expansion or a big crunch, can be determined by measuring the redshifts, apparent brightnesses, and intrinsic luminosities of very distant supernovae....

Measurements of the Cosmological Parameters $\Omega$ and $\Lambda$ from the First 7 Supernovae at $z \geq$ 0.35 (2007)

Perlmutter, S., Gabi, S., Goldhaber, G., Groom, D. E., Hook, I. M., Kim, A. G., ...

We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven...

Implications For The Hubble Constant from the First Seven Supernovae at $z \geq$ 0.35 (2007)

Kim, A.G., Gabi, S., Goldhaber, G., Groom, D. E., Hook, I. M., Kim, M. Y., ...

The Supernova Cosmology Project has discovered over twenty-eight supernovae (SNe) at 0.35

The Type Ia Supernova Rate at z$\sim 0.4 $ (2007)

Pain, R., Hook, I. M., Deustua, S., Gabi, S., Goldhaber, G., Goobar, A., ...

We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived using a large subset of data from the Supernova Cosmology Project. Three supernovae were...

Testing the DGP model with ESSENCE (2007)

Rydbeck, S, Fairbairn, M, Goobar, A

We use the recent supernova data set from the ESSENCE collaboration combined with data from the Supernova Legacy Survey and nearby supernovae to test the DGP brane world model and its...

Type Ia supernova rate at a redshift of ~ 0.1 (2006)

Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

Type Ia supernova rate at a redshift of ~ 0.1 (2006)

Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

Type Ia supernova rate at a redshift of ~ 0.1 (2006)

Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z $\sim$ 0.5 (2006)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2006)

Lidman, C., A. Howell, D., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2006)

Lidman, C., A. Howell, D., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z $\sim$ 0.5 (2006)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2006)

Lidman, C., A. Howell, D., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z $\sim$ 0.5 (2006)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

The Peculiar Type Ia Supernova 2005hk (2006)

Stanishev, V., Taubenberger, S., Blanc, G., Anupama, G. C., Benetti, S., Cappellaro, E., ...

We present a preliminary analysis of an extensive set of optical observations of the Type Ia SN 2005hk. We show that the evolution of SN 2005hk closely follows that of the peculiar SN 2002cx. SN...

Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy (2006)

Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...

The Supernova / Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe's expansion by...

Type Ia SNe along redshift: the R(Si II) ratio and the expansion velocities in intermediate z supernovae (2006)

Altavilla, G., Ruiz-Lapuente, P., Balastegui, A., Mendez, J., Irwin, M., Espana-Bonet, C., ...

We study intermediate--z SNe Ia using the empirical physical diagrams which enable to learn about those SNe explosions. This information can be very useful to reduce systematic uncertainties of the...

An Integral Field Spectrograph for SNAP Supernova Identification (2006)

Ealet, A., Prieto, E., Bonissent, A., Malina, R., Bernstein, G.M., Basa, S., ...

A well-adapted spectrograph concept has been developed for the SNAP (SuperNova/Acceleration Probe) experiment. The goal is to ensure proper identification of Type Ia supernovae and to standardize the...

SN 2004aw: Confirming Diversity of Type Ic Supernovae (2006)

Taubenberger, S., Pastorello, A., Mazzali, P. A., Valenti, S., Pignata, G., Sauer, D. N., ...

Optical and near-infrared observations of the Type Ic supernova (SN) 2004aw are presented, obtained from day -3 to day +413 with respect to the B-band maximum. The photometric evolution is...

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa (2006)

Garavini, G., Folatelli, G., Goobar, A., Nobili, S., Aldering, G., Amadon, A., ...

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum...

Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac (2006)

Garavini, G., Aldering, G., Amadon, A., Amanullah, R., Astier, P., Balland, C., ...

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several...

Measurement of \Omega_m, \Omega_{\Lambda} from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe (2006)

Conley, A., Goldhaber, G., Wang, L., Aldering, G., Amanullah, R., Commins, E. D., ...

We present measurements of \Omega_m and \Omega_{\Lambda} from a blind analysis of 21 high-redshift supernovae using a new technique (CMAGIC) for fitting the multi-color lightcurves of Type Ia...

Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts (2006)

Hook, I. M., Howell, D. A., Aldering, G., Amanullah, R., Burns, M. S., Conley, A., ...

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra...

Spectroscopy of twelve Type Ia supernovae at intermediate redshift (2006)

Balland, C., Mouchet, M., Pain, R., A. Walton, N., Amanullah, R., Astier, P., ...

We present spectra of twelve Type Ia supernovae obtained in 1999 at the William Herschel Telescope and the Nordic Optical Telescope during a search for Type Ia supernovae (SN Ia) at intermediate...

The Supernova Legacy Survey: Measurement of $\Omega_M$, $\Omega_\Lambda$ and w from the First Year Data Set (2006)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

Spectroscopy of twelve Type Ia supernovae at intermediate redshift (2006)

Balland, C., Mouchet, M., Pain, R., A. Walton, N., Amanullah, R., Astier, P., ...

We present spectra of twelve Type Ia supernovae obtained in 1999 at the William Herschel Telescope and the Nordic Optical Telescope during a search for Type Ia supernovae (SN Ia) at intermediate...

The Supernova Legacy Survey: Measurement of $\Omega_M$, $\Omega_\Lambda$ and w from the First Year Data Set (2006)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

Spectroscopy of twelve Type Ia supernovae at intermediate redshift (2006)

Balland, C., Mouchet, M., Pain, R., A. Walton, N., Amanullah, R., Astier, P., ...

We present spectra of twelve Type Ia supernovae obtained in 1999 at the William Herschel Telescope and the Nordic Optical Telescope during a search for Type Ia supernovae (SN Ia) at intermediate...

The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set (2005)

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...

We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color...

Supernova Acceleration Probe: Studying Dark Energy with Type Ia Supernovae (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

The Supernova Acceleration Probe (SNAP) will use Type Ia supernovae (SNe Ia) as distance indicators to measure the effect of dark energy on the expansion history of the Universe. (SNAP's weak-lensing...

Probing Dark Energy via Weak Gravitational Lensing with the SuperNova Acceleration Probe (SNAP) (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

SNAP is a candidate for the Joint Dark Energy Mission (JDEM) that seeks to place constraints on the dark energy using two distinct methods. The first, Type Ia SN, is discussed in a companion white...

Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)

Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...

For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...

Looking at quasars through galaxies (2005)

Ostman, L., Goobar, A., Mortsell, E.

Observations of quasars (QSOs) shining through or close to galaxies offer a way to probe the properties of the foreground matter through dust extinction and gravitational lensing. In this paper the...

Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts (2005)

Hook, I. M., Howell, D. A., Aldering, G., Amanullah, R., Burns, M. S., Conley, A., ...

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra...

Spectroscopy of twelve Type Ia supernovae at intermediate redshift (2005)

Balland, C., Mouchet, M., Pain, R., Walton, N. A., Amanullah, R., Astier, P., ...

We present spectra of twelve Type Ia supernovae obtained in 1999 at the William Herschel Telescope and the Nordic Optical Telescope during a search for Type Ia supernovae (SN Ia) at intermediate...

High-Velocity Features: A Ubiquitous Property of Type Ia Supernovae (2005)

A. Mazzali, P., Benetti, S., Altavilla, G., Blanc, G., Cappellaro, E., Elias-Rosa, N., ...

Evidence of high-velocity features (HVFs) such as those seen in the near-maximum spectra of some Type Ia supernovae (SNe Ia; e.g., SN 2000cx) has been searched for in the available SN Ia spectra...

Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac (2005)

Aldering, G., Amadon, A., Amanullah, R., Astier, P., Balland, C., ...

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several...

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z ~0.5 (2005)

Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z ~; 0.5 (2005)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

High-Velocity Features: a ubiquitous property of Type Ia SNe (2005)

Mazzali, P. A., Benetti, S., Altavilla, G., Blanc, G., Cappellaro, E., Elias-Rosa, N., ...

Evidence of high-velocity features such as those seen in the near-maximum spectra of some Type Ia Supernovae (eg SN 2000cx) has been searched for in the available SNIa spectra observed earlier than...

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa (2005)

Garavini, G., Folatelli, G., Goobar, A., Nobili, S., Aldering, G., Amadon, A., ...

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum...

Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts (2005)

Hook, I. M., Howell, D. A., Aldering, G., Amanullah, R., Burns, M. S., Conley, A., ...

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra...

Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac (2005)

Garavini, G., Aldering, G., Amadon, A., Amanullah, R., Astier, P., Balland, C., ...

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several...

Supernova Acceleration Probe: Studying Dark Energy with Type Ia Supernovae (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

The Supernova Acceleration Probe (SNAP) will use Type Ia supernovae (SNe Ia) as distance indicators to measure the effect of dark energy on the expansion history of the Universe. (SNAP's weak-lensing...

Probing Dark Energy via Weak Gravitational Lensing with the SuperNova Acceleration Probe (SNAP) (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

SNAP is a candidate for the Joint Dark Energy Mission (JDEM) that seeks to place constraints on the dark energy using two distinct methods. The first, Type Ia SN, is discussed in a companion white...

Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)

Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...

For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...

High-Velocity Features: A Ubiquitous Property of Type Ia Supernovae (2005)

A. Mazzali, P., Benetti, S., Altavilla, G., Blanc, G., Cappellaro, E., Elias-Rosa, N., ...

Evidence of high-velocity features (HVFs) such as those seen in the near-maximum spectra of some Type Ia supernovae (SNe Ia; e.g., SN 2000cx) has been searched for in the available SN Ia spectra...

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z $\sim$ 0.5 (2005)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2005)

Lidman, C., A. Howell, D., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa (2005)

Garavini, G., Folatelli, G., Goobar, A., Nobili, S., Aldering, G., Amadon, A., ...

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum...

Spectra of High-Redshift Type Ia Supernovae and a Comparison with their Low-Redshift Counterparts (2005)

Hook, I. M., Howell, D. A., Aldering, G., Amanullah, R., Burns, M. S., Conley, A., ...

We present spectra for 14 high-redshift (0.17 < z < 0.83) supernovae, which were discovered by the Supernova Cosmology Project as part of a campaign to measure cosmological parameters. The spectra...

Spectroscopic Observations and Analysis of the Unusual Type Ia SN 1999ac (2005)

Garavini, G., Aldering, G., Amadon, A., Amanullah, R., Astier, P., Balland, C., ...

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several...

Supernova Acceleration Probe: Studying Dark Energy with Type Ia Supernovae (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

The Supernova Acceleration Probe (SNAP) will use Type Ia supernovae (SNe Ia) as distance indicators to measure the effect of dark energy on the expansion history of the Universe. (SNAP's weak-lensing...

Probing Dark Energy via Weak Gravitational Lensing with the SuperNova Acceleration Probe (SNAP) (2005)

Albert, J., Aldering, G., Allam, S., Althouse, W., Amanullah, R., Annis, J., ...

SNAP is a candidate for the Joint Dark Energy Mission (JDEM) that seeks to place constraints on the dark energy using two distinct methods. The first, Type Ia SN, is discussed in a companion white...

Seeing the Nature of the Accelerating Physics: It's a SNAP (2005)

Aldering, G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...

For true insight into the nature of dark energy, measurements of the precision and accuracy of the Supernova/Acceleration Probe (SNAP) are required. Precursor or scaled-down experiments are...

High-Velocity Features: A Ubiquitous Property of Type Ia Supernovae (2005)

A. Mazzali, P., Benetti, S., Altavilla, G., Blanc, G., Cappellaro, E., Elias-Rosa, N., ...

Evidence of high-velocity features (HVFs) such as those seen in the near-maximum spectra of some Type Ia supernovae (SNe Ia; e.g., SN 2000cx) has been searched for in the available SN Ia spectra...

Restframe I-band Hubble diagram for type Ia supernovae up to redshift z $\sim$ 0.5 (2005)

Nobili, S., Amanullah, R., Garavini, G., Goobar, A., Lidman, C., Stanishev, V., ...

We present a novel technique for fitting restframe I-band light curves on a data set of 42 Type Ia supernovae (SNe Ia). Using the result of the fit, we construct a Hubble diagram with 26 SNe from the...

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2005)

Lidman, C., A. Howell, D., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Spectroscopic observations and analysis of the unusual type Ia SN 1999ac (2005)

Garavini, G., Aldering, G., Amadon, A., Amanullah, R., Astier, P., Balland, C., ...

We present optical spectra of the peculiar Type Ia supernova (SN Ia) 1999ac. The data extend from -15 to +42 days with respect to B-band maximum and reveal an event that is unusual in several...

Spectroscopic confirmation of high-redshift supernovae with the ESO VLT (2004)

Lidman, C., Howell, D. A., Folatelli, G., Garavini, G., Nobili, S., Aldering, G., ...

We present VLT FORS1 and FORS2 spectra of 39 candidate high-redshift supernovae that were discovered as part of a cosmological study using Type Ia supernovae (SNe Ia) over a wide range of redshifts....

Supernova / Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy (2004)

Aldering, SNAP Collaboration: G., Althouse, W., Amanullah, R., Annis, J., Astier, P., Baltay, C., ...

The Supernova / Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universe's expansion by...

Type Ia supernova rate at a redshift of ~ 0.1 (2004)

Blanc, G., Afonso, C., Alard, C., Albert, J. N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

No evidence for Dark Energy Metamorphosis ? (2004)

Jonsson, J., Goobar, A., Amanullah, R., Bergstrom, L.

Recent attempts to fit Type Ia supernova data by modeling the dark energy density as a truncated Taylor series have suggested the possibility of metamorphosis, i.e., a rapidly evolving equation of...

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa (2004)

Garavini, G., Folatelli, G., Goobar, A., Nobili, S., Aldering, G., Amadon, A., ...

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum...

Type Ia supernova rate at a redshift of ~ 0.1 (2004)

Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

Type Ia supernova rate at a redshift of ~ 0.1 (2004)

Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...

We present the type Ia rate measurement based on two EROS supernova search campaigns (in 1999 and 2000). Sixteen supernovae identified as type Ia were discovered. The measurement of the detection...

Astronomy Astrophysics (2004)

C. Lidman, D. A. Howell, G. Folatelli, G. Garavini, S. Nobili, G. Aldering, ...

c ○ ESO 2005 Spectroscopic confirmation of high-redshift supernovae with the ESO VLT ⋆,⋆⋆

Spectroscopic Observations and Analysis of the Peculiar SN 1999aa (2004)

G. Garavini, G. Folatelli, A. Goobar, S. Nobili, G. Aldering, A. Amadon, ...

We present an extensive new time-series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between−11 and+58 days with respect to B-band maximum...

Spectroscopic observations and analysis of the peculiar SN 1999aa (2003)

Garavini, G., Folatelli, G., Goobar, A., Nobili, S., Aldering, G., Amadon, A., ...

We present an extensive new time series of spectroscopic data of the peculiar SN 1999aa in NGC 2595. Our data set includes 25 optical spectra between -11 and +58 days with respect to B-band maximum...

Supernova 2002bo: inadequacy of the single parameter description (2003)

Benetti, S., Meikle, P., Stehle, M., Altavilla, G., Desidera, S., Folatelli, G., ...

We present optical/near-infrared photometry and spectra of the type Ia SN 2002bo spanning epochs from -13 days before maximum B-band light to +102 days after. The pre-maximum optical coverage is...

New Constraints on $\Omega_M$, $\Omega_\Lambda$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST (2003)

Knop, R. A., Aldering, G., Amanullah, R., Astier, P., Blanc, G., Burns, M. S., ...

We report measurements of $\Omega_M$, $\Omega_\Lambda$, and w from eleven supernovae at z=0.36-0.86 with high-quality lightcurves measured using WFPC-2 on the HST. This is an independent set of...

SNAP Satellite Focal Plane Development (2003)

Bebek, C., Akerlof, C., Aldering, G., Amanullah, R., Astier, P., Baltay, C., ...

The proposed SuperNova/Acceleration Probe (SNAP) mission will have a two-meter class telescope delivering diffraction-limited images to an instrumented 0.7 square degree field in the visible and...

The intrinsic colour dispersion in Type Ia supernovae (2003)

Nobili, S., Goobar, A., Knop, R., Nugent, P.

The properties of low-redshift Type Ia supernovae are investigated using published multi-band optical broadband data from the Calan/Tololo and CfA surveys. The average time evolution of B-V, V-R,...

The Hubble Diagram of Type Ia Supernovae as a Function of Host Galaxy Morphology (2002)

Sullivan, M., Ellis, R. S., Aldering, G., Amanullah, R., Astier, P., Blanc, G., ...

(Abridged) We present new results on the Hubble diagram of distant type Ia supernovae (SNe Ia) segregated according to the type of host galaxy. This makes it possible to check earlier evidence for a...

The Type Ia Supernova 1999aw: a Probable 1999aa-like Event In a Low-Luminosity Host Galaxy (2002)

Smith, R. C., Suntzeff, N. B., Phillips, M. M., Aldering, G., Nugent, P., ...

SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search (NGSS) project. This luminous, slow-declining (Delta m_{15} (B) = 0.81 \pm 0.03) Type Ia supernova was...

Cosmological parameters from lensed supernovae (2002)

Goobar, A., Mortsell, E., Amanullah, R., Nugent, P.

We investigate the possibility of measuring the Hubble constant, the fractional energy density components and the equation of state parameter of the ``dark energy'' using lensed multiple images of...

SNOC: a Monte-Carlo simulation package for high-z supernova observations (2002)

Goobar, A., Mortsell, E., Amanullah, R., Goliath, M., Bergstrom, L., Dahlen, T.

We present a Monte-Carlo package for simulation of high-redshift supernova data, SNOC. Optical and near-infrared photons from supernovae are ray-traced over cosmological distances from the simulated...

The distant Type Ia supernova rate (2002)

Pain, R., Fabbro, S., Sullivan, M., Ellis, R. S., Aldering, G., Astier, P., ...

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12...

Correcting for lensing bias in the Hubble diagram (2002)

Amanullah, R., Mortsell, E., Goobar, A.

Gravitational lensing will cause a dispersion in the Hubble diagram for high redshift sources. This effect will introduce a bias in the cosmological parameter determination using the...

The distant Type Ia supernova rate (2002)

R. Pain, S. Fabbro, M. Sullivan, R. S. Ellis, G. Aldering, P. Astier, ...

LPNHE, CNRS-IN2P3 and Universites Paris VI & VII, Paris, France Now at IST, Lisbon, Portugal Department of Physics, Durham University, United Kingdom Institute of Astronomy, Cambridge University,...

Accepted for publication in The Astrophysical Journal LPNHE 02-02 The distant Type Ia supernova rate (2002)

R. Pain, S. Fabbro, M. Sullivan, R. S. Ellis, G. Aldering, P. Astier, ...

We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12...

The Type Ia supernova 1999aw: a probable 1999aa-like event in a low-luminosity host galaxy (2002)

Strolger, L. G., Smith, R. C., Suntzeff, N. B., Phillips, M. M., Aldering, G., Nugent, P., ...

SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search project. This luminous, slow-declining [Δm 15(B) = 0.81±0.03] Type Ia supernova was noteworthy in...

The Type Ia supernova 1999aw: a probable 1999aa-like event in a low-luminosity host galaxy (2002)

Strolger, L. G., Smith, R. C., Suntzeff, N. B., Phillips, M. M., Aldering, G., Nugent, P., ...

SN 1999aw was discovered during the first campaign of the Nearby Galaxies Supernova Search project. This luminous, slow-declining [Δm 15(B) = 0.81±0.03] Type Ia supernova was noteworthy in at least...

Timescale Stretch Parameterization of Type Ia Supernova B-band Light Curves (2001)

Goldhaber, G., Groom, D. E., Kim, A., Aldering, G., Astier, P., Conley, A., ...

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Supernova Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the...

Supernovae and the Nature of the Dark Energy (2001)

Goliath, M., Amanullah, R., Astier, P., Goobar, A., Pain, R.

The use of Type Ia supernovae as calibrated standard candles is one of the most powerful tools to study the expansion history of the universe and thereby its energy components. While the analysis of...

Timescale stretch parameterization of Type Ia supernova B-band light curves (2001)

Goldhaber, G., Groom, D.E., Kim, A., Aldering, G., Astier, P., Conley, A., ...

R-band intensity measurements along the light curve of Type Ia supernovae discovered by the Cosmology Project (SCP) are fitted in brightness to templates allowing a free parameter the time-axis width...

Determining the fraction of compact objects in the Universe using supernova observations (2001)

Moertsell, E., Goobar, A., Bergstrom, L.

We investigate the possibility to determine the fraction of compact objects in the Universe by studying gravitational lensing effects on Type Ia supernova observations. Using simulated data sets from...

Measurements Of Omega and Lambda from 42 High-Redshift Supernovae (1999)

G. Aldering, G. Goldhaber, R.A. Knop, P. Nugent, P. G. Castro, ...

We report measurements of the mass density,\Omega M , and cosmological-constant energy density,\Omega , of the universe based on the analysis of 42 Type Ia supernovae discovered by the Supernova...

Cosmology from Type Ia Supernovae (1998)

Perlmutter, S., Aldering, G., Deustua, S., Fabbro, S., Goldhaber, G., Groom, D. E., ...

This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redshift supernovae. The...

Measurements of Omega and Lambda from 42 High-Redshift Supernovae (1998)

Perlmutter, S., Aldering, G., Goldhaber, G., Knop, R. A., Nugent, P., Castro, P. G., ...

We report measurements of the mass density, Omega_M, and cosmological-constant energy density, Omega_Lambda, of the universe based on the analysis of 42 Type Ia supernovae discovered by the Supernova...

Cosmology from Type Ia Supernovae (1998)

Perlmutter, S., Aldering, G., Deustua, S., Goldhaber, G., Groom, D.E., Kim, A.G., ...

This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redshift supernovae. The...

The AMANDA Neutrino Telescope and the Indirect Search for Dark Matter (1998)

Francis Halzen For, R. C. Bay, Y. He, D. Lowder, P. Miocinovic, ...

With an effective telescope area of order 10 4 m 2 , a threshold of 50 GeV and a pointing accuracy of 2.5 degrees, the AMANDA detector represents the first of a new generation of high energy neutrino...

Discovery of a Supernova Explosion at Half the Age of the Universe&quot;, Nature 391 (1998)

S. Perlmutter, G. Aldering, M. Della, Valle S. Deustua, R. S. Ellis, S. Fabbro, ...

The ultimate fate of the universe � in�nite expansion or a big crunch � can be determined by measuring the redshifts � apparent brightnesses � and intrinsic luminosities of very distant...

Discovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications (1997)

Perlmutter, S., Aldering, G., Della Valle, M., Deustua, S., Ellis, R. S., Fabbro, S., ...

The ultimate fate of the universe, infinite expansion or a big crunch, can be determined by measuring the redshifts, apparent brightnesses, and intrinsic luminosities of very distant supernovae....

Implications For The Hubble Constant from the First Seven Supernovae at z >= 0.35 (1997)

Gabi, S., Goldhaber, G., Groom, D. E., Hook, I. M., Kim, M. Y., ...

The Supernova Cosmology Project has discovered over twenty-eight supernovae (SNe) at 0.35

Measurements of the Cosmological Parameters \Omega and \Lambda from the First 7 Supernovae at ... (1997)

S. Perlmutter, S. Gabi, G. Goldhaber, A. Goobar, D. E. Groom, I. M. Hook, ...

We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven...

Observation Of Cosmological Time Dilation Using Type Ia Supernovae As Clocks (1997)

G.GOLDHABER, S. Deustua, S. Gabi, D. Groom, I. Hook, M. KIM, ...

. This work is based on the first results from a systematic search for high redshift Type Ia supernovae. Using filters in the R-band we discovered seven such SNe, with redshift z = 0:3 \Gamma 0:5,...

Measurements of the Cosmological Parameters Omega and Lambda from the First 7 Supernovae at z >= 0.35 (1996)

Perlmutter, S., Gabi, S., Goldhaber, G., Groom, D. E., Hook, I. M., Kim, A. G., ...

We have developed a technique to systematically discover and study high-redshift supernovae that can be used to measure the cosmological parameters. We report here results based on the initial seven...

The Type Ia Supernova Rate at z$\sim 0.4 $ (1996)

Pain, R., Hook, I. M., Deustua, S., Gabi, S., Goldhaber, G., Goobar, A., ...

We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived using a large subset of data from the Supernova Cosmology Project. Three supernovae were...

Scheduled Discoveries of 7+ High-Redshift Supernovae: First Cosmology Results and Bounds on q_0 (1996)

Perlmutter, S., Deustua, S., Gabi, S., Goldhaber, G., Groom, D., Hook, I., ...

Our search for high-redshift Type Ia supernovae discovered, in its first years, a sample of seven supernovae. Using a "batch" search strategy, almost all were discovered before maximum light and were...

K Corrections For Type Ia Supernovae and a Test for Spatial Variation of the Hubble Constant (1996)

Kim, A., Deustua, S., Gabi, S., Goldhaber, G., Groom, D., Hook, I., ...

Cross-filter K corrections for a sample of "normal" Type Ia supernovae (SNe) have been calculated for a range of epochs. With appropriate filter choices, the combined statistical and systematic K...

Observation of Cosmological Time Dilation using Type Ia Supernovae as Clocks (1996)

Goldhaber, G., Deustua, S., Gabi, S., Groom, D., Hook, I., Kim, A., ...

This work is based on the first results from a systematic search for high redshift Type Ia supernovae. Using filters in the R-band we discovered seven such SNe, with redshift z = 0.3 - 0.5, before or...

The Type Ia Supernova Rate at z ~ 0.4 (1996)

Pain, R., Hook, I., Perlmutter, S., Deustua, S., Gabi, S., Goldhaber, G., ...

We present the first measurement of the rate of Type Ia supernovae at high redshift. The result is derived using a large subset of data from the Supernova Cosmology Project as described in more...

A Supernova at z = 0.458 and Implications for Measuring the Cosmological Deceleration (1995)

Perlmutter, S., Pennypacker, C. R., Goldhaber, G., Goobar, A., Muller, R. A., Newberg, H. J. M., ...

We have begun a program to discover high-redshift supernovae ($z \approx$ 0.25--0.5), and study them with follow-up photometry and spectroscopy. We report here our first discovery, a supernova at $z...

Scheduled Discoveries of 7+ High-Redshift Supernovae: First Cosmology Results and Bounds on q0

S. Perlmutter, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, I. Hook, ...

. Our search for high-redshift Type Ia supernovae discovered, in its first years, a sample of seven supernovae. Using a "batch" search strategy, almost all were discovered before maximum...