Photometric redshifts for supernovae Ia in the Supernova Legacy Survey (2009)
Palanque-Delabrouille, N., Ruhlmann-Kleider, V., Pascal, S., Rich, J., Guy, J., Bazin, G., ...
We present a method using the SALT2 light curve fitter to determine the redshift of Type Ia supernovae in the Supernova Legacy Survey (SNLS) based on their photometry in g', r', i' and z'. On 289...
The ESO/VLT 3rd year Type Ia supernova data set from the Supernova Legacy Survey (2009)
Balland, C., Baumont, S., Basa, S., Mouchet, M., Howell, D. A., Astier, P., ...
We present 139 spectra of 124 Type Ia supernovae (SNeIa) that were observed at the ESO/VLT during the first three years of the Canada-France-Hawai Telescope (CFHT) Supernova Legacy Survey (SNLS)....
Photometric Calibration of the Supernova Legacy Survey Fields (2009)
Regnault, N., Conley, A., Guy, J., Sullivan, M., Astier, P., ...
We present the photometric calibration of the Supernova Legacy Survey (SNLS) fields. The SNLS aims at measuring the distances to SNe Ia at (0.3
The Core-collapse rate from the Supernova Legacy Survey (2009)
Bazin, G., Palanque-Delabrouille, N., Rich, J., Ruhlmann-Kleider, V., Aubourg, E., Guillou, L. Le, ...
We use three years of data from the Supernova Legacy Survey (SNLS) to study the general properties of core-collapse and type Ia supernovae. This is the first such study using the "rolling search"...
Howell, D. A., Sullivan, M., Brown, E. F., Conley, A., Borgne, D. Le, Hsiao, E. Y., ...
Timmes, Brown & Truran found that metallicity variations could theoretically account for a 25% variation in the mass of 56Ni synthesized in Type Ia supernovae (SNe Ia), and thus account for a large...
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,...
Type Ia supernovae rates and galaxy clustering from the CFHT supernova legacy survey (2008)
Graham, M. L., Pritchet, C. J., Sullivan, M., Gwyn, S. D. J., Neill, J. D., Hsiao, E. Y., ...
The Canada-France-Hawaii Telescope Supernova Legacy Survey (CFHT SNLS) has created a large homogeneous database of intermediate redshift (0.2 < z < 1.0) type Ia supernovae (SNe Ia). The SNLS team has...
SiFTO: An Empirical Method for Fitting SNe Ia Light Curves (2008)
Conley, A., Sullivan, M., Hsiao, E. Y., Guy, J., Astier, P., Balam, D., ...
We present SiFTO, a new empirical method for modeling type Ia supernovae (SNe Ia) light curves by manipulating a spectral template. We make use of high-redshift SN observations when training the...
Type Ia Supernovae Rates and Galaxy Clustering from the CFHT Supernova Legacy Survey (2008)
Graham, M. L., Pritchet, C. J., Sullivan, M., Gwyn, S. D. J., Neill, J. D., Hsiao, E. Y., ...
The Canada-France-Hawaii Telescope Supernova Legacy Survey (SNLS) has created a large homogeneous database of intermediate redshift (0.2 < z < 1.0) type Ia supernovae (SNe Ia). The SNLS team has...
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...
I. M. Hook, R. G. Mcmahon, A. R. Patnaik, P. N. Wilkinson, M. J. Irwin, ...
GB1508+5714: a radio-loud quasar with z=4.30 and the space density of high redshift, radio--loud quasars
S. Perlmutter, D. E. Groom, I. M. Hook, A. G. Kim, M. Y. Kim, J. C. Lee, ...
R. Pain, 5 R. S. Ellis, 6 R. G. McMahon, 6 B. J. Boyle,
R. Pain, I. M. Hook, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, ...
, R. S. Ellis 7, R. G. McMahon 7, K. Glazebrook
A. G. Kim, D. E. Groom, I. M. Hook, M. Y. Kim, J. C. Lee, C. R. Pennypacker, ...
6 R. G. McMahon, 6 B. J. Boyle,
The Evolution of Radio-Loud Quasars at High Redshift (2007)
I. M. Hook, P. A. Shaver, R. G. Mcmahon
Abstract. We present results from two surveys for radio-loud quasars. These are (1) a northern survey reaching S 5GHz = 0:2Jy and (2) the Parkes QSO survey reaching S 2:7GHz = 0:25Jy which together...
I. M. Hook, R. H. Becker, R. G. Mcmahon, R. L. White
We present the method and first results of a survey for high-redshift (z? 3) radio-loud quasars, which is based on optical identifications of 2902 flat-spectrum radio sources with S5GHz 25mJy. The...
I. M. Hook, R. G. Mcmahon, M. J. Irwin, C. Hazard
We present optical spectroscopic data for a complete sample of 161 S5GHz 0:2Jy, flatspectrum radio sources. The sources were observed as part of a survey for high redshift, radio-loud quasars, and...
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...
Implications For The Hubble Constant from the First Seven Supernovae at (2007)
Kim Gabi, A. G. Kim, D. E. Groom, I. M. Hook, M. Y. Kim, J. C. Lee, ...
The Supernova Cosmology Project has discovered over twenty-eight supernovae (SNe) at 0:35 ! z ! 0:65 in an ongoing program that uses Type Ia SNe as high-redshift distance indicators. Here we present...
I. M. Hook, R. G. Mcmahon, M. J. Irwin, C. Hazard
We present optical spectroscopic data for a complete sample of 161 S5GHz 0:2Jy, flatspectrum radio sources. The sources were observed as part of a survey for high redshift, radio-loud quasars, and...
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
SNLS Spectroscopy: Testing for Evolution in Type Ia Supernovae (2007)
Bronder, T. J., Hook, I. M., Astier, P., Balam, D., Balland, C., Basa, S., ...
Aims: We present a quantitative study of a new data set of high redshift Type Ia supernovae spectra, observed at the Gemini telescopes during the first 34 months of the Supernova Legacy Survey....
Guy, J., Astier, P., Baumont, S., Hardin, D., Pain, R., Regnault, N., ...
We present an empirical model of Type Ia supernovae spectro-photometric evolution with time. The model is built using a large data set including light-curves and spectra of both nearby and distant...
Guy, J., Astier, P., Baumont, S., Hardin, D., Pain, R., Regnault, N., ...
We present an empirical model of Type Ia supernovae spectro-photometric evolution with time. The model is built using a large data set including light-curves and spectra of both nearby and distant...
Guy, J., Astier, P., Baumont, S., Hardin, D., Pain, R., Regnault, N., ...
We present an empirical model of Type Ia supernovae spectro-photometric evolution with time. The model is built using a large data set including light-curves and spectra of both nearby and distant...
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...
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...
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 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...
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...
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....
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...
Guy, J., Astier, P., Baumont, S., Hardin, D., Pain, R., Regnault, N., ...
We present an empirical model of Type Ia supernovae spectro-photometric evolution with time. The model is built using a large data set including light-curves and spectra of both nearby and distant...
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...
The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star (2006)
Howell, D.A., Sullivan, M., Nugent, P.E., Ellis, R.S., Conley, A.J., Le Borgne, D., ...
The acceleration of the expansion of the universe, and the need for Dark Energy, were inferred from the observations of Type Ia supernovae (SNe Ia). There is consensus that SNe Ia are thermonuclear...
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...
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...
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 type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star (2006)
Howell, D.A., Sullivan, M., Nugent, P.E., Ellis, R.S., Conley, A.J., Le Borgne, D., ...
The acceleration of the expansion of the universe, and the need for Dark Energy, were inferred from the observations of Type Ia supernovae (SNe Ia). There is consensus that SNe Ia are thermonuclear...
The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set (2006)
Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., ...
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...
Howell, D. A., Sullivan, M., Perrett, K., Bronder, T. J., Hook, I. M., Astier, P., ...
We present new techiques for improving the efficiency of supernova (SN) classification at high redshift using 64 candidates observed at Gemini North and South during the first year of the Supernova...
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...
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...
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...
The Parkes quarter-Jansky flat-spectrum sample 3. Space density and evolution of QSOs (2004)
Wall, J. V., Jackson, C. A., Shaver, P. A., Hook, I. M., Kellermann, K. I.
We analyze the Parkes quarter-Jansky flat-spectrum sample of QSOs in terms of space density, including the redshift distribution, the radio luminosity function, and the evidence for a redshift...
Type Ia supernova rate at a redshift of ~;0.1 (2004)
Blanc, G., Afonso, C., Alard, C., Albert, J.N., Aldering, G., Amadon, A., ...
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...
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...
A survey for low luminosity quasars at redshift z~5 (2004)
Sharp, R. G., Crampton, D., Hook, I. M., McMahon, R. G.
We present the results of a multi-colour (VIZ) survey for low luminosity (M_B
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...
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...
The Gemini Deep Deep Survey: II. Metals in Star-Forming Galaxies at Redshift 1.3 (2003)
Savaglio, S., Glazebrook, K., Abraham, R. G., Crampton, D., Chen, H. W., McCarthy, P. J. P., ...
The goal of the Gemini Deep Deep Survey (GDDS) is to study an unbiased sample of K
Hook, I. M., Shaver, P. A., Jackson, C. A., Wall, J. V., Kellermann, K. I.
We present optical spectra and redshift measurements for 178 flat-spectrum objects from the Parkes quarter-Jansky flat-spectrum sample. These spectra were obtained in order to compile a complete...
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...
Discovery of Radio-loud Quasars with Redshifts above 4 from the PMN sample (2002)
Hook, I. M., McMahon, R. G., Shaver, P. A., Snellen, I. A. G.
We present results of a new, large survey for high-redshift radio-loud quasars, which targets quasars with z>4. The survey is based on the PMN and NVSS radio surveys, optically identified using...
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...
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,...
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...
PMN J0525-3343: soft X-ray spectral flattening in a blazar at z=4.4 (2000)
Fabian, A. C., Celotti, A., Iwasawa, K., McMahon, R. G., Carilli, C. L., Brandt, W. N., ...
We report optical, radio and X-ray observations of a new distant blazar, PMN J0525-3343, at a redshift of 4.4. The X-ray spectrum measured from ASCA and BeppoSAX flattens below a few keV, in a manner...
The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection (1999)
Bloom, J. S., Kulkarni, S. R., Djorgovski, S. G., Eichelberger, A. C., Cote, P., Blakeslee, J. P., ...
Cosmic gamma-ray bursts (GRBs) have been firmly established as one of the most powerful phenomena in the Universe, releasing electromagnetic energy approaching the rest-mass energy of a neutron star...
VLBI imaging of extremely high redshift quasars at 5 GHz (1999)
Paragi, Z., Frey, S., Gurvits, L. I., Kellermann, K. I., Schilizzi, R. T., McMahon, R. G., ...
We present very long baseline interferometry (VLBI) images of ten very high redshift (z>3) quasars at 5 GHz. The sources 0004+139, 0830+101, 0906+041, 0938+119 and 1500+045 were observed in September...
VLBI imaging of extremely high redshift quasars at 5 GHz (1999)
Paragi, Z., Frey, S., Gurvits, L.I., Kellermann, K.I., Schilizzi, R.T., McMahon, R.G., ...
VLBI imaging of extremely high redshift quasars at 5 GHz (1999)
Paragi, Z., Frey, S., Gurvits, L.I., Kellermann, K.I., Schilizzi, R.T., McMahon, R.G., ...
VLBI imaging of extremely high redshift quasars at 5 GHz (1999)
Z. Paragi, S. Frey, L. I. Gurvits, K. I. Kellermann, R. T. Schilizzi, R. G. Mcmahon, ...
. We present very long baseline interferometry (VLBI) images of ten very high redshift (z ? 3) quasars at 5 GHz. The sources 0004+139, 0830+101, 0906+041, 0938+119 and 1500+045 were observed in...
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...
A Search for High-redshift Quasars Among GB/FIRST Flat-Spectrum Radio Sources (1998)
Hook, I. M., Becker, R. H., McMahon, R. G., White, R. L.
We present the method and first results of a survey for high-redshift (z>3) radio-loud quasars, which is based on optical identifications of 2902 flat-spectrum radio sources with S(5GHz)>= 25mJy. The...
The ASCA spectrum of the z=4.72 blazar, GB 1428+4217 (1998)
Fabian, A. C., Iwasawa, K., Celotti, A., Brandt, W. N., McMahon, R. G., Hook, I. M.
The X-ray luminous quasar GB 1428+4217 at redshift 4.72 has been observed with ASCA. The observed 0.5-10 keV flux is 3.2E-12 erg/s/cm2. We report here on the intrinsic 4-57 keV X-ray spectrum, which...
The Redshift Cutoff and the Quasar Epoch (1998)
Shaver, P. A., Hook, I. M., Jackson, C. A., Wall, J. V., Kellermann, K. I.
We have obtained complete redshift information for a sample of 442 radio-loud quasars with flux densities S(11cm) >= 0.25Jy. These come from a completely-identified sample of 878 flat-spectrum radio...
The Evolution of Radio-loud Quasars at High Redshift (1998)
Hook, I. M., Shaver, P. A., McMahon, R. G.
We present results from two surveys for radio-loud quasars. These are (1) a northern survey reaching S(5GHz)=0.2Jy and (2) the Parkes QSO survey reaching S(2.7GHz)=0.25Jy, which together cover most...
Discovery of radio-loud quasars with z=4.72 and z=4.01 (1998)
We report the discovery of two radio-loud quasars with redshifts greater than four; GB1428+4217 with z=4.72 and GB1713+2148 with z=4.01. This doubles the number of published radio-selected quasars...
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...
Discovery of a Supernova Explosion at Half the Age of the Universe", 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...
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
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...
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...
Hook, I. M., McMahon, R. G., Irwin, M. J., Hazard, C.
We present optical spectroscopic data for a complete sample of 161 S_5GHz >= 0.2 Jy, flat-spectrum radio sources. The sources were observed as part of a survey for high redshift, radio-loud quasars,...
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...
Hook, I. M., McMahon, R. G., Patnaik, A. R., Browne, I. W. A., Wilkinson, P. N., Irwin, M. J., ...
We report the discovery of a radio loud quasar with a redshift of 4.30. This object, which is the first radio selected quasar with a redshift greater than four, was discovered during an observational...