AMIGA project: Quantification of the isolation of 950 CIG galaxies (2009)
Verley, S., Leon, S., Verdes-Montenegro, L., Combes, F., Sabater, J., Sulentic, J., ...
The role of the environment on galaxy evolution is still not fully understood. In order to quantify and set limits on the role of nurture one must identify and study a sample of isolated galaxies....
The unusual afterglow of GRB 980326: evidence for the gamma-ray burst/supernova connection (2007)
Bloom Kulkarni, J. S. Bloom, S. R. Kulkarni, S. G. Djorgovski, A. C. Eichelberger, J. P. Blakeslee, ...
this paper in your own paper. However, we do place restrictions on any dissemination in the popular media. The article is under embargo until it is published. For further enquiries, please contact...
The AMIGA sample of isolated galaxies. V. Quantification of the isolation (2007)
Verley, S., Leon, S., Verdes-Montenegro, L., Combes, F., Sabater, J., Sulentic, J., ...
The AMIGA project aims to build a well defined and statistically significant reference sample of isolated galaxies in order to estimate the environmental effects on the formation and evolution of...
The AMIGA sample of isolated galaxies. IV. A catalogue of neighbours around isolated galaxies (2007)
Verley, S., Odewahn, S. C., Verdes-Montenegro, L., Leon, S., Combes, F., Sulentic, J., ...
Studies of the effects of environment on galaxy properties and evolution require well defined control samples. Such isolated galaxy samples have up to now been small or poorly defined. The AMIGA...
Lopes, P. A. A., De Carvalho, R. R., Capelato, H. V., Gal, R. R., Djorgovski, S. G., Brunner, R. J., ...
We present a comparison of optical and X-ray properties of galaxy clusters in the northern sky. We determine the recovery rate of X-ray detected clusters in the optical as a function of richness,...
Lopes, P. A. A., De Carvalho, R. R., Gal, R. R., Djorgovski, S. G., Odewahn, S. C., Mahabal, A. A., ...
We present an optically selected galaxy cluster catalog from ~ 2,700 square degrees of the Digitized Second Palomar Observatory Sky Survey (DPOSS), spanning the redshift range 0.1 < z < 0.5,...
Peculiar Broad Absorption Line Quasars found in DPOSS (2003)
Brunner, Robert J., Hall, Patrick B., Djorgovski, S. George, Gal, R. R., Mahabal, A. A., Lopes, P. A. A., ...
With the recent release of large (i.e., > hundred million objects), well-calibrated photometric surveys, such as DPOSS, 2MASS, and SDSS, spectroscopic identification of important targets is no longer...
Gal, R. R., De Carvalho, R. R., Lopes, P. A. A., Djorgovski, S. G., Brunner, R. J., Mahabal, A. A., ...
We present a new, objectively defined catalog of candidate galaxy clusters based on the galaxy catalogs from the Digitized Second Palomar Observatory Sky Survey (DPOSS). This cluster catalog, derived...
THE DIGITIZED SECOND PALOMAR OBSERVATORY SKY SURVEY (DPOSS). III. STAR-GALAXY SEPARATION (2003)
S. C. Odewahn, R. R. Gal, S. G. Djorgovski, R. Brunner, A. Mahabal, ...
We discuss object classification for a multicolor survey of high-latitude fields from the Digitized Second Palomar Observatory Sky Survey (DPOSS) and the resulting Palomar-Norris Sky Catalog. Two...
The Digitized Second Palomar Observatory Sky Survey (DPOSS) II: Photometric Calibration (2002)
Gal, R. R., De Carvalho, R. R., Odewahn, S. C., Djorgovski, S. G., Mahabal, A. A., Brunner, R. J., ...
We present the photometric calibration technique for the Digitized Second Palomar Observatory Sky Survey (DPOSS), used to create seamless catalogs of calibrated objects over large sky areas. After...
Automated Galaxy Morphology: A Fourier Approach (2001)
Odewahn, S. C., Cohen, S. H., Windhorst, R. A., Philip, N. S.
We use automated surface photometry and pattern classification techniques to morphologically classify galaxies. The two-dimensional light distribution of a galaxy is reconstructed using Fourier...
The Afterglow and the Host Galaxy of the Dark Burst GRB 970828 (2001)
Djorgovski, S. G., Frail, D. A., Kulkarni, S. R., Bloom, J. S., Odewahn, S. C., Diercks, A.
GRB 970828 was the first well-localized gamma-ray burst (GRB) X-ray afterglow for which no optical afterglow was found despite a prompt, deep search down to R_lim ~ 24.5 mag. We report the discovery...
Exploration of Large Digital Sky Surveys (2000)
Djorgovski, S. G., Brunner, R. J., Mahabal, A. A., Odewahn, S. C., De Carvalho, R. R., Gal, R. R., ...
We review some of the scientific opportunities and technical challenges posed by the exploration of the large digital sky surveys, in the context of a Virtual Observatory (VO). The VO paradigm will...
Searches for Rare and New Types of Objects (2000)
Djorgovski, S. G., Mahabal, A. A., Brunner, R. J., Gal, R. R., Castro, S., De Carvalho, R. R., ...
Systematic exploration of the observable parameter space, covered by large digital sky surveys spanning a range of wavelengths, will be one of the primary modes of research with a Virtual Observatory...
Exploring the Multi-Wavelength, Low Surface Brightness Universe (2000)
Brunner, R. J., Djorgovski, S. G., Gal, R. R., Mahabal, A. A., Odewahn, S. C.
Our current understanding of the low surface brightness universe is quite incomplete, not only in the optical, but also in other wavelength regimes. As a demonstration of the type of science which is...
Phillipps, S., Driver, S. P., Couch, W. J., Fernandez-Soto, A., Bristow, P. D., Odewahn, S. C., ...
We combine magnitude and photometric redshift data on galaxies in the Hubble Deep Fields with morphological classifications in order to separate out the distributions for early type galaxies. The...
Mass-to-Light Ratios of Groups and Clusters of Galaxies (2000)
Hradecky, V., Jones, C., Donnelly, R. H., Djorgovski, S. G., Gal, R. R., Odewahn, S. C.
We constrain the mass-to-light ratios, gas mass fractions, baryon mass fractions and the ratios of total to luminous mass for a sample of eight nearby relaxed galaxy groups and clusters: A262, A426,...
The Palomar Abell Cluster Optical Survey I: Photometric Redshifts for 431 Abell Clusters (2000)
Gal, R. R., De Carvalho, R. R, Brunner, R., Odewahn, S. C., Djorgovski, S. G.
This paper presents photometric redshifts for 431 Abell clusters imaged as part of the Palomar Abell Cluster Optical Survey (PACOS), of which 236 are new redshi fts. We have obtained moderately deep,...
The Northern Sky Optical Cluster Survey I: Detection of Galaxy Clusters in DPOSS (1999)
Gal, R. R., DeCarvalho, R. R., Odewahn, S. C., Djorgovski, S. G., Margoniner, V. E.
The Northern Sky Optical Cluster Survey is a project to create an objective catalog of galaxy clusters over the entire high-galactic-latitude Northern sky, with well understood selection criteria. We...
Quasar-Marked Protoclusters and Biased Galaxy Formation (1999)
Djorgovski, S. G., Odewahn, S. C., Gal, R. R., Brunner, R., De Carvalho, R. R.
We report on the current status of our search for protoclusters around quasars at z > 4. While the search is still very incomplete, clustered companion galaxies are found in virtually every case...
Photometric Redshifts for DPOSS Galaxy Clusters at z (1999)
Gal, R. R., Odewahn, S. C., Djorgovski, S. G., Brunner, R., DeCarvalho, R. R.
We report on the creation of an unbiased catalog of galaxy clusters from the galaxy catalogs derived from the digitized POSS-II (DPOSS). Utilizing the g-r color information, we show that it is...
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...
The afterglow, the redshift, and the extreme energetics of the gamma-ray burst 990123 (1999)
Kulkarni, S. R., Djorgovski, S. G., Odewahn, S. C., Bloom, J. S., Gal, R. R., Koresko, C. D., ...
Afterglow, or long-lived emission, has now been detected from about a dozen well-positioned gamma-ray bursts. Distance determinations made by measuring optical emission lines from the host galaxy, or...
The Host Galaxy of GRB 990123 (1999)
Bloom, J. S., Odewahn, S. C., Djorgovski, S. G., Koresko, C., Neugebauer, G., ...
We present deep images of the field of gamma-ray burst (GRB) 990123 obtained in a broad-band UV/visible bandpass with the Hubble Space Telescope, and deep near-infrared images obtained with the...
The Palomar Digital Sky Survey (DPOSS) (1998)
Djorgovski, S. G., Gal, R. R., Odewahn, S. C., De Carvalho, R. R., Brunner, R., Longo, G., ...
We describe DPOSS, a new digital survey of the northern sky, based on the POSS-II photographic sky atlas. The survey covers the entire sky north of delta = -3 deg in 3 bands, calibrated to the Gunn...
The Host Galaxy of the Gamma--Ray Burst 971214 (1998)
Odewahn, S. C., Djorgovski, S. G., Kulkarni, S. R., Dickinson, M., Frail, D. A., Ramaprakash, A. N., ...
We report on Hubble Space Telescope (HST) observations of the host galaxy of GRB 971214, about four months after the burst. The redshift of the proposed host galaxy at z=3.418, combined with optical...
Driver, S. P., Fernandez-Soto, A., Couch, W. J., Odewahn, S. C., Windhorst, R. A., Phillipps, S., ...
We combine the photometric redshift data of Fernandez-Soto et al. (1997) with the morphological data of Odewahn et al. (1996) for all galaxies with I < 26.0 detected in the Hubble Deep Field. From...
The Axis Ratio Distribution of Local and Distant Galaxies (1997)
Odewahn, S. C., Burstein, D., Windhorst, R. A.
Surface photometry from 16 HST/WFPC2 fields in the I(F814W) filter is used to derive the distribution of apparent axis ratios for galaxies in progressively fainter magnitude intervals for I
Data-Mining a Large Digital Sky Survey: From the Challenges to the Scientific Results (1997)
Djorgovski, S. G., De Carvalho, R. R., Odewahn, S. C., Gal, R. R., Roden, J., Stolorz, P., ...
The analysis and an efficient scientific exploration of the Digital Palomar Observatory Sky Survey (DPOSS) represents a major technical challenge. The input data set consists of 3 Terabytes of pixel...
Evolution of the morphological luminosity distributions within rich clusters (0.0 < z < 0.55) (1997)
Driver, S. P., Couch, W. J., Odewahn, S. C., Windhorst, R. A.
We demonstrate the ability to recover morphological luminosity distributions within medium redshift clusters (z ~ 0.55) based on Hubble Space Telescope WFPC2 observations. We postulate that a...