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A Survey for Large Separation Lensed FIRST Quasars, II. Magnification Bias and Redshift Distribution
Eran O. Ofek, Hans-Walter Rix, Dan Maoz +1
The statistics of large-separation gravitational lensing are a powerful tool to probe mass distributions on the scale of galaxy clusters. In this paper we refine the analysis of ou…
Discovery of GRB 020405 and its Late Red Bump
P. A. Price, S. R. Kulkarni, E. Berger +41
We present the discovery of GRB 020405 made with the Inter-Planetary Network (IPN). With a duration of 60 s, the burst appears to be a typical long duration event. We observed the…
Supernova 2002ap - The First Month
Avishay Gal-Yam, Eran O. Ofek, Ohad Shemmer
Supernova (SN) 2002ap in M74 was discovered on January 29, 2002. Being one of the nearest (10 Mpc) SN events in the last decades, and spectroscopically similar to the so-called ``h…
Orphan GRB radio afterglows: Candidates and constraints on beaming
Amir Levinson, Eran Ofek, Eli Waxman +1
The number of orphan radio afterglows associated with gamma-ray bursts (GRBs) that should be detected by a flux limited radio survey, is calculated. It is shown that for jetted GRB…
SDSS J124602.54+011318.8: A Highly Variable AGN, Not an Orphan GRB Afterglow
Avishay Gal-Yam, Eran O. Ofek, Alexei V. Filippenko +2
The optically variable source SDSS J124602.54+011318.8 first appears in Sloan Digital Sky Survey (SDSS) data as a bright point source with nonstellar colors. Subsequent SDSS imagin…