ar X iv : a st ro - p h / 02 05 14 4 v 1 9 M ay 2 00 2 X - ray Rich GRB , Photospheres and Variability

ar X iv : a st ro - p h / 02 05 14 4 v 2 1 9 Ju n 20 02 X - ray Rich GRB , Photospheres and Variability

We investigate the relationship between the quasi-thermal baryon-related photosphere in relativistic outflows, and the internal shocks arising outside them, which out to a limiting radius may be able to create enough pairs to extend the optically thick region. Variable gamma-ray light curves are likely to arise outside this limiting pair-forming shock radius, while X-ray excess bursts may arise...

ar X iv : a st ro - p h / 95 05 14 5 v 1 3 1 M ay 1 99 5 Search for GRB counterparts

ar X iv : a st ro - p h / 05 02 36 3 v 2 1 9 M ay 2 00 5 Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE - II

We present a measurement of the microlensing optical depth toward the Galactic Bulge based on 4 years of OGLE-II survey. We consider only bright sources in the extended Red Clump Giant (RCG) region of the Color-Magnitude

ar X iv : a st ro - p h / 05 05 55 5 v 1 2 7 M ay 2 00 5 Pulsars as Tools for Fundamental Physics & Astrophysics

X iv :a st ro -p h/ 05 05 55 5v 1 2 7 M ay 2 00 5 Pulsars as Tools for Fundamental Physics & Astrophysics J. M. Cordes, M. Kramer, T. J. W. Lazio , B. W. Stappers, D. C. Backer, S. Johnston Department of Astronomy and NAIC, Cornell University, Ithaca, NY USA University of Manchester, Jodrell Bank Observatory, Jodrell Bank, UK Naval Research Laboratory, Remote Sensing Division, Washington, DC US...

ar X iv : a st ro - p h / 01 09 00 9 v 1 2 S ep 2 00 1 Optical Observations of the Dark Gamma - Ray Burst GRB 000210

We report on optical observations on GRB 000210 obtained with the 2.56m Nordic Optical Telescope and the 1.54-m Danish Telescope starting 12.4 hours after the gamma-ray event. The content of the X-ray error box determined by the Chandra satellite is discussed.