GCN Circular 7423
Subject
GRB080310, LBT and MDM photometry
Event
Date
2008-03-17T01:52:38Z (18 years ago)
From
Peter Garnavich at U of Notre Dame <pgarnavi@nd.edu>
G. Wegner (Dartmouth), P. Garnavich (Notre Dame), J. L. Prieto,
and K. Z. Stanek (OSU) report:
We observed the position of GRB 080310 (Chornock et al. GCN 7381;
Cummings et al., GCN 7382) with the Large Binocular Telescope
(LBC red and blue cameras) on March 13.40 (UT) and with the
MDM 2.4-m Hiltner telescope (Retrocam) on March 14.39 (UT) through
Sloan-r filters.
Using stars calibrated by the SDSS, we estimate the following
r-band magnitudes:
age (days) r mag error telescope
3.04 22.45 0.05 LBT
4.03 23.10 0.10 MDM
The photometry indicates that the afterglow has resumed a steep
decline. Including LBT photometry from March 12 (Garnavich et al.,
GCN 7414), we estimate a power-law decline index of 2.1 between
2 and 4 days after the burst.
A plot of the light curve is available at:
http://www.nd.edu/~pgarnavi/LBT/grb080310/LBT_lightcurve.jpg
The LBT is an international collaboration among institutions in the
United States, Italy and Germany. The LBT Corporation partners are:
* The University of Arizona on behalf of the Arizona university system
* Istituto Nazionale di Astrofisica, Italy
* LBT Beteiligungsgesellschaft, Germany, representing the Max Planck
Society, the Astrophysical Institute Potsdam, and Heidelberg University
* The Ohio State University
* The Research Corporation, on behalf of The University of Notre Dame,
University of Minnesota and University of Virginia
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