GCN Circular 7182
Subject
optical observations, XRT in NGC 2770
Date
2008-01-15T13:54:47Z (17 years ago)
From
Bill Peterson at U of Iowa/Dept Phys Astro <albedozero@gmail.com>
B. Peterson, T. Jaeger, R. Mutel
Optical observations were made of the transient X-ray source in NGC 2270 (cfr. GCN
7159) on 11, 12 and 14 Jan. using the 37cm "Rigel" telescope based in southern
Arizona. We used GSC 2495:1420 as a reference for differential photometry,
assigning it a nominal magnitude of 14.3.
We plan further monitoring observations including short photometric scans of
Tycho-2 stars in the field, allowing true magnitudes of the transient to be
determined.
unfiltered SN2007uy XRT
2008/1/11 15.897 +/-0.005 17.919 +/-0.015
2008/1/12 15.825 +/-0.005 17.934 +/-0.017
2008/1/14 15.779 +/-0.005 18.041 +/-0.019
B filter
2008/1/11 15.989 +/-0.021 <19
2008/1/12 15.984 +/-0.012 18.030 +/-0.045
2008/1/14 15.912 +/-0.014 18.134 +/-0.059
V filter
2008/1/11 15.725 +/-0.010 18.320 +/-0.049
2008/1/12 15.684 +/-0.010 18.407 +/-0.054
2008/1/14 15.577 +/-0.010 18.344 +/-0.062
R filter
2008/1/11 15.830 +/-0.010 17.882 +/-0.034
2008/1/12 15.770 +/-0.010 18.245 +/-0.046