GRB980326 optical observations
Abstract
in the observations of UT Mar 30.2 using the LRIS instrument on Keck II (see GCN#34) OT980326 (see IAUC6582) is irregular in shape, with some elongation roughly NE to SW. We have therefore analyzed the OT photometry with a 1.5" aperture to include all the light up to the point where the curve-of-growth flattens. The OT, with 900 seconds of exposure, was delta R= 3.1 and 4.7 mag fainter than stars 2 and 3 of IAUC6582, where these reference stars were measured with a larger 3.0" aperture. This yields R = 24.8 or 25.0 mag for the OT using the absolute calibrations for stars 2 and 3. Note that the OT has a neighboring object currently 0.7 mag brighter, approximately 1.4" E, 0.7" S of the OT.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- March 1998
- Bibcode:
- 1998GCN....35....1G