[vsnet-grb-info 23841] GRB 191001B: Optical Upper Limits with LCO

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25940
SUBJECT: GRB 191001B: Optical Upper Limits with LCO
DATE:    19/10/03 18:30:36 GMT
FROM:    Robert Strausbaugh at U. of the Virgin Islands  <robert.strausbaugh at uvi.edu>

R. Strausbaugh (U. of the Virgin Islands), A. Cucchiara (U. of the Virgin Islands/College of Marin) report on behalf of a larger collaboration:

We observed Swift GRB 191001B (Barthelmy et al., GCN 25902) with the LCO 1-m Sinistro instrument on October 2, from 01:23 to 01:47 UT (corresponding to 5.73 to 6.2 hours from the GRB trigger time) with the SDSS r’ and i’ filters.

We performed a series of 5x120s exposures in each band. We do not detect any fading sources over the course of our observations in a 26.5' x 26.5' field of view centered around the Swift coordinates (Barthelmy et al., GCN 25902).  Using the USNO-B.1 catalog as reference, we obtain the following 3-sigma upper limits:


r > 18.82

i > 16.98

These observations were possible thanks to the USVI NASA-EPSCoR Research Infrastructure Development (RID) grant NNX16AL44A.