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GCN Circular 33333

Subject
GRB 230204B: Lowell Discovery Telescope Observations
Date
2023-02-17T00:41:17Z (a year ago)
From
Brendan O'Connor at UMD <oconnorb@umd.edu>
B. O'Connor (UMD, GWU), E. Hammerstein (UMD), S.B. Cenko (UMD,
NASA-GSFC), E. Troja (UTV, ASU), S.Dichiara (PSU),
J. Durbak (UMD, NASA-GSFC), A. Kutyrev (UMD, NASA-GSFC),
S. Veilleux (UMD), I. Andreoni (UMD, NASA-GSFC), and
G. Srinivasaragavan (UMD):

We observed the field of GRB 230204B (Serino et al. GCN 33265;
Kennea et al. GCN 33267) using the Large Monolithic Imager (LMI)
on the 4.3m Lowell Discovery Telescope (LDT) at Happy Jack, AZ.
Observations began on February 13th, 2023 at 11:05:48 UT at
airmass 1.8 under seeing of ~2" with total exposure 2400 s
in i-band.

At the location of the optical counterpart (Swain et al. GCN 33269),
we do not detect any source to depth i>23.7 AB mag.

Magnitudes are calibrated against the SDSS catalog and are not
corrected for Galactic extinction.

We thank the staff of the Lowell Discovery Telescope for assistance
with these observations.
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