GCN Circular 22440
Subject
MAXI J1813-095 source: AbAO optical observations
Date
2018-02-24T12:35:09Z (7 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), R. Inasaridze (AbAO), A. Pozanenko (IKI), A.
Volnova (IKI), V. Ayvazian (AbAO), O. Kvaratskhelia (AbAO), G.
Inasaridze (AbAO), I. Molotov (KIAM), report on behalf of larger GRB
follow-up collaboration:
We observed the field of the MAXI J1813-095 source (trigger=811167; ATel
#11323 Kawase et al.) with AS-32 (0.7m). We obtained several unfiltered
images starting on Feb. 22 (UT) 01:40:27. We do not detect any evident
object within XRT error circle (Beardmore et al., GCN 22431). The only
one object which is visible in POSS2 in coordinates (J2000) 18:13:33.84
-09:31:54.5 +/-0.8 is also visible in our combined image. The
magnitude of the source is 18.92 +/- 0.12 and calibrated against nearby
USNO-B1.0 stars.
The field photometry is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2018-02-22 01:40:27 0.08079 CR 25*60 n/d n/d 20.2
The photometry is based on several USNO-B1.0 stars
USNO-B.1_id R2
0804-0407386 15.99
0804-0407400 16.34
0804-0407451 15.77