[vsnet-grb-info 15622] GRB 141015A: ISON-NM early optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16911
SUBJECT: GRB 141015A: ISON-NM early optical observations
DATE:    14/10/15 17:27:15 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

L. Elenin (KIAM),  E. Mazaeva (IKI), A. Volnova (IKI), I. Molotov 
(KIAM), A. Pozanenko (IKI) report on behalf of larger GRB  follow-up 
collaboration:

We observed the field of the Swift   GRB 141015A (Troja et al., GCN 
16909) with 0.4-m telescope of ISON-NM observatory starting on Oct., 15 
(UT) 09:16:55, i.e. ~4 minutes after burst triger. We obtained 14 
unfiltered images of 120 s exposure. We do not detect any source within 
XRT error circle (Troja et al., GCN 16910):

UT start   t-T0         Exp.      Filter  UL (3sigma)
          (mid.,days)    (s)
09:16:55  0.0068        5*120    Clear   18.4
09:16:55  0.0131       14*120    Clear   19.0

The photometry is based on nearby USNO-B1.0 stars

USNO-B1.0      RA             DEC            R2
1083-0107546   087,552978    +18,360067     14,78
1083-0107529   087,547650    +18,355839     15,18
1083-0107484   087,534895    +18,341425     15,00
1083-0107360   087,503081    +18,336089     14,71