TITLE:   GCN CIRCULAR
NUMBER:  23521
SUBJECT: MASTER OT J063515.49-624002.9 of Fermi  trigger 565936249: optical observations in SAAO
DATE:    18/12/09 06:09:56 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

A. Volnova (IKI), E. Mazaeva (IKI), S. Belkin (IKI), A. Pozanenko  (IKI)  D. 
Buckley (SAAO) report on behalf of IKI-FuN follow-up collaboration:

We observed  the MASTER OT J063515.49-624002.9  (Chasovnikov et al., GCN 
23520)  of  Fermi trigger 565936249  with 1m telescopes of SAOO observatory. 
Observation started  on Dec. 08 (UT) 21:55:48 in R-filter.  We detected 
optical transient (Chasovnikov et al., GCN  23520). Preliminary  photometry 
is following

Date          UT start         t-T0          Filter  Exp.    OT      Err. 
UL
                                        (mid, days)    (s)


2018-12-08 21:55:48      0.73616 R       3*600  18.63  0.02  21.8

Phootmerty is based on nearby USNO-B1.0 stars

USNO-B1.0 id    RA                  Dec              B2      R2      I2
0273-0095519  06:35:01.97  -62:38:56.6  17,02 16,22 16,47
0273-0095536  06:35:05.27  -62:40:04.6  18,4   17,12 16,91

The optical transient has faded since its discovery. The optical transient 
located at 4.59 degrees from Fermi-GBM Final Position, and ~1 arcsec from 
USNOB-1.0 object  0273-0095603 098.814192 -62.667439 (R=20.98).