[vsnet-grb-info 7626] GRB 090418B: GRAS002 observatios

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9181
SUBJECT: GRB 090418B: GRAS002 observatios
DATE:    09/04/21 06:27:00 GMT
FROM:    Veli-Pekka Hentunen at Taurus Hill Obs,A95  <veli-pekka.hentunen at kassiopeia.net>

Markku Nissinen (Taurus Hill Observatory) and Veli-Pekka Hentunen (Taurus

Hill Observatory) report:



Global-rent-a-scope GRAS002 Tak Mewlon 0.30m telescope with SBIG ST-8E

CCD at Mayhill (New Mexico, USA) was used for follow-up observations of 

GRB090418B. The observations were started on April 19, at 03:55 UTC (19 hours

after the burst) and stopped at 05:35 UTC. Four unfiltered 600 seconds images

were taken.  We do not detect any new object with respect to POSSII F/USNO-B1.0

inside the BAT error circle. Upper limit for the observations is > 20.5 mag (3UL). Quoted

upper limit has been derived using POSSII F and USNO-B1.0 field stars as reference.

 

Quoted upper limit has been derived using POSSII F and USNO-B1.0 field stars 
as reference.