[vsnet-grb-info 16423] GRB 150413A: Bassano Bresciano Observatory optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Apr 15 00:50:03 JST 2015
TITLE: GCN CIRCULAR
NUMBER: 17704
SUBJECT: GRB 150413A: Bassano Bresciano Observatory optical observations
DATE: 15/04/14 15:49:55 GMT
FROM: Ulisse Quadri at Bassano Bresciano Obs <oabb at ulisse.bs.it>
U.Quadri, L.Strabla and R.Girelli report:
We imaged the field of GRB 150413A detected by SWIFT(trigger 637899)
with the robotic telescope of (IAU station 565) Bassano Bresciano
Observatory, Italy (member of ISSP:Italian Supernovae Search Project)
The observations started 5.44 hour after the GRB trigger, at the end of twilight,
with our schmidt telescope D=320/400 mm F/D=3.1.
Weather conditions were good.
We co-added 13 series of 10 exposures of 120 sec each.
Start T0+ End T0+ Vlim
---------------------------------
5.44 hour 10.26 hour 19.5
We clearly detect the optical counterpart
at the following coordinates:
12h 41m 41.78s +71d 50m 27s +-2 arcsc.
Magnitudes were estimated with the UCAC4 cat.
and are not corrected for galactic dust extinction:
----------------------
JD CV mag
----------------------
2457126.30650 17.92
2457126.32100 17.94
2457126.33532 18.10
2457126.34963 17.83
2457126.36395 17.99
2457126.37827 18.02
2457126.39258 18.21
2457126.40691 18.10
2457126.42122 18.21
2457126.43482 18.28
2457126.47849 18.54
2457126.49282 18.78
2457126.50714 19.20
The image, and magnitude plot are available at:
http://www.osservatoriobassano.org/GRB.asp
The message may be cited.
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