GRB151001_150423_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20151001_180411432_000003_54023001     0 star  filter C [10603.7s - 10783.7s] expo=180s elev=33.4deg humid= 64% sunelev=-9.4deg (moon at 154.0deg phase=0.72 elev=-16.0 )
AL_20151001_180450807_000003_54023001     0 star  filter R [10794.4s - 10974.4s] expo=180s elev=32.8deg humid= 65% sunelev=-10.0deg (moon at 153.0deg phase=0.72 elev=-15.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457297.12804 2015-10-01T15:04:22.656
Decoded useful notice informations.
RA(J2000.0) : 233.7287 15h34m54s8
DEC(J2000.0) : 10.9672 +10d58m01s91
Error radius : 0.4 arcsec

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=18.1824624617 lat=48.371751424
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.037
Assuming Rv=3.1: Av=0.121 Ar=0.098 Ai=0.071
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 110 arcmin (north is NOT up !)

Bibliography (Last GCNC circulars and status of satellites)

GCN infos of this burst
GCN notice of this burst
Sloan Digital Sky Survey Observations of Gamma Ray Burst Fields
GCN info bursts
Gamma-ray burst real-time sky map
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 151001: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Turpin D. (IRAP-CNRS-OMP),
Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 151001 detected by SWIFT
(trigger 657286) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 2.95h after the GRB trigger.
The elevation of the field decreased from
33 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-10-01T15:04:22.656

The first image is trailed with a duration of 180.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+10603.7s to t0+10783.7s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+10794.4s to t0+10974.4s : R > 16.2

We co-added a series of exposures:
t0+10794.4s to t0+10974.4s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
We detected the candidate couterpart mentioned by XXX et al. (GCNC XXXX)
at the following position (+/- 3 arcsec):

RA(J2000.0) = XXh XXm XX.XXs
DEC(J2000.0) +XXd XX' XX.X"

OT was R~XX.X at 2.95h after GRB.
----

Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

N.B. Galactic coordinates are lon= 18.1825 lat=+48.3718
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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