GRB150618_150853_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150618_223747536_000003_46326901     0 star  filter C [26792.4s - 26972.4s] expo=180s elev=48.1deg humid= 76% sunelev=-21.6deg (moon at 129.0deg phase=0.16 elev=-18.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457192.13117 2015-06-18T15:08:53.088
Decoded useful notice informations.
RA(J2000.0) : 306.026622487 20h24m06s3
DEC(J2000.0) : 33.8686810764 +33d52m07s25
Error radius : 2.5 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1161384494 lat=-2.1481579011
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.508
Assuming Rv=3.1: Av=1.684 Ar=1.358 Ai=0.985
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 56 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 150618: 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 150618 detected by INTEGRAL
(trigger 7031) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 7.44h after the GRB trigger.
The elevation of the field was at
48 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-18T15:08:53.088

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+26792.4s to t0+26972.4s : R > 15.1

---- YES
We detect a new fading source in the error box given by INTEGRAL
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 7.44h 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= 73.1161 lat= -2.1482
and the galactic extinction in R band is 1.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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