GRB150624_185222_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150624_202516056_000003_46738101     0 star  filter C [ 5388.6s -  5568.6s] expo=180s elev=28.9deg humid= 54% sunelev=-9.8deg (moon at 116.0deg phase=0.52 elev=+31.0 )
AL_20150624_202827462_000003_46738101     0 star  filter C [ 5580.0s -  5760.0s] expo=180s elev=29.5deg humid= 54% sunelev=-10.2deg (moon at 116.0deg phase=0.52 elev=+30.0 )
AL_20150624_203139118_000003_46738101    45 stars filter R [ 5771.7s -  5951.7s] expo=180s elev=30.0deg humid= 54% sunelev=-10.6deg (moon at 116.0deg phase=0.52 elev=+30.0 )
AL_20150624_203503855_000003_46738201    45 stars filter C [ 5976.4s -  6156.4s] expo=180s elev=30.6deg humid= 52% sunelev=-11.0deg (moon at 116.0deg phase=0.52 elev=+29.0 )
AL_20150624_203815262_000003_46738201    63 stars filter C [ 6167.8s -  6347.8s] expo=180s elev=31.1deg humid= 52% sunelev=-11.4deg (moon at 116.0deg phase=0.52 elev=+29.0 )
AL_20150624_204126012_000003_46738201    58 stars filter R [ 6358.6s -  6538.6s] expo=180s elev=31.7deg humid= 51% sunelev=-11.7deg (moon at 116.0deg phase=0.52 elev=+28.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457198.28637 2015-06-24T18:52:22.368
Decoded useful notice informations.
RA(J2000.0) : 306.010389883 20h24m02s4
DEC(J2000.0) : 33.8815454612 +33d52m53s56
Error radius : 3.1 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1276519853 lat=-2.07923033403
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.500
Assuming Rv=3.1: Av=1.657 Ar=1.336 Ai=0.970 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
ROTSE last GRB images

Example of a GCNC email for this burst
GRB 150624: 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 150624 detected by INTEGRAL
(trigger 7121) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1.50h after the GRB trigger.
The elevation of the field increased from
28 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-24T18:52:22.368

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+5388.6s to t0+5568.6s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+5580.0s to t0+5760.0s : R > 16.2

We co-added a series of exposures:
t0+5580.0s to t0+6538.6s : R > 17.7
---- 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 1.50h 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= 73.1277 lat= -2.0792
and the galactic extinction in R band is 1.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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