GRB150622_022905_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150622_023034406_000000_00000001     0 star  filter C [   24.3s -    84.3s] expo= 60s elev=78.3deg humid= 80% sunelev=-11.6deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023119796_000000_00000001    34 stars filter C [   99.7s -   129.7s] expo= 30s elev=78.2deg humid= 80% sunelev=-11.5deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023200531_000000_00000001    34 stars filter C [  140.5s -   170.5s] expo= 30s elev=78.1deg humid= 80% sunelev=-11.4deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023241046_000000_00000001    34 stars filter C [  181.0s -   211.0s] expo= 30s elev=78.0deg humid= 80% sunelev=-11.3deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023321578_000000_00000001    31 stars filter C [  221.5s -   251.5s] expo= 30s elev=78.0deg humid= 80% sunelev=-11.2deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023402328_000000_00000001    34 stars filter C [  262.2s -   292.2s] expo= 30s elev=77.9deg humid= 80% sunelev=-11.1deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023543298_000000_00000001    43 stars filter C [  303.2s -   393.2s] expo= 90s elev=77.7deg humid= 80% sunelev=-11.1deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023724767_000000_00000001    40 stars filter C [  404.7s -   494.7s] expo= 90s elev=77.5deg humid= 81% sunelev=-10.9deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_023905267_000000_00000001    36 stars filter R [  505.2s -   595.2s] expo= 90s elev=77.3deg humid= 81% sunelev=-10.6deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_024046017_000000_00000001    38 stars filter C [  605.9s -   695.9s] expo= 90s elev=77.1deg humid= 82% sunelev=-10.4deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_024227001_000000_00000001    33 stars filter C [  706.9s -   796.9s] expo= 90s elev=76.9deg humid= 81% sunelev=-10.2deg (moon at 130.0deg phase=0.36 elev=-36.0 )
AL_20150622_024407970_000000_00000001    31 stars filter R [  807.9s -   897.9s] expo= 90s elev=76.7deg humid= 81% sunelev=-10.0deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_024548962_000000_00000001    28 stars filter C [  908.9s -   998.9s] expo= 90s elev=76.5deg humid= 81% sunelev=-9.8deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_024729728_000000_00000001    28 stars filter C [ 1009.6s -  1099.6s] expo= 90s elev=76.2deg humid= 81% sunelev=-9.6deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_024910665_000000_00000001    22 stars filter R [ 1110.6s -  1200.6s] expo= 90s elev=76.0deg humid= 81% sunelev=-9.4deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_025051196_000000_00000001    22 stars filter C [ 1211.1s -  1301.1s] expo= 90s elev=75.8deg humid= 81% sunelev=-9.2deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_025231962_000000_00000001    20 stars filter C [ 1311.9s -  1401.9s] expo= 90s elev=75.5deg humid= 82% sunelev=-9.0deg (moon at 130.0deg phase=0.36 elev=-37.0 )
AL_20150622_025413165_000000_00000001    17 stars filter R [ 1413.1s -  1503.1s] expo= 90s elev=75.3deg humid= 82% sunelev=-8.8deg (moon at 130.0deg phase=0.36 elev=-37.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457195.60353 2015-06-22T02:29:04.992
Decoded useful notice informations.
RA(J2000.0) : 305.965504297 20h23m51s7
DEC(J2000.0) : 33.8905241592 +33d53m25s88
Error radius : 2.5 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1140507096 lat=-2.04414761438
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.521
Assuming Rv=3.1: Av=1.727 Ar=1.392 Ai=1.010 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 150622: 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 150622 detected by INTEGRAL
(trigger 7100) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 24.3s after the GRB trigger
(18.3s after the notice). The elevation of the field decreased from
78 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-22T02:29:04.992

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+24.3s to t0+84.3s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+99.7s to t0+129.7s : R > 16.2

We co-added a series of exposures:
t0+99.7s to t0+393.2s : 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 24.3s 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= 73.1141 lat= -2.0441
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.