GRB150622_143238_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150622_213319132_000003_46674601    80 stars filter C [25056.5s - 25236.5s] expo=180s elev=39.3deg humid= 76% sunelev=-17.1deg (moon at 128.0deg phase=0.40 elev=+12.0 )
AL_20150622_213630600_000003_46674601    52 stars filter R [25248.0s - 25428.0s] expo=180s elev=39.9deg humid= 76% sunelev=-17.4deg (moon at 128.0deg phase=0.40 elev=+11.0 )
AL_20150622_213941116_000003_46674601    30 stars filter V [25438.5s - 25618.5s] expo=180s elev=40.4deg humid= 76% sunelev=-17.7deg (moon at 127.0deg phase=0.40 elev=+11.0 )
AL_20150622_215741470_000003_46674701    71 stars filter C [26518.9s - 26698.9s] expo=180s elev=43.7deg humid= 75% sunelev=-19.1deg (moon at 127.0deg phase=0.40 elev= +7.0 )
AL_20150622_220052892_000003_46674701    58 stars filter R [26710.3s - 26890.3s] expo=180s elev=44.2deg humid= 75% sunelev=-19.3deg (moon at 127.0deg phase=0.40 elev= +7.0 )
AL_20150622_220403923_000003_46674701    33 stars filter V [26901.3s - 27081.3s] expo=180s elev=44.8deg humid= 75% sunelev=-19.5deg (moon at 127.0deg phase=0.41 elev= +6.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457196.10599 2015-06-22T14:32:37.536
Decoded useful notice informations.
RA(J2000.0) : 306.038861031 20h24m09s3
DEC(J2000.0) : 33.8416304338 +33d50m29s86
Error radius : 2.9 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.1087895458 lat=-2.1218496626
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 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 7107) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 6.96h after the GRB trigger.
The elevation of the field increased from
39 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-22T14:32:37.536

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+25056.5s to t0+25236.5s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+25248.0s to t0+25428.0s : R > 16.2

We co-added a series of exposures:
t0+25248.0s to t0+27081.3s : 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 6.96h 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= 73.1088 lat= -2.1218
and the galactic extinction in R band is 1.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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