GRB121013_205249_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20121013_210117827_000002_63406901    30 stars filter C [  414.0s -   504.0s] expo= 90s elev= 9.1deg humid= 91% sunelev=-43.4deg (moon at  94.0deg phase=0.13 elev=-48.0 )
AL_20121013_210258797_000002_63406901    29 stars filter C [  514.9s -   604.9s] expo= 90s elev= 9.4deg humid= 90% sunelev=-43.6deg (moon at  94.0deg phase=0.13 elev=-49.0 )
AL_20121013_210439796_000002_63406901    33 stars filter C [  615.9s -   705.9s] expo= 90s elev= 9.7deg humid= 91% sunelev=-43.9deg (moon at  94.0deg phase=0.13 elev=-49.0 )
AL_20121013_210637703_000002_63407001    36 stars filter C [  733.8s -   823.8s] expo= 90s elev=10.0deg humid= 90% sunelev=-44.1deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_210818438_000002_63407001    35 stars filter C [  834.6s -   924.6s] expo= 90s elev=10.3deg humid= 90% sunelev=-44.3deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_210959410_000002_63407001    29 stars filter C [  935.5s -  1025.5s] expo= 90s elev=10.6deg humid= 89% sunelev=-44.6deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_211145520_000002_63407101    31 stars filter C [ 1041.6s -  1131.6s] expo= 90s elev=10.9deg humid= 89% sunelev=-44.8deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_211327160_000002_63407101    35 stars filter C [ 1143.3s -  1233.3s] expo= 90s elev=11.2deg humid= 89% sunelev=-45.0deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_211508130_000002_63407101    36 stars filter C [ 1244.3s -  1334.3s] expo= 90s elev=11.4deg humid= 88% sunelev=-45.3deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_211657036_000002_63407201    37 stars filter C [ 1353.1s -  1443.1s] expo= 90s elev=11.8deg humid= 88% sunelev=-45.5deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_211838005_000002_63407201    39 stars filter C [ 1454.1s -  1544.1s] expo= 90s elev=12.0deg humid= 88% sunelev=-45.7deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_212018978_000002_63407201    39 stars filter C [ 1555.1s -  1645.1s] expo= 90s elev=12.3deg humid= 88% sunelev=-45.9deg (moon at  94.0deg phase=0.12 elev=-49.0 )
AL_20121013_212453946_000002_63407301    46 stars filter C [ 1740.1s -  1920.1s] expo=180s elev=13.0deg humid= 87% sunelev=-46.3deg (moon at  94.0deg phase=0.12 elev=-50.0 )
AL_20121013_212804680_000002_63407301    42 stars filter C [ 1930.8s -  2110.8s] expo=180s elev=13.5deg humid= 87% sunelev=-46.7deg (moon at  94.0deg phase=0.12 elev=-50.0 )
AL_20121013_213115472_000002_63407301    35 stars filter R [ 2121.6s -  2301.6s] expo=180s elev=14.1deg humid= 87% sunelev=-47.1deg (moon at  94.0deg phase=0.12 elev=-50.0 )
AL_20121013_213431722_000002_63407401    42 stars filter C [ 2317.9s -  2497.9s] expo=180s elev=14.6deg humid= 85% sunelev=-47.5deg (moon at  95.0deg phase=0.12 elev=-50.0 )
AL_20121013_213742003_000002_63407401    45 stars filter C [ 2508.1s -  2688.1s] expo=180s elev=15.2deg humid= 84% sunelev=-47.9deg (moon at  95.0deg phase=0.12 elev=-50.0 )
AL_20121013_214052508_000002_63407401    45 stars filter R [ 2698.7s -  2878.7s] expo=180s elev=15.7deg humid= 84% sunelev=-48.2deg (moon at  95.0deg phase=0.12 elev=-50.0 )
AL_20121013_214413960_000002_63407501    59 stars filter C [ 2900.1s -  3080.1s] expo=180s elev=16.3deg humid= 84% sunelev=-48.6deg (moon at  95.0deg phase=0.12 elev=-50.0 )
Informations from GCN notice:
This is not a GRB (a retractation has been edited)
Date of the alert : 2456214.37001 2012-10-13T20:52:48.864
Decoded useful notice informations.
RA(J2000.0) : 83.524791 05h34m05s9
DEC(J2000.0) : 22.087392 +22d05m14s61
Error radius : 3.2 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=184.441536 lat=-5.830050
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.441
Assuming Rv=3.1: Av=1.461 Ar=1.178 Ai=0.855 Extinction map E(B-V) from Schlegel:

Field of View is about 58 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 121013: TAROT Calern observatory optical observations
Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),
Boer M. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 121013 detected by INTEGRAL
(trigger 6678) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 414.0s after the GRB trigger
(408.8s after the notice). The elevation of the field increased from
9 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-10-13T20:52:48.864

The first image is trailed with a duration of 90.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+414.0s to t0+504.0s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+514.9s to t0+604.9s : R > 16.2

We co-added a series of exposures:
t0+514.9s to t0+1131.6s : 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 414.0s 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=184.4415 lat= -5.8300
and the galactic extinction in R band is 1.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.