GRB140815_6719_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20140816_025404847_000003_21422001     8 stars filter C [79938636.5s - 79938816.5s] expo=180s elev= 6.4deg humid= 57% sunelev=-17.3deg (moon at  56.0deg phase=0.59 elev=+53.0 )
AL_20140816_025716065_000003_21422001     5 stars filter R [79938827.7s - 79939007.7s] expo=180s elev= 6.9deg humid= 57% sunelev=-16.8deg (moon at  56.0deg phase=0.59 elev=+53.0 )
AL_20140816_030026815_000003_21422001     4 stars filter V [79939018.4s - 79939198.4s] expo=180s elev= 7.5deg humid= 57% sunelev=-16.4deg (moon at  56.0deg phase=0.59 elev=+54.0 )
AL_20140816_031834539_000003_21422101     8 stars filter C [79940106.2s - 79940286.2s] expo=180s elev=10.5deg humid= 63% sunelev=-13.8deg (moon at  55.0deg phase=0.59 elev=+55.0 )
AL_20140816_032145274_000003_21422101     7 stars filter R [79940296.9s - 79940476.9s] expo=180s elev=11.0deg humid= 63% sunelev=-13.3deg (moon at  55.0deg phase=0.59 elev=+56.0 )
AL_20140816_032456712_000003_21422101     5 stars filter V [79940488.4s - 79940668.4s] expo=180s elev=11.6deg humid= 64% sunelev=-12.8deg (moon at  55.0deg phase=0.59 elev=+56.0 )
AL_20140816_034306935_000003_21422201     0 star  filter C [79941578.5s - 79941758.5s] expo=180s elev=14.5deg humid= 60% sunelev=-10.0deg (moon at  55.0deg phase=0.59 elev=+57.0 )
AL_20140816_034618357_000003_21422201     0 star  filter R [79941770.0s - 79941950.0s] expo=180s elev=15.0deg humid= 61% sunelev=-9.5deg (moon at  55.0deg phase=0.59 elev=+57.0 )
AL_20140816_034929170_000003_21422201     0 star  filter V [79941960.7s - 79942140.7s] expo=180s elev=15.5deg humid= 61% sunelev=-9.0deg (moon at  55.0deg phase=0.59 elev=+57.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455960.4029812501 2012-02-02T21:40:17.580
Date of notice : 2455960.4030439816 2012-02-02T21:40:23.000
Refined position : yes (error radius=150.0 arcsec)
RA(J2000.0) : 203.5064 13h34m01s5
DEC(J2000.0) : 22.7746 +22d46m28s56
Error box : x=110546:110638 y=-43866:-43775 (pixels)

Other pages about TAROT Calern observatory observations

Status of this alert received by TAROT Calern observatory.
Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=213.567599499 lat=-18.1231813646
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.085
Assuming Rv=3.1: Av=0.283 Ar=0.228 Ai=0.166 Extinction map E(B-V) from Schlegel:

Field of View is about 66 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 140815: TAROT Calern observatory optical observations
Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP),
Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 140815 detected by INTEGRAL
(trigger 6461) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 79938636.5s after the GRB trigger
(79938636.8s after the notice). The elevation of the field increased from
6 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2012-02-02T21:40:23.302

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+79938636.5s to t0+79938816.5s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+79938827.7s to t0+79939007.7s : R > 16.2

We co-added a series of exposures:
t0+79938827.7s to t0+79941758.5s : 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 79938636.5s 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=213.5676 lat=-18.1232
and the galactic extinction in R band is 0.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.