GRB160104_112411_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20160104_185018628_000000_06790301     6 stars filter C [26582.3s - 26762.3s] expo=180s elev=40.2deg humid= 65% sunelev=-28.1deg (moon at 143.0deg phase=0.35 elev=-57.0 )
AL_20160104_185329382_000000_06790301     5 stars filter R [26773.1s - 26953.1s] expo=180s elev=40.7deg humid= 65% sunelev=-28.6deg (moon at 144.0deg phase=0.35 elev=-57.0 )
AL_20160104_185640101_000000_06790301     4 stars filter V [26963.8s - 27143.8s] expo=180s elev=41.2deg humid= 65% sunelev=-29.2deg (moon at 144.0deg phase=0.35 elev=-58.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457391.97513 2016-01-04T11:24:11.232
Decoded useful notice informations.
RA(J2000.0) : 76.7964 05h07m11s1
DEC(J2000.0) : 11.3239 +11d19m26s03
Error radius : 2.2 arcsec
Error box : x=71:73 y=30:31 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=190.058305085 lat=-17.067736348
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.066
Assuming Rv=3.1: Av=0.219 Ar=0.177 Ai=0.128
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 65 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 160104: 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 160104 detected by SWIFT
(trigger 669319) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 7.38h after the GRB trigger.
The elevation of the field increased from
40 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2016-01-04T11:24:11.232

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+26582.3s to t0+26762.3s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+26773.1s to t0+26953.1s : R > 16.2

We co-added a series of exposures:
t0+26773.1s to t0+27143.8s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
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 7.38h 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=190.0583 lat=-17.0677
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.
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