GRB160314_113251_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20160314_183448017_000000_15918001    20 stars filter C [25131.6s - 25311.6s] expo=180s elev=60.4deg humid= 81% sunelev=-10.8deg (moon at  39.0deg phase=0.43 elev=+54.0 )
AL_20160314_183758329_000000_15918001    16 stars filter R [25321.9s - 25501.9s] expo=180s elev=60.7deg humid= 81% sunelev=-11.3deg (moon at  39.0deg phase=0.43 elev=+54.0 )
AL_20160314_184108829_000000_15918001    21 stars filter V [25512.4s - 25692.4s] expo=180s elev=60.9deg humid= 81% sunelev=-11.9deg (moon at  39.0deg phase=0.43 elev=+53.0 )
AL_20160314_185917841_000000_15918101    23 stars filter C [26601.4s - 26781.4s] expo=180s elev=62.2deg humid= 81% sunelev=-15.1deg (moon at  39.0deg phase=0.43 elev=+51.0 )
AL_20160314_190228794_000000_15918101    13 stars filter R [26792.4s - 26972.4s] expo=180s elev=62.4deg humid= 81% sunelev=-15.7deg (moon at  39.0deg phase=0.43 elev=+50.0 )
AL_20160314_190539384_000000_15918101    14 stars filter V [26982.9s - 27162.9s] expo=180s elev=62.5deg humid= 80% sunelev=-16.3deg (moon at  39.0deg phase=0.43 elev=+50.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457461.98115 2016-03-14T11:32:51.360
Decoded useful notice informations.
RA(J2000.0) : 112.7891 07h31m09s3
DEC(J2000.0) : 16.9987 +16d59m55s31
Error radius : 2.2 arcsec
Error box : x=54:55 y=61:62 (pixels)

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=201.81577351 lat=16.2582115058
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.081
Assuming Rv=3.1: Av=0.269 Ar=0.217 Ai=0.157 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
ROTSE last GRB images

Example of a GCNC email for this burst
GRB 160314: 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 160314 detected by SWIFT
(trigger 679120) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 6.98h after the GRB trigger.
The elevation of the field increased from
60 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2016-03-14T11:32:51.360

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+25131.6s to t0+25311.6s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+25321.9s to t0+25501.9s : R > 16.2

We co-added a series of exposures:
t0+25321.9s to t0+27162.9s : 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 6.98h 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=201.8158 lat=+16.2582
and the galactic extinction in R band is 0.2 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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