GRB2_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_181946028_000000_52952101     0 star  filter C [212356275460.8s - 212356275580.8s] expo=120s elev=67.9deg humid= 71% sunelev=-8.3deg (moon at 112.0deg phase=0.86 elev=-14.0 )
IM_20170314_182157216_000000_52952101     0 star  filter C [212356275592.0s - 212356275712.0s] expo=120s elev=67.8deg humid= 71% sunelev=-8.7deg (moon at 112.0deg phase=0.86 elev=-13.0 )
IM_20170314_190806063_000000_52952201    66 stars filter C [212356278360.9s - 212356278480.9s] expo=120s elev=63.6deg humid= 72% sunelev=-16.9deg (moon at 112.0deg phase=0.85 elev= -6.0 )
IM_20170314_191016871_000000_52952201    75 stars filter C [212356278491.7s - 212356278611.7s] expo=120s elev=63.4deg humid= 73% sunelev=-17.3deg (moon at 112.0deg phase=0.85 elev= -5.0 )
IM_20170314_195624939_000000_52952301    69 stars filter C [212356281259.7s - 212356281379.7s] expo=120s elev=56.9deg humid= 73% sunelev=-25.2deg (moon at 113.0deg phase=0.85 elev= +2.0 )
IM_20170314_195835674_000000_52952301    79 stars filter C [212356281390.5s - 212356281510.5s] expo=120s elev=56.5deg humid= 73% sunelev=-25.6deg (moon at 113.0deg phase=0.85 elev= +2.0 )
No informations from GCN notice.

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=186.181780279 lat=-2.61349866365
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=1.322
Assuming Rv=3.1: Av=4.381 Ar=3.533 Ai=2.564
extmap.fit: 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
GRB 2_2017: TAROT Calern observatory optical observations
----------------------------------------------------------------------
Klotz A., Turpin D., Atteia J.L. (CNRS-OMP-IRAP),
Boer, M., Laugier, R. (CNRS-ARTEMIS),
Gendre B. (UVI - Etelman Obs.) report:

We imaged the field of GRB 2_2017 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356275460.8s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
67 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 1858-11-17T00:00:00.000

The first image is trailed with a duration of 120.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+212356275460.8s to t0+212356275580.8s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356275592.0s to t0+212356275712.0s : R > 16.2

We co-added a series of exposures:
t0+212356275592.0s to t0+212356281510.5s : R > 17.7
---- YES
We detect a new fading source in the error box given by XXX
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 212356275460.8s 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=186.1818 lat= -2.6135
and the galactic extinction in R band is 3.5 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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