GRB5_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_183414944_000000_52953001    56 stars filter C [212356276329.7s - 212356276449.7s] expo=120s elev=67.7deg humid= 70% sunelev=-10.9deg (moon at 110.0deg phase=0.85 elev=-11.0 )
IM_20170314_183626397_000000_52953001    48 stars filter C [212356276461.2s - 212356276581.2s] expo=120s elev=67.6deg humid= 70% sunelev=-11.3deg (moon at 110.0deg phase=0.85 elev=-11.0 )
IM_20170314_192235966_000000_52953101    74 stars filter C [212356279230.8s - 212356279350.8s] expo=120s elev=63.0deg humid= 73% sunelev=-19.5deg (moon at 110.0deg phase=0.85 elev= -3.0 )
IM_20170314_192446732_000000_52953101    63 stars filter C [212356279361.5s - 212356279481.5s] expo=120s elev=62.7deg humid= 74% sunelev=-19.8deg (moon at 110.0deg phase=0.85 elev= -3.0 )
IM_20170314_201055278_000000_52953201    66 stars filter C [212356282130.1s - 212356282250.1s] expo=120s elev=56.0deg humid= 75% sunelev=-27.6deg (moon at 111.0deg phase=0.85 elev= +4.0 )
IM_20170314_201306028_000000_52953201    69 stars filter C [212356282260.8s - 212356282380.8s] expo=120s elev=55.6deg humid= 74% sunelev=-27.9deg (moon at 111.0deg phase=0.85 elev= +5.0 )
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=186.995393928 lat=-0.902043627633
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=4.729
Assuming Rv=3.1: Av=15.676 Ar=12.640 Ai=9.174 Extinction map E(B-V) from Schlegel:

Field of View is about 55 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 5_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 5_2017 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356276329.7s 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+212356276329.7s to t0+212356276449.7s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356276461.2s to t0+212356276581.2s : R > 16.2

We co-added a series of exposures:
t0+212356276461.2s to t0+212356282380.8s : 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 212356276329.7s 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=186.9954 lat= -0.9020
and the galactic extinction in R band is 12.6 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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