GRB17_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_211554870_000000_52960401    50 stars filter C [212356286029.7s - 212356286149.7s] expo=120s elev=54.5deg humid= 71% sunelev=-37.3deg (moon at  99.0deg phase=0.85 elev=+15.0 )
IM_20170314_211806573_000000_52960401    57 stars filter C [212356286161.4s - 212356286281.4s] expo=120s elev=54.1deg humid= 72% sunelev=-37.6deg (moon at  99.0deg phase=0.85 elev=+15.0 )
IM_20170314_232135057_000000_52960501    49 stars filter C [212356293569.9s - 212356293689.9s] expo=120s elev=32.4deg humid= 76% sunelev=-48.2deg (moon at  99.0deg phase=0.84 elev=+32.0 )
IM_20170314_232345854_000000_52960501    43 stars filter C [212356293700.6s - 212356293820.6s] expo=120s elev=32.0deg humid= 75% sunelev=-48.3deg (moon at  99.0deg phase=0.84 elev=+33.0 )
IM_20170315_211554880_000000_52969101    54 stars filter C [212356372429.7s - 212356372549.7s] expo=120s elev=53.8deg humid= 71% sunelev=-37.1deg (moon at 111.0deg phase=0.79 elev= +5.0 )
IM_20170315_211806513_000000_52969101    57 stars filter C [212356372561.4s - 212356372681.4s] expo=120s elev=53.5deg humid= 71% sunelev=-37.3deg (moon at 111.0deg phase=0.79 elev= +5.0 )
IM_20170315_232135322_000000_52969201    53 stars filter C [212356379970.1s - 212356380090.1s] expo=120s elev=31.6deg humid= 68% sunelev=-47.9deg (moon at 112.0deg phase=0.78 elev=+24.0 )
IM_20170315_232346728_000000_52969201    54 stars filter C [212356380101.5s - 212356380221.5s] expo=120s elev=31.3deg humid= 68% sunelev=-47.9deg (moon at 112.0deg phase=0.78 elev=+24.0 )
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=192.865056058 lat=10.5340939226
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.096
Assuming Rv=3.1: Av=0.317 Ar=0.256 Ai=0.186 Extinction map E(B-V) from Schlegel:

Field of View is about 61 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 17_201: 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 17_201 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356286029.7s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
54 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+212356286029.7s to t0+212356286149.7s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356286161.4s to t0+212356286281.4s : R > 16.2

We co-added a series of exposures:
t0+212356286161.4s to t0+212356380090.1s : 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 212356286029.7s 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=192.8651 lat=+10.5341
and the galactic extinction in R band is 0.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

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