GRB27_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_220415470_000000_52963401    34 stars filter C [212356288930.3s - 212356289050.3s] expo=120s elev=52.9deg humid= 76% sunelev=-43.1deg (moon at  95.0deg phase=0.85 elev=+22.0 )
IM_20170314_220626189_000000_52963401    32 stars filter C [212356289061.0s - 212356289181.0s] expo=120s elev=52.5deg humid= 76% sunelev=-43.4deg (moon at  95.0deg phase=0.85 elev=+23.0 )
IM_20170315_000955186_000000_52963501    29 stars filter C [212356296470.0s - 212356296590.0s] expo=120s elev=30.3deg humid= 73% sunelev=-48.0deg (moon at  96.0deg phase=0.84 elev=+37.0 )
IM_20170315_001205701_000000_52963501    29 stars filter C [212356296600.5s - 212356296720.5s] expo=120s elev=29.9deg humid= 72% sunelev=-48.0deg (moon at  96.0deg phase=0.84 elev=+37.0 )
IM_20170315_220415460_000000_52972101    38 stars filter C [212356375330.3s - 212356375450.3s] expo=120s elev=52.2deg humid= 70% sunelev=-42.8deg (moon at 107.0deg phase=0.78 elev=+13.0 )
IM_20170315_220626445_000000_52972101    36 stars filter C [212356375461.2s - 212356375581.2s] expo=120s elev=51.8deg humid= 70% sunelev=-43.0deg (moon at 107.0deg phase=0.78 elev=+13.0 )
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=189.750623227 lat=16.650548129
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.064
Assuming Rv=3.1: Av=0.212 Ar=0.171 Ai=0.124 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 27_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 27_201 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356288930.3s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
52 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+212356288930.3s to t0+212356289050.3s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356289061.0s to t0+212356289181.0s : R > 16.2

We co-added a series of exposures:
t0+212356289061.0s to t0+212356375581.2s : 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 212356288930.3s 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=189.7506 lat=+16.6505
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.