GRB0_20170302_G275404 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170302_021006588_000000_51156001    57 stars filter C [212355180481.3s - 212355180601.3s] expo=120s elev= 9.2deg humid= 65% sunelev=-41.8deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_021217978_000000_51156001    60 stars filter C [212355180612.8s - 212355180732.8s] expo=120s elev= 9.6deg humid= 65% sunelev=-41.5deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_023416163_000000_51156101    75 stars filter C [212355181931.0s - 212355182051.0s] expo=120s elev=13.5deg humid= 65% sunelev=-38.2deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_023627194_000000_51156101    66 stars filter C [212355182062.0s - 212355182182.0s] expo=120s elev=13.9deg humid= 65% sunelev=-37.9deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_025826121_000000_51156201    77 stars filter C [212355183381.0s - 212355183501.0s] expo=120s elev=17.9deg humid= 64% sunelev=-34.4deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_030036903_000000_51156201    66 stars filter C [212355183511.7s - 212355183631.7s] expo=120s elev=18.3deg humid= 64% sunelev=-34.1deg (moon at  97.0deg phase=0.25 elev=-40.0 )
IM_20170302_032235608_000000_51156301    80 stars filter C [212355184830.4s - 212355184950.4s] expo=120s elev=22.2deg humid= 67% sunelev=-30.4deg (moon at  97.0deg phase=0.25 elev=-39.0 )
IM_20170302_032446264_000000_51156301    75 stars filter C [212355184961.2s - 212355185081.2s] expo=120s elev=22.6deg humid= 68% sunelev=-30.0deg (moon at  97.0deg phase=0.25 elev=-39.0 )
IM_20170302_034645975_000000_51156401    80 stars filter C [212355186280.9s - 212355186400.9s] expo=120s elev=26.6deg humid= 68% sunelev=-26.3deg (moon at  98.0deg phase=0.26 elev=-38.0 )
IM_20170302_034856716_000000_51156401    81 stars filter C [212355186411.6s - 212355186531.6s] expo=120s elev=27.0deg humid= 69% sunelev=-25.9deg (moon at  98.0deg phase=0.26 elev=-38.0 )
IM_20170302_041056433_000000_51156501    98 stars filter C [212355187731.3s - 212355187851.3s] expo=120s elev=30.8deg humid= 68% sunelev=-22.0deg (moon at  98.0deg phase=0.26 elev=-36.0 )
IM_20170302_041307401_000000_51156501    88 stars filter C [212355187862.2s - 212355187982.2s] expo=120s elev=31.2deg humid= 68% sunelev=-21.6deg (moon at  98.0deg phase=0.26 elev=-36.0 )
IM_20170302_043506135_000000_51156601    98 stars filter C [212355189181.0s - 212355189301.0s] expo=120s elev=35.0deg humid= 68% sunelev=-17.7deg (moon at  98.0deg phase=0.26 elev=-34.0 )
IM_20170302_043716901_000000_51156601    95 stars filter C [212355189311.7s - 212355189431.7s] expo=120s elev=35.4deg humid= 68% sunelev=-17.3deg (moon at  98.0deg phase=0.26 elev=-34.0 )
IM_20170302_045916096_000000_51156701    94 stars filter C [212355190630.9s - 212355190750.9s] expo=120s elev=39.1deg humid= 69% sunelev=-13.4deg (moon at  99.0deg phase=0.26 elev=-31.0 )
IM_20170302_050127033_000000_51156701    80 stars filter C [212355190761.9s - 212355190881.9s] expo=120s elev=39.4deg humid= 69% sunelev=-13.0deg (moon at  99.0deg phase=0.26 elev=-31.0 )
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=45.3660038274 lat=1.19433030346
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=2.670
Assuming Rv=3.1: Av=8.850 Ar=7.136 Ai=5.179 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 0_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 0_2017 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212355180481.3s after the GRB trigger
(XXXs after the notice). The elevation of the field increased from
9 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+212355180481.3s to t0+212355180601.3s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212355180612.8s to t0+212355180732.8s : R > 16.2

We co-added a series of exposures:
t0+212355180612.8s to t0+212355184950.4s : 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 212355180481.3s 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= 45.3660 lat= +1.1943
and the galactic extinction in R band is 7.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.