GRB23_20170314_G277583 at TAROT Calern observatory

TAROT Calern observatory log of images

IM_20170314_214455330_000000_52962201    40 stars filter C [212356287770.1s - 212356287890.1s] expo=120s elev=53.5deg humid= 74% sunelev=-41.0deg (moon at  94.0deg phase=0.85 elev=+20.0 )
IM_20170314_214706080_000000_52962201    40 stars filter C [212356287900.9s - 212356288020.9s] expo=120s elev=53.1deg humid= 74% sunelev=-41.3deg (moon at  94.0deg phase=0.85 elev=+20.0 )
IM_20170314_235035034_000000_52962301    32 stars filter C [212356295309.9s - 212356295429.9s] expo=120s elev=31.2deg humid= 75% sunelev=-48.5deg (moon at  95.0deg phase=0.84 elev=+35.0 )
IM_20170314_235245815_000000_52962301    35 stars filter C [212356295440.6s - 212356295560.6s] expo=120s elev=30.8deg humid= 75% sunelev=-48.4deg (moon at  95.0deg phase=0.84 elev=+35.0 )
IM_20170315_214455333_000000_52970901    39 stars filter C [212356374170.1s - 212356374290.1s] expo=120s elev=52.8deg humid= 72% sunelev=-40.7deg (moon at 106.0deg phase=0.78 elev=+10.0 )
IM_20170315_214706990_000000_52970901    38 stars filter C [212356374301.8s - 212356374421.8s] expo=120s elev=52.5deg humid= 71% sunelev=-41.0deg (moon at 107.0deg phase=0.78 elev=+10.0 )
IM_20170315_235035281_000000_52971001    40 stars filter C [212356381710.1s - 212356381830.1s] expo=120s elev=30.5deg humid= 61% sunelev=-48.1deg (moon at 107.0deg phase=0.78 elev=+27.0 )
IM_20170315_235246000_000000_52971001    36 stars filter C [212356381840.8s - 212356381960.8s] expo=120s elev=30.1deg humid= 61% sunelev=-48.0deg (moon at 107.0deg phase=0.78 elev=+28.0 )
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=193.993465669 lat=14.997272739
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.049
Assuming Rv=3.1: Av=0.162 Ar=0.131 Ai=0.095
extmap.fit: Extinction map E(B-V) from Schlegel:

Field of View is about 64 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 23_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 23_201 detected by XXX
(trigger XXX) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 212356287770.1s after the GRB trigger
(XXXs after the notice). The elevation of the field decreased from
53 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+212356287770.1s to t0+212356287890.1s : R > 15.1

The second image is 120.0s exposure in tracking mode:
t0+212356287900.9s to t0+212356288020.9s : R > 16.2

We co-added a series of exposures:
t0+212356287900.9s to t0+212356381830.1s : 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 212356287770.1s 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=193.9935 lat=+14.9973
and the galactic extinction in R band is 0.1 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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