GRB150622_153214_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150622_205504345_000003_46677901    42 stars filter C [19185.6s - 19365.6s] expo=180s elev=32.7deg humid= 78% sunelev=-13.3deg (moon at 128.0deg phase=0.40 elev=+19.0 )
AL_20150622_205814860_000003_46677901    14 stars filter R [19376.1s - 19556.1s] expo=180s elev=33.2deg humid= 78% sunelev=-13.7deg (moon at 128.0deg phase=0.40 elev=+18.0 )
AL_20150622_210126298_000003_46677901     6 stars filter V [19567.6s - 19747.6s] expo=180s elev=33.8deg humid= 78% sunelev=-14.0deg (moon at 128.0deg phase=0.40 elev=+17.0 )
AL_20150622_211926033_000003_46678001    52 stars filter C [20647.3s - 20827.3s] expo=180s elev=36.9deg humid= 76% sunelev=-15.8deg (moon at 128.0deg phase=0.40 elev=+14.0 )
AL_20150622_212237236_000003_46678001    43 stars filter R [20838.5s - 21018.5s] expo=180s elev=37.5deg humid= 76% sunelev=-16.1deg (moon at 128.0deg phase=0.40 elev=+14.0 )
AL_20150622_212547710_000003_46678001    35 stars filter V [21029.0s - 21209.0s] expo=180s elev=38.0deg humid= 76% sunelev=-16.4deg (moon at 128.0deg phase=0.40 elev=+13.0 )
AL_20150622_214359600_000003_46678101    49 stars filter C [22120.9s - 22300.9s] expo=180s elev=41.2deg humid= 76% sunelev=-18.0deg (moon at 127.0deg phase=0.40 elev=+10.0 )
AL_20150622_214710806_000003_46678101    39 stars filter R [22312.1s - 22492.1s] expo=180s elev=41.8deg humid= 76% sunelev=-18.3deg (moon at 127.0deg phase=0.40 elev= +9.0 )
AL_20150622_215021306_000003_46678101    25 stars filter V [22502.6s - 22682.6s] expo=180s elev=42.4deg humid= 75% sunelev=-18.5deg (moon at 127.0deg phase=0.40 elev= +9.0 )
AL_20150622_220829515_000003_46678201    62 stars filter C [23590.9s - 23770.9s] expo=180s elev=45.6deg humid= 76% sunelev=-19.8deg (moon at 127.0deg phase=0.41 elev= +6.0 )
AL_20150622_221141047_000003_46678201    52 stars filter R [23782.3s - 23962.3s] expo=180s elev=46.2deg humid= 77% sunelev=-20.1deg (moon at 127.0deg phase=0.41 elev= +5.0 )
AL_20150622_221452451_000003_46678201    39 stars filter V [23973.8s - 24153.8s] expo=180s elev=46.8deg humid= 75% sunelev=-20.3deg (moon at 127.0deg phase=0.41 elev= +4.0 )
AL_20150622_223253764_000003_46678301    47 stars filter C [25055.0s - 25235.0s] expo=180s elev=50.0deg humid= 71% sunelev=-21.2deg (moon at 127.0deg phase=0.41 elev= +1.0 )
AL_20150622_223604509_000003_46678301    28 stars filter R [25245.8s - 25425.8s] expo=180s elev=50.6deg humid= 70% sunelev=-21.4deg (moon at 127.0deg phase=0.41 elev= +1.0 )
AL_20150622_223915743_000003_46678301     6 stars filter V [25437.0s - 25617.0s] expo=180s elev=51.2deg humid= 70% sunelev=-21.5deg (moon at 127.0deg phase=0.41 elev= +0.0 )
AL_20150622_225723677_000003_46678401    53 stars filter C [26525.0s - 26705.0s] expo=180s elev=54.4deg humid= 69% sunelev=-22.2deg (moon at 127.0deg phase=0.41 elev= -2.0 )
AL_20150622_230034193_000003_46678401    43 stars filter R [26715.5s - 26895.5s] expo=180s elev=55.0deg humid= 67% sunelev=-22.3deg (moon at 127.0deg phase=0.41 elev= -3.0 )
AL_20150622_230344740_000003_46678401    26 stars filter V [26906.0s - 27086.0s] expo=180s elev=55.6deg humid= 68% sunelev=-22.4deg (moon at 127.0deg phase=0.41 elev= -3.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457196.14738 2015-06-22T15:32:13.632
Decoded useful notice informations.
RA(J2000.0) : 306.010612893 20h24m02s5
DEC(J2000.0) : 33.8621644069 +33d51m43s79
Error radius : 2.5 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.112304396 lat=-2.09097149747
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.500
Assuming Rv=3.1: Av=1.657 Ar=1.336 Ai=0.970 Extinction map E(B-V) from Schlegel:

Field of View is about 56 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 150622: TAROT Calern observatory optical observations
Klotz A., Turpin D. (IRAP-CNRS-OMP),
Boer M., Gendre B., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA),
Atteia J.L. (IRAP-CNRS-OMP) report:

We imaged the field of GRB 150622 detected by INTEGRAL
(trigger 7108) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 5.33h after the GRB trigger.
The elevation of the field increased from
32 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-22T15:32:13.632

The first image is trailed with a duration of 180.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+19185.6s to t0+19365.6s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+19376.1s to t0+19556.1s : R > 16.2

We co-added a series of exposures:
t0+19376.1s to t0+22300.9s : R > 17.7
---- YES
We detect a new fading source in the error box given by INTEGRAL
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 5.33h 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= 73.1123 lat= -2.0910
and the galactic extinction in R band is 1.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.