GRB150622_002849_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20150622_003014558_000000_00000001     0 star  filter C [   20.5s -    80.5s] expo= 60s elev=70.3deg humid= 81% sunelev=-21.6deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003100511_000000_00000001    66 stars filter C [   96.4s -   126.4s] expo= 30s elev=70.5deg humid= 81% sunelev=-21.5deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003141683_000000_00000001    66 stars filter C [  137.6s -   167.6s] expo= 30s elev=70.6deg humid= 81% sunelev=-21.5deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003222105_000000_00000001    59 stars filter C [  178.1s -   208.1s] expo= 30s elev=70.7deg humid= 81% sunelev=-21.5deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003302621_000000_00000001    60 stars filter C [  218.6s -   248.6s] expo= 30s elev=70.9deg humid= 81% sunelev=-21.5deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003343355_000000_00000001    64 stars filter C [  259.4s -   289.4s] expo= 30s elev=71.0deg humid= 81% sunelev=-21.4deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003524074_000000_00000001    79 stars filter C [  300.1s -   390.1s] expo= 90s elev=71.2deg humid= 81% sunelev=-21.4deg (moon at 131.0deg phase=0.35 elev=-22.0 )
AL_20150622_003704590_000000_00000001    82 stars filter C [  400.7s -   490.7s] expo= 90s elev=71.4deg humid= 81% sunelev=-21.3deg (moon at 131.0deg phase=0.35 elev=-23.0 )
AL_20150622_003845855_000000_00000001    70 stars filter R [  501.9s -   591.9s] expo= 90s elev=71.7deg humid= 81% sunelev=-21.2deg (moon at 131.0deg phase=0.35 elev=-23.0 )
AL_20150622_004043746_000000_00000001    82 stars filter C [  619.8s -   709.8s] expo= 90s elev=72.0deg humid= 81% sunelev=-21.1deg (moon at 131.0deg phase=0.35 elev=-23.0 )
AL_20150622_004231220_000000_00000001    75 stars filter C [  727.3s -   817.3s] expo= 90s elev=72.3deg humid= 81% sunelev=-21.0deg (moon at 131.0deg phase=0.35 elev=-23.0 )
AL_20150622_004419595_000000_00000001    64 stars filter R [  835.7s -   925.7s] expo= 90s elev=72.6deg humid= 81% sunelev=-20.9deg (moon at 131.0deg phase=0.35 elev=-24.0 )
AL_20150622_004616127_000000_00000001    77 stars filter C [  952.2s -  1042.2s] expo= 90s elev=72.9deg humid= 81% sunelev=-20.8deg (moon at 131.0deg phase=0.35 elev=-24.0 )
AL_20150622_004759705_000000_00000001    86 stars filter C [ 1055.7s -  1145.7s] expo= 90s elev=73.2deg humid= 81% sunelev=-20.7deg (moon at 131.0deg phase=0.35 elev=-24.0 )
AL_20150622_004940892_000000_00000001    68 stars filter R [ 1156.9s -  1246.9s] expo= 90s elev=73.4deg humid= 81% sunelev=-20.6deg (moon at 131.0deg phase=0.35 elev=-24.0 )
AL_20150622_005122330_000000_00000001    78 stars filter C [ 1258.4s -  1348.4s] expo= 90s elev=73.7deg humid= 81% sunelev=-20.6deg (moon at 131.0deg phase=0.35 elev=-25.0 )
AL_20150622_005303138_000000_00000001    86 stars filter C [ 1359.1s -  1449.1s] expo= 90s elev=74.0deg humid= 81% sunelev=-20.5deg (moon at 131.0deg phase=0.35 elev=-25.0 )
AL_20150622_005444372_000000_00000001    67 stars filter R [ 1460.3s -  1550.3s] expo= 90s elev=74.2deg humid= 82% sunelev=-20.4deg (moon at 131.0deg phase=0.35 elev=-25.0 )
AL_20150622_005625606_000000_00000001    79 stars filter C [ 1561.6s -  1651.6s] expo= 90s elev=74.5deg humid= 82% sunelev=-20.3deg (moon at 131.0deg phase=0.35 elev=-25.0 )
AL_20150622_005936091_000000_00000001    85 stars filter C [ 1662.1s -  1842.1s] expo=180s elev=74.8deg humid= 82% sunelev=-20.1deg (moon at 131.0deg phase=0.35 elev=-26.0 )
AL_20150622_010248045_000000_00000001    82 stars filter C [ 1854.0s -  2034.0s] expo=180s elev=75.3deg humid= 84% sunelev=-19.9deg (moon at 131.0deg phase=0.35 elev=-26.0 )
AL_20150622_010559436_000000_00000001    76 stars filter R [ 2045.4s -  2225.4s] expo=180s elev=75.8deg humid= 84% sunelev=-19.7deg (moon at 131.0deg phase=0.35 elev=-27.0 )
AL_20150622_010910998_000000_00000001    86 stars filter C [ 2236.9s -  2416.9s] expo=180s elev=76.2deg humid= 84% sunelev=-19.5deg (moon at 131.0deg phase=0.35 elev=-27.0 )
AL_20150622_011222998_000000_00000001    90 stars filter C [ 2429.0s -  2609.0s] expo=180s elev=76.6deg humid= 83% sunelev=-19.3deg (moon at 131.0deg phase=0.35 elev=-27.0 )
AL_20150622_011533737_000000_00000001    79 stars filter R [ 2619.8s -  2799.8s] expo=180s elev=77.0deg humid= 81% sunelev=-19.1deg (moon at 131.0deg phase=0.35 elev=-28.0 )
AL_20150622_011844408_000000_00000001    76 stars filter C [ 2810.5s -  2990.5s] expo=180s elev=77.4deg humid= 81% sunelev=-18.8deg (moon at 131.0deg phase=0.35 elev=-28.0 )
AL_20150622_012155377_000000_00000001    91 stars filter C [ 3001.3s -  3181.3s] expo=180s elev=77.8deg humid= 80% sunelev=-18.6deg (moon at 131.0deg phase=0.35 elev=-29.0 )
AL_20150622_012506480_000000_00000001    72 stars filter R [ 3192.5s -  3372.5s] expo=180s elev=78.1deg humid= 81% sunelev=-18.3deg (moon at 131.0deg phase=0.35 elev=-29.0 )
AL_20150622_012817167_000000_00000001    90 stars filter C [ 3383.2s -  3563.2s] expo=180s elev=78.5deg humid= 82% sunelev=-18.1deg (moon at 131.0deg phase=0.35 elev=-29.0 )
AL_20150622_013128370_000000_00000001    89 stars filter C [ 3574.4s -  3754.4s] expo=180s elev=78.8deg humid= 82% sunelev=-17.8deg (moon at 131.0deg phase=0.35 elev=-30.0 )
AL_20150622_013439130_000000_00000001    69 stars filter R [ 3765.2s -  3945.2s] expo=180s elev=79.1deg humid= 82% sunelev=-17.5deg (moon at 131.0deg phase=0.35 elev=-30.0 )
AL_20150622_013750583_000000_00000001    95 stars filter C [ 3956.6s -  4136.6s] expo=180s elev=79.3deg humid= 83% sunelev=-17.3deg (moon at 131.0deg phase=0.35 elev=-30.0 )
AL_20150622_014102021_000000_00000001    86 stars filter C [ 4148.1s -  4328.1s] expo=180s elev=79.5deg humid= 83% sunelev=-17.0deg (moon at 131.0deg phase=0.36 elev=-31.0 )
AL_20150622_014412538_000000_00000001    76 stars filter R [ 4338.6s -  4518.6s] expo=180s elev=79.7deg humid= 83% sunelev=-16.7deg (moon at 131.0deg phase=0.36 elev=-31.0 )
AL_20150622_014723945_000000_00000001    90 stars filter C [ 4530.0s -  4710.0s] expo=180s elev=79.9deg humid= 82% sunelev=-16.4deg (moon at 131.0deg phase=0.36 elev=-31.0 )
AL_20150622_015034257_000000_00000001    78 stars filter C [ 4720.3s -  4900.3s] expo=180s elev=80.0deg humid= 81% sunelev=-16.1deg (moon at 131.0deg phase=0.36 elev=-32.0 )
AL_20150622_015345694_000000_00000001    77 stars filter R [ 4911.8s -  5091.8s] expo=180s elev=80.1deg humid= 80% sunelev=-15.8deg (moon at 131.0deg phase=0.36 elev=-32.0 )
AL_20150622_015655960_000000_00000001    84 stars filter C [ 5102.0s -  5282.0s] expo=180s elev=80.1deg humid= 79% sunelev=-15.5deg (moon at 131.0deg phase=0.36 elev=-32.0 )
AL_20150622_020006522_000000_00000001    81 stars filter C [ 5292.6s -  5472.6s] expo=180s elev=80.1deg humid= 78% sunelev=-15.2deg (moon at 131.0deg phase=0.36 elev=-33.0 )
AL_20150622_020317694_000000_00000001    75 stars filter R [ 5483.8s -  5663.8s] expo=180s elev=80.1deg humid= 78% sunelev=-14.8deg (moon at 131.0deg phase=0.36 elev=-33.0 )
AL_20150622_020629171_000000_00000001    73 stars filter C [ 5675.2s -  5855.2s] expo=180s elev=80.0deg humid= 78% sunelev=-14.5deg (moon at 131.0deg phase=0.36 elev=-33.0 )
AL_20150622_020940124_000000_00000001    85 stars filter C [ 5866.2s -  6046.2s] expo=180s elev=79.9deg humid= 79% sunelev=-14.2deg (moon at 131.0deg phase=0.36 elev=-34.0 )
AL_20150622_021251374_000000_00000001    71 stars filter R [ 6057.4s -  6237.4s] expo=180s elev=79.8deg humid= 79% sunelev=-13.8deg (moon at 130.0deg phase=0.36 elev=-34.0 )
AL_20150622_021604452_000000_00000001    81 stars filter C [ 6250.5s -  6430.5s] expo=180s elev=79.6deg humid= 79% sunelev=-13.5deg (moon at 130.0deg phase=0.36 elev=-34.0 )
AL_20150622_021915171_000000_00000001    81 stars filter C [ 6441.2s -  6621.2s] expo=180s elev=79.4deg humid= 79% sunelev=-13.1deg (moon at 130.0deg phase=0.36 elev=-35.0 )
AL_20150622_022226624_000000_00000001    69 stars filter R [ 6632.7s -  6812.7s] expo=180s elev=79.1deg humid= 79% sunelev=-12.8deg (moon at 130.0deg phase=0.36 elev=-35.0 )
AL_20150622_022537843_000000_00000001    80 stars filter C [ 6823.9s -  7003.9s] expo=180s elev=78.8deg humid= 80% sunelev=-12.4deg (moon at 130.0deg phase=0.36 elev=-35.0 )
AL_20150622_022849312_000000_00000001    72 stars filter C [ 7015.3s -  7195.3s] expo=180s elev=78.5deg humid= 80% sunelev=-12.0deg (moon at 130.0deg phase=0.36 elev=-35.0 )
AL_20150622_022916640_000000_00000001     0 star  filter R [ 7206.1s -  7386.1s] expo=180s elev=78.2deg humid= 79% sunelev=-11.7deg (moon at 130.0deg phase=0.36 elev=-36.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457195.52001 2015-06-22T00:28:48.864
Decoded useful notice informations.
RA(J2000.0) : 306.010661129 20h24m02s5
DEC(J2000.0) : 33.8232699489 +33d49m23s77
Error radius : 2.5 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=73.0804271464 lat=-2.11330075654
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.512
Assuming Rv=3.1: Av=1.696 Ar=1.367 Ai=0.992
extmap.fit: 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
GRBlog
ROTSE last GRB images

Example of a GCNC email for this burst

gcncirc@capella.gsfc.nasa.gov
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 7099) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 20.5s after the GRB trigger
(14.5s after the notice). The elevation of the field increased from
70 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2015-06-22T00:28:48.864

The first image is trailed with a duration of 60.0s
(see the description in Klotz et al., 2006, A&A 451, L39).
We do not detect any OT with a limiting magnitude of:
t0+20.5s to t0+80.5s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+96.4s to t0+126.4s : R > 16.2

We co-added a series of exposures:
t0+96.4s to t0+390.1s : 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 20.5s 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= 73.0804 lat= -2.1133
and the galactic extinction in R band is 1.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.
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