GRB170101_022602_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20170101_035749356_000000_44531501     3 stars filter C [ 5323.3s -  5503.3s] expo=180s elev= 1.1deg humid= 34% sunelev=-33.5deg (moon at  55.0deg phase=0.18 elev=-51.0 )
AL_20170101_040100344_000000_44531501     0 star  filter C [ 5514.3s -  5694.3s] expo=180s elev= 1.6deg humid= 34% sunelev=-32.9deg (moon at  55.0deg phase=0.18 elev=-50.0 )
AL_20170101_040412032_000000_44531501     7 stars filter C [ 5706.0s -  5886.0s] expo=180s elev= 2.2deg humid= 34% sunelev=-32.3deg (moon at  55.0deg phase=0.18 elev=-50.0 )
AL_20170101_040743172_000000_44531601    11 stars filter C [ 5917.1s -  6097.1s] expo=180s elev= 2.7deg humid= 34% sunelev=-31.7deg (moon at  55.0deg phase=0.19 elev=-49.0 )
AL_20170101_041054359_000000_44531601    13 stars filter C [ 6108.3s -  6288.3s] expo=180s elev= 3.3deg humid= 35% sunelev=-31.1deg (moon at  55.0deg phase=0.19 elev=-49.0 )
AL_20170101_041405812_000000_44531601    11 stars filter C [ 6299.8s -  6479.8s] expo=180s elev= 3.8deg humid= 35% sunelev=-30.5deg (moon at  55.0deg phase=0.19 elev=-49.0 )
AL_20170101_041721890_000000_44531701    11 stars filter C [ 6495.9s -  6675.9s] expo=180s elev= 4.4deg humid= 34% sunelev=-29.9deg (moon at  55.0deg phase=0.19 elev=-48.0 )
AL_20170101_042033217_000000_44531701    15 stars filter C [ 6687.1s -  6867.1s] expo=180s elev= 4.9deg humid= 34% sunelev=-29.4deg (moon at  55.0deg phase=0.19 elev=-48.0 )
AL_20170101_042344810_000000_44531701    14 stars filter C [ 6878.8s -  7058.8s] expo=180s elev= 5.5deg humid= 34% sunelev=-28.8deg (moon at  55.0deg phase=0.19 elev=-47.0 )
AL_20170101_042701404_000000_44531801    20 stars filter C [ 7075.3s -  7255.3s] expo=180s elev= 6.0deg humid= 34% sunelev=-28.2deg (moon at  55.0deg phase=0.19 elev=-47.0 )
AL_20170101_043012158_000000_44531801    19 stars filter C [ 7266.0s -  7446.0s] expo=180s elev= 6.6deg humid= 34% sunelev=-27.6deg (moon at  55.0deg phase=0.19 elev=-46.0 )
AL_20170101_043323142_000000_44531801    19 stars filter C [ 7457.0s -  7637.0s] expo=180s elev= 7.2deg humid= 34% sunelev=-27.1deg (moon at  55.0deg phase=0.19 elev=-46.0 )
AL_20170101_043646080_000000_44531901    23 stars filter C [ 7660.1s -  7840.1s] expo=180s elev= 7.7deg humid= 34% sunelev=-26.5deg (moon at  55.0deg phase=0.19 elev=-45.0 )
AL_20170101_043957367_000000_44531901    19 stars filter C [ 7851.3s -  8031.3s] expo=180s elev= 8.3deg humid= 34% sunelev=-25.9deg (moon at  55.0deg phase=0.19 elev=-45.0 )
AL_20170101_044308570_000000_44531901    23 stars filter C [ 8042.5s -  8222.5s] expo=180s elev= 8.9deg humid= 35% sunelev=-25.3deg (moon at  55.0deg phase=0.19 elev=-44.0 )
AL_20170101_044629367_000000_44532001    26 stars filter C [ 8243.2s -  8423.2s] expo=180s elev= 9.5deg humid= 35% sunelev=-24.7deg (moon at  55.0deg phase=0.19 elev=-44.0 )
AL_20170101_044940306_000000_44532001    21 stars filter C [ 8434.2s -  8614.2s] expo=180s elev=10.0deg humid= 35% sunelev=-24.2deg (moon at  55.0deg phase=0.19 elev=-43.0 )
AL_20170101_045251978_000000_44532001    25 stars filter C [ 8625.9s -  8805.9s] expo=180s elev=10.6deg humid= 34% sunelev=-23.6deg (moon at  55.0deg phase=0.19 elev=-43.0 )
AL_20170101_045614775_000000_44532101    24 stars filter C [ 8828.7s -  9008.7s] expo=180s elev=11.2deg humid= 34% sunelev=-23.0deg (moon at  55.0deg phase=0.19 elev=-42.0 )
AL_20170101_045925741_000000_44532101    29 stars filter C [ 9019.7s -  9199.7s] expo=180s elev=11.8deg humid= 34% sunelev=-22.4deg (moon at  56.0deg phase=0.19 elev=-42.0 )
AL_20170101_050237209_000000_44532101    32 stars filter C [ 9211.1s -  9391.1s] expo=180s elev=12.4deg humid= 34% sunelev=-21.9deg (moon at  56.0deg phase=0.19 elev=-41.0 )
AL_20170101_050557819_000000_44532201    25 stars filter C [ 9411.8s -  9591.8s] expo=180s elev=13.0deg humid= 34% sunelev=-21.3deg (moon at  56.0deg phase=0.19 elev=-40.0 )
AL_20170101_050909162_000000_44532201    30 stars filter C [ 9603.1s -  9783.1s] expo=180s elev=13.5deg humid= 34% sunelev=-20.7deg (moon at  56.0deg phase=0.19 elev=-40.0 )
AL_20170101_051220086_000000_44532201    24 stars filter C [ 9794.0s -  9974.0s] expo=180s elev=14.1deg humid= 33% sunelev=-20.1deg (moon at  56.0deg phase=0.19 elev=-39.0 )
AL_20170101_051542227_000000_44532301    34 stars filter C [ 9996.2s - 10176.2s] expo=180s elev=14.7deg humid= 33% sunelev=-19.5deg (moon at  56.0deg phase=0.19 elev=-39.0 )
AL_20170101_051852977_000000_44532301    29 stars filter C [10186.9s - 10366.9s] expo=180s elev=15.3deg humid= 33% sunelev=-19.0deg (moon at  56.0deg phase=0.19 elev=-38.0 )
AL_20170101_052203975_000000_44532301    28 stars filter C [10377.9s - 10557.9s] expo=180s elev=15.9deg humid= 33% sunelev=-18.4deg (moon at  56.0deg phase=0.19 elev=-38.0 )
AL_20170101_052947398_000000_44532501    28 stars filter C [10841.3s - 11021.3s] expo=180s elev=17.3deg humid= 33% sunelev=-17.1deg (moon at  56.0deg phase=0.19 elev=-37.0 )
AL_20170101_053258382_000000_44532501    34 stars filter C [11032.3s - 11212.3s] expo=180s elev=17.8deg humid= 33% sunelev=-16.5deg (moon at  56.0deg phase=0.19 elev=-36.0 )
AL_20170101_053610038_000000_44532501    24 stars filter C [11223.9s - 11403.9s] expo=180s elev=18.4deg humid= 33% sunelev=-16.0deg (moon at  56.0deg phase=0.19 elev=-35.0 )
AL_20170101_053933429_000000_44532601    34 stars filter C [11427.5s - 11607.5s] expo=180s elev=19.0deg humid= 33% sunelev=-15.4deg (moon at  56.0deg phase=0.19 elev=-35.0 )
AL_20170101_054244666_000000_44532601    29 stars filter C [11618.7s - 11798.7s] expo=180s elev=19.6deg humid= 33% sunelev=-14.8deg (moon at  56.0deg phase=0.19 elev=-34.0 )
AL_20170101_054555431_000000_44532601    23 stars filter C [11809.4s - 11989.4s] expo=180s elev=20.2deg humid= 34% sunelev=-14.3deg (moon at  56.0deg phase=0.19 elev=-34.0 )
AL_20170101_054917322_000000_44532701    26 stars filter C [12011.3s - 12191.3s] expo=180s elev=20.8deg humid= 34% sunelev=-13.7deg (moon at  56.0deg phase=0.19 elev=-33.0 )
AL_20170101_055228299_000000_44532701    20 stars filter C [12202.3s - 12382.3s] expo=180s elev=21.3deg humid= 34% sunelev=-13.2deg (moon at  56.0deg phase=0.19 elev=-33.0 )
AL_20170101_055539081_000000_44532701    19 stars filter C [12393.0s - 12573.0s] expo=180s elev=21.9deg humid= 34% sunelev=-12.6deg (moon at  56.0deg phase=0.19 elev=-32.0 )
AL_20170101_055901409_000000_44532801     0 star  filter C [12595.4s - 12775.4s] expo=180s elev=22.5deg humid= 34% sunelev=-12.1deg (moon at  56.0deg phase=0.19 elev=-32.0 )
AL_20170101_060212832_000000_44532801     0 star  filter C [12786.8s - 12966.8s] expo=180s elev=23.1deg humid= 34% sunelev=-11.5deg (moon at  56.0deg phase=0.19 elev=-31.0 )
AL_20170101_060524097_000000_44532801     0 star  filter C [12978.0s - 13158.0s] expo=180s elev=23.7deg humid= 35% sunelev=-11.0deg (moon at  56.0deg phase=0.19 elev=-30.0 )
AL_20170101_060846426_000000_44532901     0 star  filter C [13180.4s - 13360.4s] expo=180s elev=24.3deg humid= 35% sunelev=-10.4deg (moon at  56.0deg phase=0.19 elev=-30.0 )
AL_20170101_061157644_000000_44532901     0 star  filter C [13371.6s - 13551.6s] expo=180s elev=24.8deg humid= 35% sunelev=-9.9deg (moon at  56.0deg phase=0.19 elev=-29.0 )
AL_20170101_061509160_000000_44532901     0 star  filter C [13563.0s - 13743.0s] expo=180s elev=25.4deg humid= 35% sunelev=-9.4deg (moon at  56.0deg phase=0.19 elev=-29.0 )
AL_20170101_061829613_000000_44533001     0 star  filter C [13763.5s - 13943.5s] expo=180s elev=26.0deg humid= 34% sunelev=-8.8deg (moon at  56.0deg phase=0.19 elev=-28.0 )
AL_20170101_062452296_000000_44533001     0 star  filter C [14146.2s - 14326.2s] expo=180s elev=27.2deg humid= 33% sunelev=-7.8deg (moon at  56.0deg phase=0.19 elev=-27.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457754.60141 2017-01-01T02:26:01.824
Decoded useful notice informations.
RA(J2000.0) : 267.1026 17h48m24s6
DEC(J2000.0) : 11.6542 +11d39m15s12
Error radius : 3.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=36.4840722569 lat=19.1962119476
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.139
Assuming Rv=3.1: Av=0.462 Ar=0.373 Ai=0.271 Extinction map E(B-V) from Schlegel:

Field of View is about 67 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 170101: 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 170101 detected by SWIFT
(trigger 729293) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 1.48h after the GRB trigger.
The elevation of the field increased from
1 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2017-01-01T02:26:01.824

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+5323.3s to t0+5503.3s : R > 15.1

The second image is 180.0s exposure in tracking mode:
t0+5514.3s to t0+5694.3s : R > 16.2

We co-added a series of exposures:
t0+5514.3s to t0+6675.9s : R > 17.7
---- YES
We detect a new fading source in the error box given by SWIFT
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 1.48h 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= 36.4841 lat=+19.1962
and the galactic extinction in R band is 0.4 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.