GRB160401_202043_INTEGRAL at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20160401_202105004_000000_00000001     0 star  filter C [   18.9s -    78.9s] expo= 60s elev=44.4deg humid= 75% sunelev=-24.7deg (moon at 151.0deg phase=0.42 elev=-56.0 )
AL_20160401_202915554_000003_62569301     0 star  filter C [  417.5s -   507.5s] expo= 90s elev=43.2deg humid= 74% sunelev=-25.7deg (moon at 151.0deg phase=0.42 elev=-55.0 )
AL_20160401_203056976_000003_62569301     0 star  filter C [  518.9s -   608.9s] expo= 90s elev=42.9deg humid= 73% sunelev=-25.9deg (moon at 151.0deg phase=0.42 elev=-55.0 )
AL_20160401_203237978_000003_62569301     0 star  filter C [  619.9s -   709.9s] expo= 90s elev=42.6deg humid= 72% sunelev=-26.2deg (moon at 151.0deg phase=0.42 elev=-54.0 )
AL_20160401_203424290_000003_62569401     0 star  filter C [  726.2s -   816.2s] expo= 90s elev=42.2deg humid= 73% sunelev=-26.4deg (moon at 151.0deg phase=0.42 elev=-54.0 )
AL_20160401_203605931_000003_62569401     0 star  filter C [  827.9s -   917.9s] expo= 90s elev=41.9deg humid= 72% sunelev=-26.7deg (moon at 151.0deg phase=0.42 elev=-54.0 )
AL_20160401_203746243_000003_62569401     0 star  filter C [  928.2s -  1018.2s] expo= 90s elev=41.6deg humid= 71% sunelev=-26.9deg (moon at 151.0deg phase=0.42 elev=-54.0 )
AL_20160401_203943696_000003_62569501     0 star  filter C [ 1045.6s -  1135.6s] expo= 90s elev=41.3deg humid= 71% sunelev=-27.2deg (moon at 151.0deg phase=0.42 elev=-53.0 )
AL_20160401_204123978_000003_62569501     0 star  filter C [ 1145.9s -  1235.9s] expo= 90s elev=41.0deg humid= 71% sunelev=-27.4deg (moon at 151.0deg phase=0.42 elev=-53.0 )
AL_20160401_204304283_000003_62569501     0 star  filter C [ 1246.2s -  1336.2s] expo= 90s elev=40.7deg humid= 70% sunelev=-27.7deg (moon at 151.0deg phase=0.42 elev=-53.0 )
AL_20160401_204451314_000003_62569601     0 star  filter C [ 1353.2s -  1443.2s] expo= 90s elev=40.3deg humid= 70% sunelev=-27.9deg (moon at 151.0deg phase=0.42 elev=-53.0 )
AL_20160401_204632267_000003_62569601     0 star  filter C [ 1454.2s -  1544.2s] expo= 90s elev=40.0deg humid= 70% sunelev=-28.1deg (moon at 151.0deg phase=0.42 elev=-52.0 )
AL_20160401_204814423_000003_62569601     0 star  filter C [ 1556.3s -  1646.3s] expo= 90s elev=39.7deg humid= 69% sunelev=-28.4deg (moon at 151.0deg phase=0.42 elev=-52.0 )
AL_20160401_205231486_000003_62569701     0 star  filter C [ 1723.4s -  1903.4s] expo=180s elev=39.1deg humid= 67% sunelev=-28.8deg (moon at 151.0deg phase=0.42 elev=-52.0 )
AL_20160401_205541766_000003_62569701     0 star  filter C [ 1913.7s -  2093.7s] expo=180s elev=38.5deg humid= 67% sunelev=-29.2deg (moon at 151.0deg phase=0.42 elev=-51.0 )
AL_20160401_205852548_000003_62569701     0 star  filter R [ 2104.5s -  2284.5s] expo=180s elev=37.9deg humid= 65% sunelev=-29.6deg (moon at 151.0deg phase=0.42 elev=-51.0 )
AL_20160401_210107673_000003_62569801     0 star  filter C [ 2316.8s -  2496.8s] expo=180s elev=37.3deg humid= 65% sunelev=-30.1deg (moon at 151.0deg phase=0.42 elev=-50.0 )
AL_20160401_220048228_000000_17799501     0 star  filter C [ 5819.9s -  5999.9s] expo=180s elev=26.8deg humid= 62% sunelev=-36.6deg (moon at 150.0deg phase=0.41 elev=-41.0 )
AL_20160401_220359221_000000_17799501     0 star  filter C [ 6011.2s -  6191.2s] expo=180s elev=26.3deg humid= 62% sunelev=-36.9deg (moon at 150.0deg phase=0.41 elev=-41.0 )
AL_20160401_220711127_000000_17799501     0 star  filter R [ 6203.1s -  6383.1s] expo=180s elev=25.7deg humid= 62% sunelev=-37.2deg (moon at 150.0deg phase=0.41 elev=-40.0 )
AL_20160401_221028393_000000_17799601     0 star  filter C [ 6400.3s -  6580.3s] expo=180s elev=25.1deg humid= 62% sunelev=-37.5deg (moon at 150.0deg phase=0.41 elev=-40.0 )
AL_20160401_221338674_000000_17799601     0 star  filter C [ 6590.6s -  6770.6s] expo=180s elev=24.6deg humid= 60% sunelev=-37.8deg (moon at 150.0deg phase=0.41 elev=-39.0 )
AL_20160401_221649423_000000_17799601     0 star  filter R [ 6781.3s -  6961.3s] expo=180s elev=24.0deg humid= 61% sunelev=-38.0deg (moon at 150.0deg phase=0.41 elev=-38.0 )
AL_20160401_222021517_000000_17799701     0 star  filter C [ 6993.4s -  7173.4s] expo=180s elev=23.4deg humid= 61% sunelev=-38.3deg (moon at 150.0deg phase=0.41 elev=-38.0 )
AL_20160401_222332251_000000_17799701     0 star  filter C [ 7184.2s -  7364.2s] expo=180s elev=22.9deg humid= 61% sunelev=-38.5deg (moon at 150.0deg phase=0.41 elev=-37.0 )
AL_20160401_222629184_000000_17799701     0 star  filter R [ 7375.4s -  7555.4s] expo=180s elev=22.3deg humid= 61% sunelev=-38.8deg (moon at 150.0deg phase=0.41 elev=-37.0 )
Informations from GCN notice:
This is a GRB
Date of the alert : 2457480.34772 2016-04-01T20:20:43.008
Decoded useful notice informations.
RA(J2000.0) : 89.7375328169 05h58m57s0
DEC(J2000.0) : 26.6757858294 +26d40m32s82
Error radius : 2.0 arcmin

Other pages about TAROT Calern observatory observations

Sum of images.
Differential photometry.

Galactic coordinates

Galactic coordinates : lon=183.441213416 lat=1.39674348651
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=1.390
Assuming Rv=3.1: Av=4.606 Ar=3.714 Ai=2.696 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 160401: 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 160401 detected by INTEGRAL
(trigger 7437) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 18.9s after the GRB trigger
(14.5s after the notice). The elevation of the field decreased from
44 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2016-04-01T20:20:43.008

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+18.9s to t0+78.9s : R > 15.1

The second image is 90.0s exposure in tracking mode:
t0+417.5s to t0+507.5s : R > 16.2

We co-added a series of exposures:
t0+417.5s to t0+1018.2s : 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 18.9s 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=183.4412 lat= +1.3967
and the galactic extinction in R band is 3.7 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.