GRB110705_092158_SWIFT at TAROT Calern observatory

TAROT Calern observatory log of images

AL_20110706_013243088_000002_03036301     0 star  filter C [58230.6s - 58290.6s] expo= 60s elev= 1.1deg humid= 45% sunelev=-18.3deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_013323103_000002_03036301     0 star  filter C [58300.6s - 58330.6s] expo= 30s elev= 1.2deg humid= 46% sunelev=-18.2deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_013404104_000002_03036301     0 star  filter C [58341.6s - 58371.6s] expo= 30s elev= 1.3deg humid= 45% sunelev=-18.2deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_013445033_000002_03036301     0 star  filter C [58382.5s - 58412.5s] expo= 30s elev= 1.4deg humid= 45% sunelev=-18.1deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_013526016_000002_03036301     0 star  filter C [58423.5s - 58453.5s] expo= 30s elev= 1.5deg humid= 45% sunelev=-18.1deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_013606751_000002_03036301     0 star  filter C [58464.3s - 58494.3s] expo= 30s elev= 1.7deg humid= 45% sunelev=-18.0deg (moon at 117.0deg phase=0.34 elev=-38.0 )
AL_20110706_014106064_000002_03036401     0 star  filter C [58703.6s - 58793.6s] expo= 90s elev= 2.4deg humid= 44% sunelev=-17.6deg (moon at 117.0deg phase=0.34 elev=-39.0 )
AL_20110706_014247033_000002_03036401     1 star  filter C [58804.5s - 58894.5s] expo= 90s elev= 2.7deg humid= 44% sunelev=-17.5deg (moon at 117.0deg phase=0.34 elev=-39.0 )
AL_20110706_014427767_000002_03036401     0 star  filter R [58905.3s - 58995.3s] expo= 90s elev= 3.0deg humid= 43% sunelev=-17.3deg (moon at 117.0deg phase=0.34 elev=-39.0 )
AL_20110706_014607804_000002_03036401     1 star  filter C [59005.3s - 59095.3s] expo= 90s elev= 3.3deg humid= 43% sunelev=-17.2deg (moon at 117.0deg phase=0.34 elev=-39.0 )
AL_20110706_014748569_000002_03036401     1 star  filter C [59106.1s - 59196.1s] expo= 90s elev= 3.6deg humid= 42% sunelev=-17.0deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_014929288_000002_03036401     1 star  filter R [59206.8s - 59296.8s] expo= 90s elev= 3.9deg humid= 41% sunelev=-16.9deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_015208038_000002_03036501     1 star  filter C [59365.5s - 59455.5s] expo= 90s elev= 4.3deg humid= 42% sunelev=-16.6deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_015348054_000002_03036501     2 stars filter C [59465.6s - 59555.6s] expo= 90s elev= 4.6deg humid= 40% sunelev=-16.4deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_015529045_000002_03036501     1 star  filter R [59566.6s - 59656.6s] expo= 90s elev= 4.9deg humid= 42% sunelev=-16.3deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_015709327_000002_03036501     1 star  filter C [59666.8s - 59756.8s] expo= 90s elev= 5.2deg humid= 43% sunelev=-16.1deg (moon at 117.0deg phase=0.34 elev=-40.0 )
AL_20110706_015849811_000002_03036501     2 stars filter C [59767.3s - 59857.3s] expo= 90s elev= 5.5deg humid= 43% sunelev=-15.9deg (moon at 117.0deg phase=0.34 elev=-41.0 )
AL_20110706_020030561_000002_03036501     1 star  filter R [59868.1s - 59958.1s] expo= 90s elev= 5.8deg humid= 43% sunelev=-15.8deg (moon at 117.0deg phase=0.34 elev=-41.0 )
AL_20110706_020821599_000002_03036601     4 stars filter C [60249.1s - 60429.1s] expo=180s elev= 7.1deg humid= 43% sunelev=-15.1deg (moon at 117.0deg phase=0.34 elev=-41.0 )
AL_20110706_021132334_000002_03036601     3 stars filter C [60439.8s - 60619.8s] expo=180s elev= 7.6deg humid= 44% sunelev=-14.8deg (moon at 117.0deg phase=0.34 elev=-42.0 )
AL_20110706_021442821_000002_03036601     4 stars filter R [60630.3s - 60810.3s] expo=180s elev= 8.2deg humid= 41% sunelev=-14.4deg (moon at 118.0deg phase=0.34 elev=-42.0 )
AL_20110706_021753102_000002_03036601     5 stars filter C [60820.6s - 61000.6s] expo=180s elev= 8.8deg humid= 42% sunelev=-14.1deg (moon at 118.0deg phase=0.34 elev=-42.0 )
AL_20110706_022103867_000002_03036601     5 stars filter C [61011.3s - 61191.3s] expo=180s elev= 9.3deg humid= 40% sunelev=-13.7deg (moon at 118.0deg phase=0.34 elev=-42.0 )
AL_20110706_022414102_000002_03036601     4 stars filter R [61201.6s - 61381.6s] expo=180s elev= 9.9deg humid= 40% sunelev=-13.4deg (moon at 118.0deg phase=0.34 elev=-43.0 )
AL_20110706_022823784_000002_03036701     3 stars filter C [61451.3s - 61631.3s] expo=180s elev=10.6deg humid= 40% sunelev=-12.9deg (moon at 118.0deg phase=0.34 elev=-43.0 )
AL_20110706_023134518_000002_03036701     4 stars filter C [61642.0s - 61822.0s] expo=180s elev=11.2deg humid= 40% sunelev=-12.5deg (moon at 118.0deg phase=0.34 elev=-43.0 )
AL_20110706_023444806_000002_03036701     4 stars filter R [61832.3s - 62012.3s] expo=180s elev=11.8deg humid= 40% sunelev=-12.2deg (moon at 118.0deg phase=0.34 elev=-43.0 )
AL_20110706_023755087_000002_03036701     3 stars filter C [62022.6s - 62202.6s] expo=180s elev=12.3deg humid= 41% sunelev=-11.8deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_024105571_000002_03036701     2 stars filter C [62213.1s - 62393.1s] expo=180s elev=12.9deg humid= 41% sunelev=-11.4deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_024415852_000002_03036701     3 stars filter R [62403.4s - 62583.4s] expo=180s elev=13.5deg humid= 41% sunelev=-11.0deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_024826218_000002_03036801     0 star  filter C [62653.7s - 62833.7s] expo=180s elev=14.2deg humid= 42% sunelev=-10.5deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_025136482_000002_03036801     0 star  filter C [62844.0s - 63024.0s] expo=180s elev=14.8deg humid= 41% sunelev=-10.1deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_025447006_000002_03036801     2 stars filter R [63034.5s - 63214.5s] expo=180s elev=15.3deg humid= 50% sunelev=-9.7deg (moon at 118.0deg phase=0.34 elev=-44.0 )
AL_20110706_025757270_000002_03036801     0 star  filter C [63224.8s - 63404.8s] expo=180s elev=15.9deg humid= 49% sunelev=-9.3deg (moon at 118.0deg phase=0.34 elev=-45.0 )
AL_20110706_030107536_000002_03036801     0 star  filter C [63415.0s - 63595.0s] expo=180s elev=16.5deg humid= 50% sunelev=-8.9deg (moon at 118.0deg phase=0.34 elev=-45.0 )
AL_20110706_030418505_000002_03036801     0 star  filter R [63606.0s - 63786.0s] expo=180s elev=17.0deg humid= 52% sunelev=-8.5deg (moon at 118.0deg phase=0.34 elev=-45.0 )
Informations from GCN notice:
This is a GRB
Date of GRB : 2455747.8896723380 2011-07-05T09:21:07.690
Date of notice : 2455747.8902546298 2011-07-05T09:21:58.000
Refined position : no
RA(J2000.0) : 45.476000 03h01m54s2
DEC(J2000.0) : 2.977000 +02d58m37s19
Error box : x=11:121 y=10:120 (pixels)

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=174.327460 lat=-46.463383
NASA/IPAC-Extragalactic-Database tool for calculate an extinction

Extinction from Schlegel et al. (1998, ApJ 500, 525): E(B-V)=0.109
Assuming Rv=3.1: Av=0.360 Ar=0.290 Ai=0.211 Extinction map E(B-V) from Schlegel:

Field of View is about 105 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 110705: TAROT Calern observatory optical observations
Klotz A. (CESR-OMP), Gendre B. (ASDC),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:

We imaged the field of GRB 110705 detected by SWIFT
(trigger 456659) with the TAROT robotic telescope (D=25cm)
located at the Calern observatory, France.

The observations started 58230.6s after the GRB trigger
(58180.0s after the notice). The elevation of the field increased from
1 degrees above horizon and weather conditions
were XXX.

---- NO
The date of trigger : t0 = 2011-07-05T09:21:07.487

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+58230.6s to t0+58290.6s : R > 15.1

The second image is 30.0s exposure in tracking mode:
t0+58300.6s to t0+58330.6s : R > 16.2

We co-added a series of exposures:
t0+58300.6s to t0+58793.6s : 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 58230.6s 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=174.3275 lat=-46.4634
and the galactic extinction in R band is 0.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.

This message may be cited.