Sursauts gamma

GRB 160313A

TITLE: GCN CIRCULAR
NUMBER: 19179
SUBJECT: GRB 160313A: Chante-Perdrix Observatory optical observations
DATE: 16/03/13 19:21:44 GMT
FROM: Alain Klotz at IRAP-CNRS-OMP <Alain.Klotz@free.fr>

Kugel F., Rinner C. (Observatoire Chante-Perdrix, Dauban),
and Klotz A. (CNRS-OMP-IRAP) report:

F. Kugel imaged the field of GRB 160313A detected by SWIFT
(trigger 678929) with the D=40cm F/D=3 telescope
located at the Observatoire Chante-Perdrix, Dauban,
France (IAU station A77). The CCD camera is
ARTEMIS ATIK-460ex, no optical filter is used.

The observations started 17.4 min after the GRB trigger.

The first image is 60 second exposure.
No optical transcient is detected in the XRT
error box published by Goad et al. (GCNC 19174).
Next images are co-added:

t1(min) t2(min) Rmag_lim
17.4 18.4 19.5
17.4 42.4 20.0

Magnitudes were estimated with nearby USNO-B1 stars
and are not corrected for galactic dust extinction.

Lien : http://www.mpe.mpg.de/~jcg/grb160313A.html

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GRB 161214B

TITLE:   GCN CIRCULAR
NUMBER:  20262
SUBJECT: GRB 161214B: Chante-perdrix observatory optical observations
DATE:    16/12/14 23:41:41 GMT
FROM:    Alain Klotz at IRAP-CNRS-OMP  <Alain.Klotz@free.fr>

Kugel F. (Chante-perdrix observatory) report:

We imaged the field of GRB 161214B detected by SWIFT
(trigger 726885) with a 400 mm telescope (F/D=3)
located at the Chante-perdrix observatory, France (IAU A77).
The CCD camera is an Atik 460EX unfiltered.

We detect the same star as Malesani et al. (GCNC 20260).
A first series images show the star 0.7 magnitude
brighter than measured in later images:

t0 +   8.1 min to t0 +  20.1 min : R = 17.2 +/- 0.3
t0 + 106.6 min to t0 + 128.6 min : R = 17.9 +/- 0.3
t0 + 131.1 min to t0 + 153.1 min : R = 17.9 +/- 0.3

Magnitudes were estimated with the nearby USNO-SA stars
and are not corrected for galactic dust extinction.

Full report :  http://www.mpe.mpg.de/~jcg/grb161214B.html