[vsnet-grb-info 6769] GRB 080430: optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  8368
SUBJECT: GRB 080430: optical observations 
DATE:    08/10/13 15:39:36 GMT
FROM:    Graziella Pizzichini at IASF/CNR,Bologna  <pizzichini at iasfbo.inaf.it>

    F. Terra (Second University of Roma "Tor Vergata"),  F. Munz (INAF/IASF
    Bologna) G. Greco, C. Bartolini, A. Guarnieri,A. Piccioni (Bologna
    University), D. Nanni (INAF/OAR and Second University of Rome "Tor
    Vergata"), G. Pizzichini(INAF/IASF Bologna),  S. Galetti and S. Bernabei
    (Bologna Observatory) report:

    During the night between 08/04/30 and 080501 we observed the OT of
    GRB080430 (Guidorzi et al., GCN 7647, Klotz, Boer & Atteia, GCN 7646)
    in Rc, V, B AND I  with the 1.52  cm telescope of the Bologna Observatory
    in Loiano in good weather conditons, airmass  between 1 and 1.6,
    seeing less than 4".
    Calibration was obtained from the NOMAD catalog in the Rc filter and from
    the SDSS observations by Cool et al. in GCN 7649 for the other filters.
    We obtain the following magnitudes
    obs midpoint      duration filter mag   error
                       seconds
    2454587.40325        600     Rc  19,47  0,11
    2454587.41120        600     V   19,20  0.12
    2454587.42067        600     Rc  19,75  0,11
    2454587.43274       1200     B   19,54  0,12
    2454587.44788        600     Rc  19,60  0,15
    2454587.45720        600     I   19,03  0,05
    2454587.46673        600     Rc  19,75  0,11
    2454587.47927        600     V   19,44  0,12
    2454587.48806        600     Rc  19,96  0,10
    2454587.51098        600     Rc  20,28  0,09
    2454587.52303        600     Rc  20,01  0,09
    2454587.53175        600     Rc  20,27  0,15
    2454587.53946        600     I   19,14  0,06
    2454587.54819        600     Rc  20,53  0,10

    Our  images have been posted in our public directory
    from where they can be retrieved by sftp using
    hostname: ermione.bo.astro.it
    username: publicGRB
    password: GRB_bo
    directory: /home/publicGRB/GRB080430/