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J/ApJ/642/L99        R-band photometry of GRB 060206            (Wozniak+, 2006)
RAPTOR observations of delayed explosive activity in the high-redshift gamma-ray
burst GRB 060206.
    Wozniak P.R., Vestrand W.T., Wren J.A., White R.R., Evans S.M.,
    Casperson D.
   <Astrophys. J., 642, L99-L102 (2006)>
   =2006ApJ...642L..99W
ADC_Keywords: Gamma rays ; Photometry

Keywords: cosmology: observations - gamma rays: bursts - shock waves


Abstract:
    The Rapid Telescopes for Optical Response (RAPTOR) system at Los
    Alamos National Laboratory observed GRB 060206 starting 48.1min after
    gamma-ray emission triggered the Burst Alert Telescope on board the
    Swift satellite. The afterglow light curve measured by RAPTOR shows a
    spectacular rebrightening by ∼1mag about 1hr after the trigger and
    peaks at R∼16.4mag. Shortly after the onset of the explosive
    rebrightening, the optical transient doubled its flux on a timescale
    of about 4min. The total R-band fluence received from GRB 060206
    during this episode is 2.3x109ergs/cm2. In the rest frame of the
    burst (z=4.045), this yields an isotropic equivalent energy release of
    Eiso∼0.7x1050ergs in just a narrow UV band, λ∼130±22nm.
    We discuss the implications of RAPTOR observations for untriggered
    searches for fast optical transients and studies of GRB environments
    at high redshift.

Description:
    On 2006 February 6, 04:46:53 UT (trigger time, hereafter t=0), the
    Burst Alert Telescope (BAT) instrument of the Swift satellite detected
    GRB 060206 (trigger No. 180455).
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE    Designation(s)
    ----------------------------------------------------------
    13 31 47   +35 04.5    GRB 060206 = XRR 060206
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        16      100   RAPTOR photometry of GRB 060206


Byte-by-byte Description of file: table1.dat

   Bytes Format Units    Label   Explanations

   1-  5  F5.1  min      Time    Time of exposure start (since BAT trigger) (1)
   7- 11  F5.2  mag      Rmag    The R-band magnitude (2)
  13- 16  F4.2  mag      e_Rmag  The 1 σ error in Rmag

Note (1): Time since 2006 February 6, 04:46:53 UT.

Note (2): Our unfiltered magnitudes were transformed to R-band scale
           (Section 3) and were not corrected for extinction (Galactic E(B-V)
           reddening is only 0.018mag; Schlegel et al. 1998ApJ...500..525S).


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    14-May-2008