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Letter to the Editor
Detection of the near-infrared counterpart of GRB 971214 3.2 hours after the gamma-ray event *
Castro-Tirado 1, 2,
Received 22 April 1998 / Accepted 27 April 1998
We report the detection of the GRB 971214 counterpart in the near-infrared by means of two images in the -band taken at Calar Alto only 3.5 and 5 hours after the gamma-ray event. We detect the transient at = and = respectively. Our data seem to indicate the existence of a plateau with duration hours (between 3.5 and 10.2 hours after the high-energy event). Moreover the power-law decline should be steeper than the one given by the index . There is also a change in the slope of the broad-band spectrum at some wavelength between the J and bands (possibly around the H-band).
Key words: gamma rays: bursts - methods: observational
* Based on observations carried out at the German-Spanish Astronomical Center, Calar-Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanish National Commission for Astronomy.
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© European Southern Observatory (ESO) 1998
Online publication: June 12, 1998