Testing for synchrotron self-absorption in GRB 970111
Abstract
The time-resolved spectra of several gamma-ray bursts have shown that near the beginning of the burst, some absorption mechanism makes the spectra inconsistent with the simple optically-thin synchrotron shock model. We fit GRB 970111, which shows strong evidence for such absorption, with a synchrotron shock spectra suffering self-absorption. The synchrotron self-absorption shape does fit the BATSE time-evolving spectra, although it may be inconsistent with BeppoSAX WFC data. If the turnover just below the spectral break is due to synchrotron self-absorption, a magnetic field strength of 4 \ 10(7) G is required.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- September 1999
- DOI:
- 10.1051/aas:1999286
- Bibcode:
- 1999A&AS..138..405C
- Keywords:
-
- GAMMA-RAYS: BURSTS;
- GAMMA-RAYS: OBSERVATIONS;
- RADIATION MECHANISMS: NON-THERMAL;
- TECHNIQUES: SPECTROSCOPIC