BEPPOSAX OBSERVATIONS OF THE EXOTIC BLACK-HOLE CANDIDATE GX 339-4

Authors
CHIAPPETTI L HAARDT F TREVES A RICCI D SANTANGELO A MEREGHETTI S BELLONI T
Citation
L. Chiappetti et al., BEPPOSAX OBSERVATIONS OF THE EXOTIC BLACK-HOLE CANDIDATE GX 339-4, Nuclear physics. B, Proceedings supplement, 69(1-3), 1999, pp. 340-343
Citations number
5
Categorie Soggetti
Physics, Particles & Fields
Journal title
Nuclear physics. B, Proceedings supplement → ACNP
ISSN journal
09205632
Volume
69
Issue
1-3
Year of publication
1999
Pages
340 - 343
Database
ISI
SICI code
0920-5632(1999)69:1-3<340:BOOTEB>2.0.ZU;2-Q
Abstract
GX 339-4 has been observed by BeppoSAX twice in spring 1997 as part of a longer monitoring program. The source was close to the highest leve ls (50 mCrab) of the extended low state (as measured by the XTE ASM du ring the last 2 years). Its spectrum was quite hard, similar to the Ex osat 1984 off state, but 40 times stronger. The source is detected up to more than 120 keV, enabling the possibility to study its high energ y spectrum.