Hostname: page-component-76fb5796d-9pm4c Total loading time: 0 Render date: 2024-04-27T02:11:11.724Z Has data issue: false hasContentIssue false
  • English
  • Français

Discovery of a New X-ray Transient in Scorpius GRO J1655-40 ≡ X-ray Nova Scorpii 1994

Published online by Cambridge University Press:  25 May 2016

W.S. Paciesas ,
S.N. Zhang ,
B.C. Rubin ,
B.A. Harmon ,
C.A. Wilson  and
G.J. Fishman
W.S. Paciesas
Affiliation:
University of Alabama in Huntsville, Huntsville, AL 35899 USA
S.N. Zhang
Affiliation:
Universities Space Research Association, Huntsville, AL 35806 USA
B.C. Rubin
Affiliation:
Universities Space Research Association, Huntsville, AL 35806 USA
B.A. Harmon
Affiliation:
NASA/Marshall Space Flight Center, Huntsville, AL 35812 USA
C.A. Wilson
Affiliation:
NASA/Marshall Space Flight Center, Huntsville, AL 35812 USA
G.J. Fishman
Affiliation:
NASA/Marshall Space Flight Center, Huntsville, AL 35812 USA

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

A bright transient X-ray source, GRO J1655-40 (X-ray Nova Scorpii 1994) was discovered with BATSE (the Burst and Transient Source Experiment) in late July 1994. More recently, the source also became a strong radio emitter, its rise in the radio being approximately anti-correlated with a decline in the hard X-ray intensity. High-resolution radio observations subsequent to this symposium showed evidence for superluminally expanding jets. Since the hard X-ray emission extends to at least 200 keV and we find no evidence of pulsations, we tentatively classify the source as a black-hole candidate. However, its hard X-ray spectrum is unusually steep (power-law photon index α ≃ −3) relative to most other black-hole candidates. In this regard, it resembles GRS 1915+105, the first galactic source to show superluminal radio jets.

Type
5 X-ray Binaries
Information
Symposium - International Astronomical Union , Volume 165: Compact Stars in Binaries , 1996 , pp. 363 - 367
Copyright
Copyright © Kluwer 1996 

References

Bailyn, C., Jogee, S. & Orosz, J. 1994, IAU Circ. 6050.Google Scholar
Bailyn, C. et al. 1995, Nat (in press).Google Scholar
Campbell-Wilson, D. & Hunstead, R. 1994a, IAU Circ. 6052.Google Scholar
Campbell-Wilson, D. & Hunstead, R. 1994b, IAU Circ. 6055.Google Scholar
Crary, D. et al. 1995, (in preparation).Google Scholar
Della Valle, M. 1994, IAU Circ. 6052.Google Scholar
Harmon, B.A. et al. 1994, in The Second Compton Symposium , Fichtel, C.E., Gehrels, N. & Norris, J.P. (Eds.), AIP Conf. Proc. 304, p. 210.Google Scholar
Harmon, B.A. et al. 1995, Nat (in press).Google Scholar
Hjellming, R.M. 1994a, IAU Circ. 6055.Google Scholar
Hjellming, R.M. 1994b, IAU Circ. 6060.Google Scholar
Hjellming, R.M. & Rupen, M. 1994a, IAU Circ. 6073.Google Scholar
Hjellming, R.M. & Rupen, M. 1994b, IAU Circ. 6077.Google Scholar
Hjellming, R.M. & Rupen, M. 1994c, IAU Circ. 6086.Google Scholar
Hjellming, R.M. & Rupen, M. 1994d, IAU Circ. 6107.Google Scholar
Hjellming, R.M. & Rupen, M. 1995, Nat (in press).Google Scholar
Hunstead, R. et al. 1994, IAU Circ. 6062.Google Scholar
Hunstead, R. et al. 1995, these Proceedings.Google Scholar
Kroeger, R.A. et al. 1994, IAU Circ. 6051.Google Scholar
McKay, D. & Kesteven, M. 1994, IAU Circ. 6062.Google Scholar
Mirabel, I.F. & Rodriguez, L.F. 1994, Nat 371, 46.Google Scholar
Paciesas, W.S. et al. 1994, IAU Circ. 6075.Google Scholar
Paciesas, W.S. et al. 1995, in The Gamma-Ray Sky with COMPTON/GRO and SIGMA , Signore, M., Salati, P. & Vedrenne, G. (Eds.), Kluwer Academic Publishers (Dordrecht), (in press).Google Scholar
Reynolds, J. & Jauncey, D. 1994, IAU Circ. 6063.Google Scholar
Sunyaev, R.A. et al. 1991, SvAL 17, 409.Google Scholar
Tingay, S.J. et al. 1995, Nat 374, 141.Google Scholar
Wilson, C.A. et al. 1994, IAU Circ. 6056.Google Scholar
Zhang, S.N. et al. 1993, Nat 366, 245.Google Scholar
Zhang, S.N. et al. 1994a, IAU Circ. 6046.Google Scholar
Zhang, S.N. et al. 1994b, IAU Circ. 6101.Google Scholar
Zhang, S.N. et al. 1994c, IAU Circ. 6106.Google Scholar