Discovery with the Sigma telescope of hard X-rays from the globular cluster Terzan 2

Abstract

view Abstract Citations (65) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Discovery with the Sigma Telescope of Hard X-Rays from the Globular Cluster Terzan 2 Barret, D. ; Mereghetti, S. ; Roques, J. P. ; Mandrou, P. ; Salotti, L. ; Lebrun, F. ; Laurent, Ph. ; Ballet, J. ; Churazov, E. ; Gifanov, M. ; Sunyaev, R. ; Khavenson, N. ; Chulkov, I. ; Novikov, B. ; Kuznetzov, A. ; Dyachkov, A. Abstract During the survey of the Galactic center performed with the Sigma hard X-ray/soft gamma-ray telescope, a new source has been discovered in the 35-200 keV energy range. The location of the source is consistent with the position of the globular cluster Terzan 2. It is suggested that the hard X-rays emission originates in X1724-308 (4U 1724-30), a source of X-ray bursts located in the globular cluster. Under this assumption, it would be the first detection of a low-mass X-ray binary in this energy range. Publication: The Astrophysical Journal Pub Date: September 1991 DOI: 10.1086/186144 Bibcode: 1991ApJ...379L..21B Keywords: Globular Clusters; X Ray Binaries; Black Holes (Astronomy); Emission Spectra; Neutron Stars; Telescopes; Astrophysics; CLUSTERS: GLOBULAR; STARS: INDIVIDUAL ALPHANUMERIC: X1323-619; X-RAYS: BINARIES; X-RAYS: SOURCES full text sources ADS | data products SIMBAD (9)