1995A&A...300..399L

Query : 1995A&A...300..399L

1995A&A...300..399L - Astronomy and Astrophysics, volume 300399-402 (1995/8-2)

Observations of the binary accreting pulsar Vela X-1 with the SIGMA telescope.

LAURENT P., PAUL J., DENIS M., BALLET J., SCHMITZ-FRAYSSE M.C., OLIVE J.F., BOUCHET L., ROQUES J.P., SUNYAEV R., CHURAZOV E., GILFANOV M., KHAVENSON N., DYACHKOV A., NOVIKOV B., CHULKOV I. and SUKHANOV K.

Abstract (from CDS):

The high mass binary pulsar Vela X-1 has been observed 15 times by the SIGMA imaging telescope during 1990-1994. The source reached a maximum luminosity in the 30-60keV range of 8x1035erg/s (assuming d=2kpc) during a flare lasting 6 hours on June 1st, 1992. Periodic flux variations with a period of nearly 284s. have been detected during this flare. By summing all the observations, we have also detected the source with a 30-60keV luminosity of 1035erg/s. The spectrum recorded during the two states are both well fitted by a power law of index -3.5 between 30 and 60keV.

Abstract Copyright: ∼

Journal keyword(s): X-rays: stars - cosmology: observations - pulsars: individual: Vela X-1

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V635 Cas HXB 01 18 31.9704955824 +63 44 33.072603144 17.05 16.64 15.19 14.34 13.22 B0.2Ve 791 0
2 V* GP Vel HXB 09 02 06.8608812864 -40 33 16.899168060 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1588 0
3 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 719 1

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