2015ApJ...803L..27B


Query : 2015ApJ...803L..27B

2015ApJ...803L..27B - Astrophys. J., 803, L27 (2015/April-3)

Identification of the high-energy gamma-ray source 3FGL J1544.6-1125 as a transitional millisecond pulsar binary in an accreting state.

BOGDANOV S. and HALPERN J.P.

Abstract (from CDS):

We present X-ray, ultraviolet, and optical observations of 1RXS J154439.4-112820, the most probable counterpart of the unassociated Fermi-LAT source 3FGL J1544.6-1125. The optical data reveal rapid variability, which is a feature of accreting systems. The X-rays exhibit large-amplitude variations in the form of fast switching (within ∼10 s) between two distinct flux levels that differ by a factor of ≈10. The detailed optical and X-ray behavior is virtually identical to that seen in the accretion-disk-dominated states of the transitional millisecond pulsar (MSP) binaries PSR J1023+0038 and XSS J12270-4859, which are also associated with γ-ray sources. Based on the available observational evidence, we conclude that 1RXS J154439.4-112820 and 3FGL J1544.6-1125 are the same object, with the X-rays arising from intermittent low-luminosity accretion onto an MSP and the γ-rays originating from an accretion-driven outflow. 1RXS J154439.4-112820 is only the fourth γ-ray-emitting low-mass X-ray binary system to be identified and is likely to sporadically undergo transformations to a non-accreting rotation-powered pulsar system.

Abstract Copyright:

Journal keyword(s): gamma rays: stars - pulsars: general - stars: neutron - X-rays: binaries

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 PSR J1023+0038 Psr 10 23 47.6841824712 +00 38 41.005893516     17.31     GV 403 0
2 XSS J12270-4859 Psr 12 27 58.7476831464 -48 53 42.824592960           ~ 274 0
3 2FGL J1417.5-4404 LXB 14 17 16.80 -44 04 40.5           ~ 50 0
4 1FGL J1544.5-1127 Psr 15 44 14.33 -11 24 42.0           ~ 57 0
5 1RXS J154439.4-112820 X 15 44 39.4 -11 28 20           ~ 27 0
6 IGR J18245-2452 LXB 18 24 32.50 -24 52 07.8           ~ 224 0
7 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 776 0

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