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| Query : 1999ApJ...523..197K |
1999ApJ...523..197K - Astrophys. J., 523, 197-202 (1999/September-3)
Discovery of a hard X-ray source, SAX J0635+0533, in the error box of the gamma-ray source 2EG 0635+0521.
KAARET P., PIRAINO S., HALPERN J. and ERACLEOUS M.
Abstract (from CDS):
We have discovered an X-ray source, SAX J0635+0533, with a hard spectrum within the error box of the GeV gamma-ray source in Monoceros, 2EG J0635+0521. The unabsorbed flux from the source is 1.2x10–11 ergs.cm–2.s–1 in the 2-10 keV band. The X-ray spectrum is consistent with a simple power-law model with absorption. The photon index is 1.50±0.08, and we detect emission out to 40 keV. Optical observations identify a counterpart with a V magnitude of 12.8. The counterpart has broad emission lines and the colors of an early B-type star. If the identification of the X-ray/optical source with the gamma-ray source is correct, then the source would be a gamma-ray-emitting X-ray binary.
Abstract Copyright: ∼
Journal keyword(s): Gamma Rays: Observations - Stars: Pulsars: General - stars: individual (2CG 135+01, 2EG J0635+0521, LS I +61 303, PSR J1259-63 (read: PSR B1259-63), SAX J0635+0533 (read: SAX J0635.2+0533)) - Stars: Neutron
Simbad objects: 8
| Number of rows : 8 |
| 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 | LS I +61 303 | HXB | 02 40 31.6644419688 | +61 13 45.593918580 | 11.27 | 11.61 | 10.75 | 10.19 | 9.55 | B0Ve | 903 | 2 |
| 2 | HD 245770 | HXB | 05 38 54.5748918624 | +26 18 56.836952784 | 9.30 | 9.84 | 9.39 | 8.77 | 8.30 | O9/B0III/Ve | 1045 | 0 |
| 3 | NAME Rosette OB Association | As* | 06 31.7 | +04 58 | ~ | 148 | 0 | |||||
| 4 | HD 259440 | HXB | 06 32 59.2566076656 | +05 48 01.160755848 | 9.17 | 9.63 | 9.15 | B0pe | 256 | 0 | ||
| 5 | EM* GGA 401 | HXB | 06 35 18.2797640568 | +05 33 06.274961892 | 13.769 | 12.837 | 12.512 | B2V-B1IIIe | 60 | 0 | ||
| 6 | NAME MONOCEROS NEB | SNR | 06 38 43 | +06 30.2 | ~ | 264 | 0 | |||||
| 7 | V* V779 Cen | HXB | 11 21 15.0920532528 | -60 37 25.630264596 | 14.4 | 12.27 | O9III/Veq | 1159 | 0 | |||
| 8 | CPD-63 2495 | HXB | 13 02 47.6544015048 | -63 50 08.626970292 | 10.34 | 10.72 | 9.98 | 10.03 | O9.5Ve | 852 | 0 |
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