Exploring the Small Magellanic Cloud to the Faintest X-ray Fluxes: Source Catalog, Timing and Spectral Analysis

Details Exploring the Small Magellanic Cloud to the Faintest X-ray Fluxes: Source Catalog, Timing and Spectral Analysis Exploring the Small Magellanic Cloud to the Faintest X-ray Fluxes: Source Catalog, Timing and Spectral Analysis

2008-09-10

arxiv.org/abs/0809.1738v1

Astronomy and Astrophysics

Astrophysics

Submitted to The Astrophysical Journal. 18 pages, 18 figures, 3 tables. Electronic source catalog is available by request

Scientific paper

We present the results of a pair of 100 ksec Chandra observations in the Small Magellanic Cloud to survey HMXBs, stars and LMXBs/CVs down to L_x = 10^32 erg/s. The two SMC deep-fields are located in the most active star forming region of the bar. Deep Field-1 is positioned at the most pulsar-rich location (identified from previous surveys). Two new pulsars were discovered in outburst: CXO J004929.7-731058 (P=894s), CXO J005252.2-721715 (P=326s), and 14 candidate quiescent pulsars were identified from their timing and spectral properties. Out of 12 previously known pulsars in the fields, 9 were detected, with pulsations seen in five of them. This demonstrates for the first time that a significant fraction (at least 60%) of these systems have appreciable accretion driven X-ray emission during quiescence. Two known pulsars in the field were not detected, with an upper limit of L_x < 5 x 10^32. The full catalog of 394 point-sources is presented along with detailed analyses of timing and spectral properties. Future papers will report associated observations obtained with HST and Magellan to identify optical counterparts.

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