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This work represent the first major study of the optical and IR characteristics of the mass donor companions to the X-ray pulsars in the Small Magellanic Cloud (SMC). In this work several new counterparts have been identified, and possible…

Astrophysics · Physics 2009-11-10 M. J. Coe , W. R. T. Edge , J. L. Galache , V. A. McBride

In the course of the XMM-Newton survey of the Small Magellanic Cloud (SMC), a region to the east of the emission nebula N19 was observed in November 2009. To search for new candidates for high mass X-ray binaries the EPIC PN and MOS data of…

High Energy Astrophysical Phenomena · Physics 2015-05-27 M. J. Coe , F. Haberl , R. Sturm , W. Pietsch , L. J. Townsend , E. S. Bartlett , M. Filipovic , A. Udalski , R. H. D. Corbet , A. Tiengo , M. Ehle , J. L. Payne , D. Burton

To confirm faint Be/X-ray binary candidates from the XMM-Newton survey of the Small Magellanic Cloud, we searched for X-ray outbursts in archival ROSAT observations. We found that RXJ0123.4-7321 was much brighter when detected with ROSAT…

High Energy Astrophysical Phenomena · Physics 2016-08-31 R. Sturm , F. Haberl , W. Pietsch , A. Udalski

The last comprehensive catalogue of high-mass X-ray binaries in the Small Magellanic Cloud (SMC) was published about ten years ago. Since then new such systems were discovered, mainly by X-ray observations with Chandra and XMM-Newton. For…

Astrophysics of Galaxies · Physics 2016-02-03 Frank Haberl , Richard Sturm

Swift J004929.5-733107 is an X-ray source in the Small Magellanic Cloud (SMC) that has been reported several times, but the optical counterpart has been unclear due to source confusion in a crowded region of the SMC. Previous works proposed…

High Energy Astrophysical Phenomena · Physics 2021-04-21 M. J. Coe , J. A. Kennea , P. A. Evans , L. J. Townsend , A. Udalski , I. M. Monageng , D. A. H. Buckley

Optical and X-ray observations are presented here of a newly reported X-ray transient system in the Small Magellanic Cloud - SXP7.92. A detailed analysis of the X-ray data reveal a coherent period of 7.9s. A search through earlier X-ray…

High Energy Astrophysical Phenomena · Physics 2009-11-13 M. J. Coe , M. Schurch , V. A. McBride , R. H. D. Corbet , L. J. Townsend , A. Udalski , J. L. Galache

We report on a new Be/X-ray pulsar binary located in the Wing of the Small Magellanic Cloud (SMC). The strong pulsed X-ray source was discovered with the Chandra and XMM-Newton X-ray observatories. The X-ray pulse period of 1062 s is…

Solar and Stellar Astrophysics · Physics 2015-06-03 V. Hénault-Brunet , L. M. Oskinova , M. A. Guerrero , W. Sun , Y. -H. Chu , C. J. Evans , J. S. Gallagher , R. A. Gruendl , J. Reyes-Iturbide

Located in the Small Magellanic Cloud (SMC), SXP214 is an X-ray pulsar in a high mass X-ray binary system with a Be-star companion. A recent survey of the SMC under a Chandra X-ray Visionary program found the source in a transition when the…

An XMM-Newton target of opportunity observation of the field around the transient 18.37 s pulsar XTE J0055-727 in the Small Magellanic Cloud (SMC) revealed two bright, long-period X-ray pulsars in the EPIC data. A new pulsar, XMMU…

Astrophysics · Physics 2009-11-10 F. Haberl , W. Pietsch , N. Schartel , P. Rodriguez , R. H. D. Corbet

We present a large sample (20 in total) of optical spectra of Small Magellanic Cloud (SMC) High-Mass X-ray Binaries obtained with the 2dF spectrograph at the Anglo-Australian Telescope. All of these sources are found to be Be/X-ray binaries…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Vallia Antoniou , Despina Hatzidimitriou , Andreas Zezas , Pablo Reig

On MJD 56590-1 (2013 Oct 25-26) observations of the Magellanic Clouds by the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) observatory discovered a previously-unreported bright, flaring X-ray source. This source was initially…

High Energy Astrophysical Phenomena · Physics 2015-06-23 M. J. Coe , E. S. Bartlett , A. J. Bird , F. Haberl , J. A. Kennea , V. A. McBride , L. J. Townsend , A. Udalski

The X-ray binary population of the Small Magellanic Cloud (SMC) contains a large number of massive X-ray binaries and the recent survey of the SMC by XMM-Newton has resulted in almost 50 more tentative high mass X-ray binary candidates.…

Results of a 4 year monitoring campaign of the SMC using the Rossi X-ray timing Explorer (RXTE) are presented. This large dataset makes possible detailed investigation of a significant sample of SMC X-ray binaries. 8 new X-ray pulsars were…

Astrophysics · Physics 2009-11-10 S. Laycock , R. H. D. Corbet , M. J. Coe , F. E. Marshall , C. Markwardt , J. Lochner

SXP 15.3 and SXP 305 are two Be X-ray binaries in the Small Magellanic Cloud that are spatially separated by ~7 arcsec. The small separation between these sources has, in the past, resulted in confusion about the origin of the emission from…

We report the discovery of LXP169, a new high-mass X-ray binary (XRB) in the LMC. The optical counterpart has been identified and appears to exhibit an eclipsing light curve. We performed follow-up observations to clarify the eclipsing…

High Energy Astrophysical Phenomena · Physics 2015-06-15 P. Maggi , F. Haberl , R. Sturm , W. Pietsch , A. Rau , J. Greiner , A. Udalski , M. Sasaki

The Magellanic Clouds host a large population of high-mass X-ray binary (HMXB) systems, but although the Large Magellanic Cloud (LMC) is an order of magnitude more massive than the Small Magellanic Cloud, significantly fewer HMXBs are…

Solar and Stellar Astrophysics · Physics 2022-06-08 F. Haberl , C. Maitra , G. Vasilopoulos , P. Maggi , A. Udalski , I. M. Monageng , D. A. H. Buckley

We present simultaneous, multi-wavelength observations of the Small Magellanic Cloud Be/XRB IGR J01217-7257 (=SXP 2.16) during outbursts in 2014, 2015 and 2016. We also present the results of RXTE observations of the Small Magellanic Cloud…

High Energy Astrophysical Phenomena · Physics 2017-01-18 C. M. Boon , A. J. Bird , M. J. Coe , R. H. D. Corbet , P. A. Evans , J. A. Kennea , H. A. Krimm , S. G. T. Laycock , A. Udalski

The Small Magellanic Cloud (SMC) is well known to harbor a large number of High-Mass X-ray Binaries (HMXBs). The identification of their optical counterparts provides information on the nature of the donor stars and can help to constrain…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Grigoris Maravelias , Andreas Zezas , Vallia Antoniou , Despoina Hatzidimitriou

To investigate candidates for Be/X-ray binaries in the Small Magellanic Cloud (SMC), we observed a region around the emission nebula N19 with XMM-Newton in October 2006. We analysed the EPIC data of the detected point sources to derive…

Astrophysics · Physics 2009-11-13 F. Haberl , P. Eger , W. Pietsch , R. H. D. Corbet , M. Sasaki

Analysis of the longterm photometric variability of 7 Be/X-ray-pulsar systems in the Small Magellanic Cloud has been carried out. We find a variety of types of variability are present, including: longterm irregular changes, periodic orbital…

Astrophysics · Physics 2008-11-26 P. C. Schmidtke , A. P. Cowley