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INTEGRAL observations of the Small Magellanic Cloud
V. A. McBride, M. J. Coe, A. J. Bird +10
The first INTEGRAL observations of the Small Magellanic Cloud (carried out in 2003) are reported in which two sources are clearly detected. The first source, SMC X-1, shows a hard…
XTE J1739-302 as a Supergiant Fast X-ray Transient
D. M. Smith, W. A. Heindl, C. B. Markwardt +4
XTE J1739-302 is a transient X-ray source with unusually short outbursts, lasting on the order of hours. Here we give a summary of X-ray observations we have made of this object in…
Discovery of the optical counterpart to the X-ray pulsar SAX J2103.5+4545
P. Reig, I. Negueruela, J. Fabregat +3
We report optical and infrared photometric and spectroscopic observations that identify the counterpart to the 358.6-s X-ray transient pulsar SAX J2103.5+4545 with a moderately red…
Highlights from XMM-Newton
X. Barcons, I. Negueruela
The launch of the Chandra (NASA) and XMM-Newton (ESA) X-ray observatories in 1999 has revolutionized our view of the Universe, by providing astrophysical information about many cla…
The IR counterpart to the Anomalouos X-ray Pulsar 1RXS J1708-4009
G. L. Israel, S. Covino, R. Perna +10
We report the discovery of the likely IR counterpart to the Anomalous X-ray Pulsar (AXP) 1RXS J1708-4009, based on the combination of Chandra HRC-I X-ray position, and deep optical…
The detection of variability from the candidate IR counterpart to the Anomalous X-ray Pulsar 1E1048.1-5937
G. L. Israel, S. Covino, L. Stella +9
We report on the detection of variability from the proposed IR counterpart to the Anomalous X-ray Pulsar (AXP) 1E1048.1-5937 based on Chandra and ESO optical/IR deep observations c…
The identification of the optical/IR counterpart of the 15.8-s transient X-ray pulsar XTE J1946+274
F. Verrecchia, G. L. Israel, I. Negueruela +7
We report on the discovery of the optical/IR counterpart of the 15.8s transient X-ray pulsar XTE J1946+274. We re-analysed archival BeppoSAX observations of XTE J1946+274, obtainin…
Observations of the unusual counterpart to the X-ray pulsar AX J0051-733
M. J. Coe, N. J. Haigh, S. G. T. Laycock +2
We report optical and IR observations of the ASCA X-ray pulsar system AX J0051-733. The relationship between the X-ray source and possible optical counterparts is discussed. Long t…
Pulsations and orbital modulation of the intermediate polar 1WGA J1958.2+3232
A. J. Norton, H. Quaintrell, S. Katajainen +3
We present optical photometry, spectroscopy and photopolarimetry, as well as ASCA X-ray observations, of the recently discovered intermediate polar 1WGA J1958.2+3232. Through the f…
Optical studies of two LMC X-ray transients : RX J0544.1-7100 and RX J0520.5-6932
M. J. Coe, I. Negueruela, D. A. H. Buckley +2
We report observations which confirm the identities of the optical counterpart to the transient sources RX J0544.1-7100 and RX J0520.5-6932. The counterparts are suggested to be a…
The Be/X-ray binary LS 992/RX J0812.4-3114: physical parameters and long-term variability
P. Reig, I. Negueruela, D. A. H. Buckley +3
We present the first long-term optical and infrared study of the optical counterpart to the source RX J0812.4-3114, an X-ray pulsar with a Be type companion. During the period cove…
A representative sample of Be Stars I: Sample Selection, Spectral Classification and Rotational Velocities
I. A. Steele, I. Negueruela, J. S. Clark
We present a sample of 58 Be stars containing objects of spectral types O9 to B8.5 and luminosity classes III to V. We have obtained 3670 - 5070 Angstrom spectra of the sample whic…
The distances to the X-ray binaries LSI +61 303 and A0535+262
I. A. Steele, I Negueruela, M. J. Coe +1
Chevalier & Ilovaisky (1998) use Hipparcos data to show that the X-ray binary systems LSI+61 303 and A0535+262 are a factor of ten closer (i.e. d = few hundred pc) than previously…