Intermediate long X-ray bursts from the ultra-compact binary candidate SLX 1737-282
نویسندگان
چکیده
منابع مشابه
Discovery of the neutron star nature of SLX 1737 − 282
SLX 1737−282 is a persistent moderately bright X-ray source 1. 2 from the Galactic center. X-ray observations with the Wide Field Cameras on BeppoSAX have for the first time revealed the true nature of SLX 1737−282: a 15-min long thermonuclear flash was detected exposing the source as a neutron star in a binary system. The flash was Eddington-limited constraining the distance to between 5 and 8...
متن کاملHST spectrum and timing of the ultra-compact X-ray binary candidate 47 Tuc X9
To confirm the nature of the donor star in the ultra-compact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3,000–10,000Å) with the Hubble Space Telescope / Space Telescope Imaging Spectrograph. We find no strong emission or absorption features in the spectrum of X9. In particular, we place 3σ upper limits on the H α and He ii λ4686 emission line equivalent widths −EWHα . 14 Å a...
متن کاملOptical spectroscopy of (candidate) ultra-compact X-ray binaries
We present (preliminary) results of our systematic spectroscopic study of (candidate) ultra-compact X-ray binaries. Most candidates are confirmed and we found the first optical spectra of (pure) carbon-oxygen accretion discs.
متن کاملTwo new candidate ultra-compact X-ray binaries
We present the identification of the optical counterparts to the low-mass X-ray binaries 1A 1246−588 and 4U 1812−12. We determine the X-ray position of 1A 1246−588 from ROSAT /PSPC observations and find within the error circle a blue star with V = 19.45, B − V = 0.22 and R − I = 0.22 which we identify as the counterpart. Within the Chandra error circle of 4U 1812−12, a single star is present wh...
متن کاملUltra-compact (X-ray) binaries
A short review of ultra-compact binaries, focused on ultra-compact X-ray binaries, is followed by a discussion of recent results of our VLT campaign to obtain optical spectra of (candidate) ultra-compact X-ray binaries. We find evidence for carbon/oxygen as well as helium/nitrogen discs and no evidence for (traces) of hydrogen. This suggests that the donors in the observed systems are white dwa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2008
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20078982