First Detection of the X-ray Burster 2S 1711-339 in Quiescence and a Suggested Optical Counterpart.
We report on a Chandra observation of the transient low-mass X-ray binary and type-I X-ray burst source 2S 1711-339 (Carpenter et al. 1977,MNRAS,179,270; Wilson...
Further Chandra observations of SAX J1747.0-2853 and the region around Sgr A*
On 20-21 October 2005, the remaining six Chandra/HRC-I observations (as mentioned in ATEL #637) were performed as part of the XMM-Newton/ Chandra monitoring...
Improved position of the new X-ray transient XTE J1637-498
Following the discovery of the new X-ray transient XTE J1637-498 (Atel #1699), we obtained a short (nearly 1 ksec) observation using the Swift/XRT in PC mode on...
Indirect evidence for an active radio pulsar in SAX J1808.4-3658 during quiescence
Millisecond radio pulsars are neutron stars that have been spun-up by the transfer of angular momentum during the low-mass X-ray binary phase. The transition...
La erupción de una estrella de neutrones revela la naturaleza de fenómenos solo observados en agujeros negros
Un equipo científico internacional, liderado por el Instituto de Astrofísica de Canarias (IAC), ha encontrado una estrella de neutrones que roba materia a una...
Li abundances in late-type companions to neutron stars and black hole candidates
Following our recent report of a strong Li lambda 6708 resonance line in the secondary of the black hole candidate V404 Cyg, we present here its detection in...
Long-term Study of the 2020 Magnetar-like Outburst of the Young Pulsar PSR J1846-0258 in Kes 75
Magnetar-like activity has been observed in a large variety of neutron stars. PSR J1846‑0258 is a young 327 ms radio-quiet pulsar with a large rotational power...
M31GC J004234+405709 (Bol 117) Observed by Chandra Is a New Transient X-Ray Source in M31: CXOM31 J004234.2+405709
In ATel #1815 we erroneously associated the globular cluster M31GC J004234+405709 (Bol 117) with object s1-1 from Williams et al. (2006, ApJ 643, 356). Bol 117...