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...
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PublicationImproved position of the new X-ray transient XTE J1637-498
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PublicationIndirect 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...
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PublicationLi 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...
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PublicationM31GC 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...
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TalkMatter under extreme conditions and Heavy Ion Colliders
According to Quantum Chromodynamics, which is the well established theory of strong interactions, quark and gluons are forced to live inside hadrons because of...
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PublicationMini-outburst of Aql X-1
We report YALO consortium observation of a mini-outburst of Aquila X-1 = V1333 Aql, which occurred between July 04.27 and 07.29 UT. This X-ray binary outbursts...
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PublicationMultiwavelength observations of XTE J1859+226
On March 2 06:00 UT the transient source XTE J1859+226 had faded considerably to R=18.0 in the optical (IAC) and to a flux of about 13 mCrab (RXTE ASM). However...
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PublicationNear-IR and Optical Observations of the Ongoing Outburst of SAX J1808.4-3658
Following the report of a new outburst of the accreting millisecond pulsar SAX J1808.4-3658 by Markwardt and Swank (ATel #1728), the source was observed using...
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PublicationNew constraints on neutron star models of gamma ray bursts. I - EXOSAT observations of two gamma ray burst error boxes
Two EXOSAT observations of gamma-ray burst error boxes and their possibly associated optical transients are discussed. No point source was detected in either...