THE SPIN OF THE BLACK HOLE IN THE SOFT X-RAY TRANSIENT A0620–00 [PDF]
, 2010 During its year-long outburst in 1975–76, the transient source A0620–00 reached an intensity of 50 Crab, an all-time record for any X-ray binary. The source has been quiescent since then. We have recently determined accurate values for the black hole (BH)
L. Gou +6 more
semanticscholar +1 more source
X-ray eruptions every 22 days from the nucleus of a nearby galaxy [PDF]
Nature Astronomy, 2023 Galactic nuclei showing recurrent phases of activity and quiescence have recently been discovered. Some have recurrence times as short as a few hours to a day and are known as quasi-periodic X-ray eruption (QPE) sources.
M. Guolo +17 more
semanticscholar +1 more source
X-ray Transient Sources (Multifrequency Laboratories) The Case of the Prototype A0535+26/HDE 245770
, 2011 The goal of this paper is to discuss the behaviour of the X-ray transient source A0535+26 which is considered for historical reasons and for the huge amount of multifrequency data, spread over a period of 35 years, as the prototype of this class of ...
F. Giovannelli, L. Sabau-Graziati
semanticscholar +1 more source
Optical and near-infrared observations of the GRB 970616 error box [PDF]
, 1999 We report on near-infrared and optical observations of the GRB 970616 error box and of the X-ray sources discovered by ASCA and ROSAT in the region. No optical transient was found either within the IPN band or in the X-ray error boxes, similarly to other
Castro-Tirado, A. J. +9 more
core +2 more sources
The Discovery Outburst of the X-Ray Transient IGR J17497–2821 Observed with RXTE and ATCA [PDF]
, 2006 We report the results of a series of RXTE and ATCA observations of the recently discovered X-ray transient IGR J17497-2821. Our 3-200 keV PCA+HEXTE spectral analysis shows very little variations over a period of ~10 days around the maximum of the ...
Jérôme Rodriguez +7 more
semanticscholar +1 more source
A Catalog of Transient X-ray Sources in M31
, 2006 From October 1999 to August 2002, 45 transient X-ray sources were detected in M31 by Chandra and XMM-Newton. We have performed spectral analysis of all XMM-Newton and Chandra ACIS detections of these sources, as well as flux measurements of Chandra HRC ...
Benjamin F. Williams +18 more
core +2 more sources
Fermi-LAT results on Galactic Plane gamma-ray Transient Sources [PDF]
, 2009 The Large Area Telescope on the Fermi gamma-ray Space Telescope provides unprecedented sensitivity for all-sky monitoring of gamma-ray activity. It has detected a few Galactic sources, including 2 gamma-ray binaries and a microquasar.
Chaty, Sylvain
core +3 more sources
THE OPTICAL COUNTERPART TO THE X-RAY TRANSIENT IGR J1824−24525 IN THE GLOBULAR CLUSTER M28 [PDF]
, 2013 We report on the identification of the optical counterpart to the recently detected INTEGRAL transient IGR J1824−24525 in the Galactic globular cluster M28.
C. Pallanca +4 more
semanticscholar +1 more source
The Chandra ACIS Survey of M33 (ChASeM33): Transient X-ray Sources Discovered in M33
, 2008 The Chandra ACIS Survey of M33 (ChASeM33) has acquired 7 fields of ACIS data covering M33 with 200 ks of exposure in each field. A catalog from the first 10 months of data, along with archival Chandra observations dating back to the year 2000, is ...
Avi Shporer +14 more
core +1 more source
First Results from Fermi GBM Earth Occultation Monitoring: Observations of Soft Gamma-Ray Sources Above 100 keV [PDF]
, 2010 The NaI and BGO detectors on the Gamma-ray Burst Monitor (GBM) on Fermi are now being used for long-term monitoring of the hard X-ray/low energy gamma-ray sky.
A. Camero-Arranz +64 more
core +3 more sources