INTEGRAL Latest News
INTEGRAL TOO observations of the BEXRB TRANSIENT V 0332+53 RETURNING TO quiescence
5 October 2015 The Be X-ray binary transient V 0332+53, in outburst since mid-June, has recently entered the sub-critical regime. INTEGRAL TOO observations of this source in revolution 1596 (2015-10-07 14:30:05 to 2015-10-09 17:28:22) will attemp to measure the system cyclotron line energy in the lowest observable state.
INTEGRAL TOO OBSERVATIONS OF THE ACCRETING MS PULSAR IGR J00291+5934
27 July 2015 The accreting ms pulsar IGR J00291+5934 has been found to be active in the optical, by Swift and by MAXI. Concurrent ToO observations have been requested and approved for INTEGRAL revolution 1569 (2015-07-27 17:44:06 to 2015-07-29 20:56:46) and within XMM-Newton revolution 2863 (2015-07-28 11:48:19 to 2015-07-29 11:51:02).
INTEGRAL TOO observations of the BHC GS 1354-645
23 July 2015 The BHC GS 1354-645 has been in outburst since the end of June 2015 and seems to have reached its peak intensity at hard X-rays. An INTEGRAL ToO observation has been approved at the end of revolution 1572 as part of a multi-wavelength campaign, including ALMA, ATCA and possibly other observatories.
INTEGRAL TOO observations of a bright BeXRB transient: V 0332+53
9 July 2015 The Be X-ray binary transient V 0332+53 entered into outburst again in mid June after several years of quiescence and has by now reached almost 600 mCrab in the hard X-ray band. An INTEGRAL ToO observation has been accepted in the first part of revolution 1565 in order to study the source near the peak of the outburst. The source evolution can be followed, e.g., via the link from the BeXRB Monitor page.
INTEGRAL AO-13 General Programme approved
9 July 2015 The INTEGRAL AO-13 General Programme, as recommended by the Time Allocation Committee (TAC) and approved by ESA's Director of Science and Robotic Exploration (Prof. Alvaro Giménez), has been released and the observers have been informed.
Astronomers use cosmic gravity to create a 'black-hole-scope'
6 July 2015 INTEGRAL, Fermi and Swift have used the magnifying power of a cosmic lens to explore the inner regions of a supermassive black hole in PKS 1820-311. The findings by A. Neronov et al. have been published online in Nature Physics today.
INTEGRAL TOO observations of another black-hole binary transient: GS 1354-645
2 July 2015 The black-hole X-ray binary transient GS 1354-645 entered an outburst early June. An INTEGRAL ToO observation was triggered to do simultaneous observations with Swift, SALT and ATCA, in the 2nd part of Revolution 1560, on 5 July 2015. The data will become immediately public.
Continued public INTEGRAL Target of Opportunity observations of V404 Cyg (GS2023+338)
23 June 2015 The extreme brightness of the transient in (hard) X-rays (GCNs 17929, 17932, 17935, 17938, 17943, 17944, 17945, 17946, 17948, 17949; ATels #7646, #7647, #7662, #7665, #7693, #7694) makes this a unique event, and INTEGRAL is the only observatory currently capable of doing high-resolution gamma-ray spectroscopy. Therefore, INTEGRAL will continue to observe V404 Cyg as long as the source remains bright. INTEGRAL already performed a public observation from June 17-20 (Revolution 1554; see ATels #7662, #7693; see also the News item below), and is now performing a pre-approved ToO programme from June 20-25 (Revolutions 1555-1556; PI: Rodriguez). The PI has kindly agreed to make the consolidated data publicly available, about a month after the observations have been performed. INTEGRAL observations after June 25 will be made immediately publicly available again, to maximise the scientific returns. The exact observing strategy will depend on the evolution of the transient. Observations of V404 Cyg without interruptions are now planned until revolution 1563 ending on July 13.
INTEGRAL TOO observations of the black-hole binary X-ray transient V404 Cyg (GS 2023+338)
17 June 2015 Renewed hard X-ray flaring activity from V404 Cyg (GS 2023+338) triggered the Swift/BAT (GCN 17929), Fermi/GBM (GCNs 17932, 17935) and Konus-Wind (GCN 17938), which indicate the start of a new outburst from this source (ATels #7646, #7647). These observations have initiated a public ToO observation starting tonight, in Revolution 1554, from 17-19 June 2015.