Cen X-4, discovered in 1969 during an outburst, is, at a distance of 1.2 kpc, the closest neutron star low-mass X-ray binary. This X-ray transient has recently been reported - first in optical (ATels 14254, 14320), then in X-rays (Swift and NICER; ATel 14303), to be significantly brightening, which strongly suggests the source is going into its third outburst after more than 41 years in quiescence. We propose a Target of Opportunity monitoring of what may well be a once-in-a-lifetime event.
Primordial black hole dark matter in the context of extra dimensions - Friedlander, Avi, Mack, Katherine J.,Schon, Sarah,Song, Ningqiang,Vincent, Aaron C. (2022-05-01) http://ui.adsabs.harvard.edu/#abs/2022PhRvD.105j3508F
Temporal Coverage
2021-01-13T19:55:58Z / 2021-01-14T21:47:13Z
Version
1.0
Mission Description
The INTEGRAL (International Gamma-Ray Astrophysics Laboratory) mission, launched by the European Space Agency (ESA) on October 17, 2002, was designed to study high-energy phenomena in the universe. INTEGRAL was operating until february 2025 and it was equipped with three high-energy instruments: the Imager on Board the INTEGRAL Satellite (IBIS), the Spectrometer on INTEGRAL (SPI), and the JEM-X (Joint European Monitor for X-rays). Its Optical Monitoring Camera (OMC) provided optical V-band magnitude measurements, complementing the high-energy observations.
