The stars in the massive colliding wind LBV binary eta Car are approaching periastron passage which is associated with strong X-ray brightening and X-ray variability. NICER detected an X-ray brightening event from Eta Car starting on Nov 15 2019 (ATEL 13327) and now AGILE reports a brightening at energies > 100 MeV (ATEL 13329). A connection between the X-ray and gamma-ray variations of the source has not been seen before and needs to be studied with INTEGRAL.
Publications
Diffuse Galactic emission spectrum between 0.5 and 8.0 MeV - Siegert, Thomas, Berteaud, Joanna,Calore, Francesca,Serpico, Pasquale D.,Weinberger, Christoph (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022A&A...660A.130S
GG Carinae: discovery of orbital-phase-dependent 1.583-day periodicities in the Be supergiant binary - Porter, Augustus, Blundell, Katherine,Podsiadlowski, Philipp,Lee, Steven (2021-06-01) http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.4802P
Study of changes in the pulsation period of 148 Galactic Cepheid variables - Csornyei, G., Szabados, L.,Molnar, L.,Cseh, B.,Egei, N.,Kalup, Cs,Kecskemethy, V.,Konyves-Toth, R.,Sarneczky, K.,Szakats, R. (2022-04-01) http://ui.adsabs.harvard.edu/#abs/2022MNRAS.511.2125C
26Al gamma rays from the Galaxy with INTEGRAL/SPI - Pleintinger, Moritz M. M., Diehl, Roland,Siegert, Thomas,Greiner, Jochen,Krause, Martin G. H. (2023-04-01) http://ui.adsabs.harvard.edu/#abs/2023A&A...672A..53P
Temporal Coverage
2019-12-06T13:11:28Z / 2019-12-27T08:59:27Z
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.