the astrophysical nature of the hard x-ray source grs 1915+105 is unknown. recent observations in the radio and near infrared wavelengths have led to the identification of a counterpart at those energies. it is likely that grs 1915+105 may also be identical with the soft gamma-ray repeater sgr 1900+14 showing recent activities. in addition, co measurements indicate the presence of two molecular clouds, one of which being a good candidate for a possible association with the grs 1915+105. the source shows strong variability (partially correlated) in radio, near ir and hard x-rays including strong outbursts. this observational evidence could be explained by a scenario in which a possible black hole is fed by accretion from giant molecular clouds and the observed variability and bursts might be due to thermal instabilities during accretion. in case grs1915+105 will undergo a new outburst at other wavelengths (including new soft gamma-ray repeating events (as reported e.g. from the batse experiment onboard gro)) immediate follow-up observations in the ir shall be conducted in form of a too observation. the investigations of the ir quiescent counterpart are subject of a second independent proposal.
Instrument
LWS01 , SWS01
Temporal Coverage
1996-03-09T15:36:32Z/1997-03-09T21:22:13Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, WINKLER et al., 1999, 'TOO:THE INFRARED COUNTERPART OF GRS 1915+105 OBSERVATIONS OF OUTBURSTS', 1.0, European Space Agency, https://doi.org/10.5270/esa-2d6q9qd
