A dataset provided by the European Space Agency

Name 020473


DOI https://doi.org/10.5270/esa-llijj2v
Description The ADAF model for stellar-mass Galactic black holes makes a specific prediction: at fractional Eddington mass accretion rates below 0.08, the inner edge of the accretion disk should be truncated at appx. 1 E+4 Schwarzschild radii. Disks truncated at such radii should not be visible in X-rays, as viscous heating is small when the disk is not very deep in the gravitational potential. We request 270 ksec of goodtime to observe GX 339-4 in quiescence with XMM-Newton, to rigorously test the truncated disk prediction at an m-dot-Edd. of 3 E-5 by searching for a disk component in the X-ray spectrum. We will support this observation with IR (Magellan) and radio (ATCA) monitoring observation.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-03-16T15:40:25Z/2004-03-20T05:46:55Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2005-12-23T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-12-23T00:00:00Z, 020473, 17.56_20190403_1200. https://doi.org/10.5270/esa-llijj2v