
| Proposal ID | 020473 |
| Title | XMM-NEWTON OBSERVATIONS OF GX 339-4 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204730201 |
| DOI | https://doi.org/10.5270/esa-llijj2v |
| Principal Investigator, PI | Dr JON MILLER |
| Abstract | The ADAF model for stellar-mass Galactic black holes makes a specificprediction: at fractional Eddington mass accretion rates below 0.08, the inneredge of the accretion disk should be truncated at appx. 1 E+4 Schwarzschildradii. Disks truncated at such radii should not be visible in X-rays, as viscousheating 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 withXMM-Newton, to rigorously test the truncated disk prediction at an m-dot-Edd. of3 E-5 by searching for a disk component in the X-ray spectrum. We will supportthis observation with IR (Magellan) and radio (ATCA) monitoring observation. |
| Publications |
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| 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 Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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 |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "XMM-Newton", "adaf model", "truncated disk prediction", "ir magellan", "inner edge", "xmm newton", "specific prediction", "gx 339", "dot edd", "disk component", "radio atca", "accretion disk", "xray spectrum", "dis truncated", "viscous heating", "schwarzschild radii", "gravitational potential" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr JON MILLER, 2005, 'XMM-NEWTON OBSERVATIONS OF GX 339-4', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-llijj2v |