CONTEMPORANEOUS XMM-NEWTON INVESTIGATION OF A GIANT X-RAY FLARE AND QUIESCENT STATE FROM A COOL M-CLASS DWARF IN THE LOCAL CAVITY
- Physics Department, University of Miami, Coral Gables, FL 33124 (United States)
- Astronomy Department, University of Washington, P.O. Box 351580, Seattle, WA 98195 (United States)
We report the serendipitous detection of a giant X-ray flare from the source 2XMM J043527.2-144301 during an XMM-Newton observation of the high latitude molecular cloud MBM20. The source has not been previously studied at any wavelength. The X-ray flux increases by a factor of more than 52 from quiescent state to peak of flare. A 2MASS counterpart has been identified (2MASS J04352724-1443017), and near-infrared colors reveal a spectral type of M8-M8.5 and a distance of (67 {+-} 13) pc, placing the source in front of MBM20. Spectral analysis and source luminosity are also consistent with this conclusion. The measured distance makes this object the most distant source (by about a factor of four) at this spectral type detected in X-rays. The X-ray flare was characterized by a peak X-ray luminosity of {approx}8.2 x 10{sup 28} erg s{sup -1} and integrated X-ray energy of {approx}2.3 x 10{sup 32} erg. The flare emission has been characterized with a two-temperature model with temperatures of {approx}10 and 46 MK (0.82 and 4.0 keV) and is dominated by the higher temperature component.
- OSTI ID:
- 21574754
- Journal Information:
- Astrophysical Journal, Vol. 731, Issue 1; Other Information: DOI: 10.1088/0004-637X/731/1/63; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
THE XMM-NEWTON WIDE-FIELD SURVEY IN THE COSMOS FIELD (XMM-COSMOS): DEMOGRAPHY AND MULTIWAVELENGTH PROPERTIES OF OBSCURED AND UNOBSCURED LUMINOUS ACTIVE GALACTIC NUCLEI
THE FIFTH DATA RELEASE SLOAN DIGITAL SKY SURVEY/XMM-NEWTON QUASAR SURVEY