SIMBAD references

2009ApJ...693.1621S - Astrophys. J., 693, 1621-1627 (2009/March-2)

Long-term X-ray monitoring of the TeV binary LS I +61 303 with the Rossi X-ray timing explorer.

SMITH A., KAARET P., HOLDER J., FALCONE A., MAIER G., PANDEL D. and STROH M.

Abstract (from CDS):

We report on the results of a long-term X-ray monitoring campaign of the galactic binary LS I +61 303 performed by the Rossi X-ray Timing Explorer. This data set consists of 1 ks pointings taken every other day between 2007 August 28 and 2008 February 2. The observations covered six full cycles of the 26.496 day binary period and constitute the largest continuous X-ray monitoring data set on LS I +61 303 to date with this sensitivity. There is no statistically strong detection of modulation of the flux or the photon index with orbital phase; however, we do find a strong correlation between the flux and photon index, with the spectrum becoming harder at higher fluxes. The data set contains three large flaring episodes, the largest of these reaching a flux level of 7.2+0.1–0.2x10–11 erg/cm2/s in the 3-10 keV band, which is a factor 3 times larger than the flux levels typically seen in the system. Analysis of these flares shows the X-ray emission from LS I +61 303 changing by up to a factor of 6 over timescales of several hundred seconds as well as doubling times as fast as 2 s. This is the fastest variability ever observed from LS I +61 303 at this wavelength and places constraints on the size of the X-ray emitting region.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individual: LS I +61 303

Simbad objects: 8

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2021.03.07-20:32:58

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