Chandra follow up of XTE J1719-291

Details Chandra follow up of XTE J1719-291 Chandra follow up of XTE J1719-291

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2514s&link_type=abstract

Chandra proposal ID #09408295

Physics

Scientific paper

XTE J1719-291 is a new, faint X-ray transient, discovered with RXTE/PCA on March 21 (ATel#1442). PCA monitoring indicated an initial rise followed by a delcine. Swift/XRT follow up on 30 March and April 3 provided the position with an uncertainty of 3.8 arcsec and confirmed the decline (ATel#1451,#1467). The XRT spectrum was fit with an absorbed powerlaw with nH=6e21cm-2 and a photon index of 3. A more recent Swift observation on April 9 showed a re-brightening by a factor 10 and a hardening of the spectrum (ATel#1467), with a photon index of 2.5 and a 2-10 keV absorbed flux of 1.4e-11 erg/cm2/s. There are no known objects in Simbad or ROSAT catalogues within the XRT error circle. To identify the IR counterpart, we observed XTE J1719 on April 11 in 7 bands (grizJHK) with GROND at the MPI/ESO 2.2m telescope at La Silla. We find 13 near-infrared sources in the XRT error circle. The transient properties are unusual, so it's unclear what kind of NIR variability is to be expected.

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