CHANDRA Resolves the Variable Gravitational Lens System RXJ0911.4\+0551; Constraining H0 within a Single X-ray Observation.

Details CHANDRA Resolves the Variable Gravitational Lens System RXJ0911.4\+0551; Constraining H0 within a Single X-ray Observation. CHANDRA Resolves the Variable Gravitational Lens System RXJ0911.4\+0551; Constraining H0 within a Single X-ray Observation.

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.0304c&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #03.04; Bulletin of the American Astronomical Society, Vol. 32, p.1186

Astronomy and Astrophysics

Astronomy

Scientific paper

The mini-BAL quasar RXJ0911.4+0551 was observed with the Chandra ACIS-S for about 30ks as part of a gravitational lens (GL) survey aimed at measuring time-delays. The Chandra image of the RXJ0911.4+0551 field shows the galaxy cluster lens approximately 40" SW of the lensed quasar. The cluster is quite faint with a 0.2-2 keV flux of 4.4 x 10-15 erg s-1 cm-2. We have incorporated the detected location of the galaxy cluster in constraining GL models for this system. An interesting result of our timing analysis is the possible detection of a rapid flux variation in the light curve of image A2. We briefly discuss possible origins for the observed short-term X-ray variability. Our GL model for the RXJ0911.4+0551 GL system predicts a time-delay of less than a day between images A1 and A2. RXJ0911.4+0551 is an ideal system to apply the GL method for estimating the Hubble Constant. We describe the prospects of measuring H0 within a single X-ray observation.

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