An Exploratory Chandra survey of Large Bright Quasar Survey broad absorption line QSOs

Details An Exploratory Chandra survey of Large Bright Quasar Survey broad absorption line QSOs An Exploratory Chandra survey of Large Bright Quasar Survey broad absorption line QSOs

2002-05-17

arxiv.org/abs/astro-ph/0205303v1

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. To appear in the proceedings of the workshop "X-ray spectroscopy of AGN with Chandra and XMM-Newton", eds.

Scientific paper

We are in the process of obtaining a complete sample of exploratory X-ray observations of broad absorption line (BAL) QSOs from the Large Bright Quasar Survey (LBQS). This survey is composed of short (5-7 ks) Chandra ACIS-S3 observations designed to significantly constrain X-ray fluxes and hardness ratios. Our sample avoids the selection biases of some previous surveys while providing X-ray data of similar quality. Of 17 BAL QSOs observed to date, 13 are detected. In general, our results are consistent with absorption as the primary cause of X-ray weakness in BAL QSOs. As found by Green et al. (2001), those BAL QSOs with low-ionization absorption lines are found to be notably X-ray weaker than BAL QSOs with only high ionization lines.

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