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J. X. Wang (JHU), S. Malhotra, J.E. Rhoads (STScI), M.J.I. Brown, A. Dey, B.T. Jannuzi (NOAO), S. Dawson, H. Spinrad (UC Berkeley), T.M. Heckman, C.A. Norman (JHU), D. Stern (Caltech), G.P. Tiede (BGSU), P. Tozzi (INAF)
A 172 ks long Chandra exposure was carried out in the LALA-Bootes field and a similar one for the LALA cetus field. These exposure were deep enough to detect LALA sources, if they were type-II quasars. Lyman-alpha emitters found with LALA show high equivalent widths and AGN phenomenon is one explanation. A total of 101 Ly-alpha emitters are covered by the two Chandra images. No Ly-alpha emitters are detected individually or in the co-added X-ray images. Our analysis indicates that fewer than 4.8 Ly-alpha emitters could be possible AGNs based on the upper limit of their average X-ray to Ly-alpha ratio. The two X-ray images are among the deepest taken by Chandra, with a total of 348 X-ray sources detected, similar to the number of X-ray sources in Chandra Deep Field South. We also see field-to-field variations of the hard X-ray source counts in different Chandra fields, due to large scale structure.
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Bulletin of the American Astronomical Society, 36 #2
© YEAR. The American Astronomical Soceity.