From: dgreen@cfa0 (Daniel W. E. Green) Subject: IAUC 6558: SN 1997Z; V1333 Aql; 46P content-length: 2845 Circular No. 6558 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/cfa/ps/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) V1333 AQUILAE A. M. Levine, Massachusetts Institute of Technology (MIT), and B. Thomas, Goddard Space Flight Center (GSFC), on behalf on the RXTE ASM team at GSFC and MIT; M. Garcia and P. Berlind, Smithsonian Astrophysical Observatory; and P. Callanan, University College Cork, report that the low-mass x-ray binary Aquila X-1 (= V1333 Aql) appears to be in a moderate-intensity outburst in quick- look results from the RXTE All Sky Monitor. Recent daily-average flux levels in the band 2-12 keV are as follows: Jan. 27, about 60 mCrab; 28, 120; 29, 190; 30, 260; Feb. 1, 310; 2-5, about 360. Observations of the optical counterpart V1333 Aql from the Whipple Observatory 1.2-m telescope on Feb. 6.543 UT yield V = 16.9. Observations at other wavelengths are encouraged. (C) Copyright 1997 CBAT 1997 February 12 (6558) Daniel W. E. Green