Circular No. 8110 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) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html ISSN 0081-0304 Phone 617-495-7440/7244/7444 (for emergency use only) V838 MONOCEROTIS M. Orio, Istituto Nazionale di Astrofisica, Torino, and University of Wisconsin; S. G. Starrfield, Arizona State University; and E. Tepedenlegliolu, University of Wisconsin, report that V838 Mon was observed with Chandra (+ ACIS-S) on Feb. 23 for 6800 s, and it was not detected with a 3-sigma upper limit to the count rate of approximately 0.04 count/s: "This translates into an upper limit to the unabsorbed flux in the band 0.2-10 keV of F_x