Circular No. 5907 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU) GRO J0422+32 P. Zhao, P. Callanan, M. Garcia, and J. McClintock, Smithsoni- an Astrophysical Observatory, report: "The x-ray nova GRO J0422+32, which is currently in outburst (IAUC 5901), continues to brighten optically. CCD photometry obtained with the F. L. Whipple Observa- tory's 1.2-m telescope gives the following magnitudes (+/- 0.02): Dec. 10.35 UT, R = 14.89; 10.47, 14.81; 13.12, R = 14.92, V = 15.21; 14.09, 14.90, 15.16; 14.37, 14.87, 15.13. The nova has brightened by > 0.5 mag during the past 6 days; it is now brighter than the reported maximum of the outburst that occurred this past August (IAUC 5842, 5844)." 1993 December 15 (5907) Daniel W. E. Green