Circular No. 8411 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) SUPERNOVAE 2004du, 2004ek, 2004em, AND 2004en A. V. Filippenko, M. Ganeshalingam, and B. J. Swift, University of California, Berkeley, write: "Inspection of CCD spectra (range 330-1000 nm), obtained on Sept. 24 UT with the Shane 3-m reflector at Lick Observatory, reveals that SN 2004em (IAUC 8406) is of type II, shortly after the explosion. The object has a blue, nearly featureless continuum and clear hydrogen Balmer lines with P-Cyg profiles, but the emission component of H_alpha is considerably stronger than the absorption component. Weak He I 587.6-nm absorption is visible, as well. SN 2004en (IAUC 8406) is also of type II, but somewhat older, perhaps a few weeks after the explosion. SN 2004du (IAUC 8387) appears to be a normal type-II-P supernova with typical P-Cyg profiles; the narrow H_alpha emission line responsible for the previous classification of type IIn (IAUC 8388) was based partly on a superposed H II region. We confirm the suggestion that SN 2004ek (IAUC 8405) is a young type-II supernova with a blue continuum (IAUC 8409), but now the flux density shortward of 400 nm drops substantially. There are weak hydrogen Balmer and Fe II absorption lines, although the weak H_alpha line is almost entirely in emission." SUPERNOVA 2004eq IN ESO 404-G12 Y. Chen provides a corrected position for SN 2004eq (cf. IAUC 8407): R.A. = 21h57m09s.46, Decl. = -34o34'51".3 (equinox 2000.0), which is 23".1 east and 4".3 north of the center of ESO 404-G12 = PGC 67701. He adds that a bright nearby foreground star has position end figures 09s.10, 48".1. 4U 0115+63 J. Tueller, Goddard Space Flight Center (GSFC), on behalf of the InFOCuS team (a collaboration between NASA/GSFC, Nagoya University, JAXA/ISAS, and the University of Pennsylvania), reports that observations of the transient x-ray pulsar 4U 0115+63 (cf. IAUC 3161, 7116) were made with a balloon-borne hard-x-ray focusing telescope (launched from Ft. Sumner, NM) for 3200 s starting at Sept. 17.19 UT. The pulsar is continuing an outburst first detected by RXTE/ASM during Aug. 27-Sept. 2 (cf. http://xte.mit.edu/XTE.html). A preliminary 20-50-keV flux of 3.18 (+0.375/-0.324) x 10**-9 erg cm**-2 s**-1, consistent with the RXTE/ASM data, was derived from data obtained during Sept. 17.20- 17.22. A summed-epoch analysis yields a preliminary pulse period of 3.616 +/- 0.001 s. (C) Copyright 2004 CBAT 2004 September 25 (8411) Daniel W. E. Green