Electronic Telegram No. 1105 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 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://www.cfa.harvard.edu/iau/cbat.html SUPERNOVAE 2007nm, 2007nn, 2007no, AND 2007np S. G. Djorgovski, A. J. Drake, A. Mahabal, C. Donalek, E. Glikman, M. J. Graham, and R. Williams, California Institute of Technology; C. Baltay, D. Rabinowitz, A. Bauer, R. Scalzo, N. Elman, and J. Jerke, Yale University; R. Thomas and P. Nugent, Lawrence Berkeley National Laboratory; J. Hennawi, University of California at Berkeley; A. Myers, University of Illinois at Urbana-Champaign; A. Allan, University of Exeter; I. Steele, Liverpool John Moores University; T. Brown, Las Cumbres Observatory Global Telescope Network; and the Palomar-Quest (PQ) Survey Team report the discovery of four apparent type-Ia supernovae from the real-time analysis of transients discovered in the PQ sky survey (in SDSS g, r, i, and z bands, in which each object was observed in at least two out of the four bands) on the nights of Oct. 8-10 UT, with spectroscopic follow-up at the Palomar 5-m telescope on the nights of Oct. 10 and 11. SN 2007 UT R.A. (2000.0) Decl. Mag. z Type 2007nm Oct. 8 22 45 27.42 +10 39 32.7 19.6 0.046 Ia 2007nn Oct. 8 23 06 27.43 +09 53 42.6 19.5 0.07 Ia 2007no Oct. 9 2 41 05.70 -03 38 14.1 20.5 0.135 Ia 2007np Oct. 10 1 58 49.66 -02 26 27.5 20.2 - Ia? The approximate SDSS (i.e., Gunn) r-band discovery magnitudes tabulated above are uncertain by about 0.3 mag, pending a real calibration. SN 2007nm was near maximum, with its spectrum similar to that of 2000cx; 2007nn was about one month past maximum; 2007no was about 9 days before maximum, its spectrum similar to that of 1999aa; 2007np was found to be possibly a type-Ia supernova before maximum. Additional information on these objects (and two additional transients that appear to be active galactic nuclei) appears at http://www.astronomerstelegram.org/?read=1234 (and /?read=1240, /?read=1244). The transients were also posted to http://voeventnet.caltech.edu. Finding charts and additional details can be found at http://palquest.org/transients/. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 October 20 (CBET 1105) Daniel W. E. Green