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For refcode 1993AJ....105.2236S:
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1993AJ....105.2236S PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF SN 1990E IN NGC 1035: OBSERVATIONAL CONSTRAINTS FOR MODELS OF TYPE II SUPERNOVAE BRIAN P SCHMIDT, ROBERT P. KIRSHNER, RUDY SCHILD, BRUNO LEIBUNDGUT, DAVID JEFFERY, S. P. WILLNER, REYNIER PELETIER, AND ANN I. ZABLUDOFF Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MassachusettS 02138 Electronic mail: brian@cfanewton.harvard.edu, kirshner@cfanewton.harvard.edu, bruno@popsicle.berkely.edu jeffery@cfanewton.harvard.edu, willner@cfa.harvard.edu, zabludof@cfa MARK M. PHILLIPS, NICHOLAS B. SUNTZEFF, MARIO HAMUY, LISA A. WELLS, R. CHRIS SMITH, JACK A. BALDWIN, W.G. WELLER, M. NAVARETTE, AND L. GONZALEZ Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile Electronic mail: mphillips@ctio.noao.edu, nsuntzeff@ctio.noao.edu, mhamuy@ctio.noao.edu, iwells@noao.edu, csmith@ctio.noao.edu, jbaldwin@ctio.noao.edu ALEXEI V. FILIPPENKO, JOSEPH C. SHIELDS, AND CHARLES C. STEIDEL Department of Astronomy and Center for Particle Astrophysics, University of California, Berkeley, California 94720 Electronic mail: alex@bkyast.berkeley.edu SAUL PERLMUTTER, CARLTON PENNYPACKER, AND CRAIG K. SMITH Lawrence-Berkeley Laboratory, University of California, Berkeley, Berkeley, California 94720 Electronic mail: pennypacker@lbl.gov, saul@lbl.gov, csmith@csa2.lbl.gov ALAIN C. PORTER AND TODD A. BOROSON Kitt Peak National Observatory, P.O. Box 26732, Tucson, Arizona 86726 Electronic mail: aporter@noao.edu, tborason@noao.edu RAYLEE STATHAKIS AND RUSSELL CANNON Anglo-Australian Observatory, Epping Laboratory, P.O. Box 296, Epping, N.S.W. 2121 Australia Electronic mail: rl@aaoepp.oz.au J. PETERS AND E. HORINE F. L. Whipple Observatory, Box 97, Amado, Arizona 85721 KENNETH C. FREEMAN Mt. Stromlo and Siding Spring Observatory, Private Bag, Woden PO, 2606 Canberra, ACT, Australia Electronic mail: kcf@merlin.anu.oz.au DONNA S. WOMBLE Center for astrophysics and Space Sciences, University of California, San Diego, 9500 Gillman Dr., La Jolla, California 92093-0111 Electronic mail: dwomble@ucsd.edu REMINGTON P. S. STONE Lick Observatory, University of California, Santa Cruz, California 95064 Electronic mail: rem@ucscloc.ucsc.edu LAURENCE A. MARSCHALL Department of Physics, Gettysburg College, Gettysburg, Pennsylvania 17325 Electronic mail: marschall@gettysburg.edu ANDREW C. PHILLIPS Department of Astronomy FM.20, University of Washington, Seattle, Washinaton 98195 A. SAHA AND HOWARD E. BOND Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, Maryland 21218 Electronic mail: saha@scivax.stsci.edu, bond@scivax.stsci.edu Received 1992 December 14; revised 1993 January 29 ABSTRACT We present 126 photometric and 30 spectral observations of SN 1990E spanning from 12 days before B maximum to 600 days past discovery. These observations show that SN 1990E was of type II-P, displaying hydrogen in its spectrum, and the characteristic plateau in its light curve. SN 1990E is one of the few SNe II which has been well observed before maximum light, and we present evidence that this SN was discovered very soon after its explosion. In the earliest spectra we identify, for the first time, several H II lines. We present a new technique for measuring extinction to SNe II based on the evolution of absorption lines, and use this method to estimate the extinction to SN 1990E, A_V_= 1.5+/-0.3 mag. From our photometric data we have constructed a bolometric light curve for SN 1990E and show that, even at the earliest times, the bolometric luminosity was falling rapidly. We use the late-time bolometric light curve to show that SN 1990E trapped a majority of the gamma rays produced by the radioactive decay of ^56^Co, and estimate that SN 1990E ejected 0.073_-0.051_^+0.018^ M_sun_ of ^56^Ni, an amount virtually identical to that of SN 1987A.
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