Internet Archive Scholar

Optical and Near-Infrared Observations of the Peculiar Type ia Supernova 1999ac

Mark M. Phillips, Kevin Krisciunas, Nicholas B. Suntzeff, R. G. Abraham, M. G. Beckett, Marco Bonati, Pablo Candia, T. Michael Corwin, Darren L. Depoy, Juan Espinoza, Andrew E. Firth, Wendy L. Freedman (+20 others)
2006 Astronomical Journal  

Preserved Fulltext

fulltext thumbnail
Web Archive Capture PDF (498.7 kB)
https://web.archive.org/web/20181030063101/http://cds.cern.ch/record/925766/files/0601684.pdf

A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL. The file type is application/pdf.

Other Versions

2006 pre-print
arXiv:astro-ph/0601684v1 fatcat:ay7ddgf7dbbj7am424ufp5lf2m
We present 39 nights of optical photometry, 34 nights of infrared photometry, and 4 nights of optical spectroscopy of the Type Ia SN 1999ac. This supernova was discovered two weeks before maximum light, and observations were begun shortly thereafter. At early times its spectra resembled the unusual SN 1999aa and were characterized by very high velocities in the Ca II H and K lines, but very low velocities in the Si II 6355 A line. The optical photometry showed a slow rise to peak brightness
more » ... quite peculiarly, was followed by a more rapid decline from maximum. Thus, the B- and V-band light curves cannot be characterized by a single stretch factor. We argue that the best measure of the nature of this object is not the decline rate parameter Delta m_15 (B). The B-V colors were unusual from 30 to 90 days after maximum light in that they evolved to bluer values at a much slower rate than normal Type Ia supernovae. The spectra and bolometric light curve indicate that this event was similar to the spectroscopically peculiar slow decliner SN 1999aa.
doi:10.1086/503108 fatcat:ykhfxk2b7bhspnyzdjbqgu6jwy
Multiple Versions
Citation

Mark M. Phillips, Kevin Krisciunas, Nicholas B. Suntzeff, R. G. Abraham, M. G. Beckett, Marco Bonati, Pablo Candia, T. Michael Corwin, Darren L. Depoy, Juan Espinoza, Andrew E. Firth, Wendy L. Freedman, Gaspar Galaz, Lisa Germany, David Gonzalez, Mario Hamuy, N. C. Hastings, Aimee L. Hungerford, Valentin D. Ivanov, Erika Labbé, Ronald O. Marzke, Patrick J. McCarthy, Richard G. McMahon, Russet McMillan, Cesar Muena, S. E. Persson, Miguel Roth, María Teresa Ruiz, R. Chris Smith, Roger Smith, Louis-Gregory Strolger, Christopher Stubbs. "Optical and Near-Infrared Observations of the Peculiar Type ia Supernova 1999ac." Astronomical Journal 131.5 (2006) 2615-2627