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dc.contributor.authorBrown, Peter J.
dc.contributor.authorRoming, Peter W. A.
dc.contributor.authorMilne, Peter
dc.contributor.authorBufano, Filomena
dc.contributor.authorCiardullo, Robin
dc.contributor.authorElias-Rosa, Nancy
dc.contributor.authorFilippenko, Alexei V.
dc.contributor.authorFoley, Ryan J.
dc.contributor.authorGehrels, Neil
dc.contributor.authorGronwall, Caryl
dc.contributor.authorHicken, Malcolm
dc.contributor.authorHolland, Stephen T.
dc.contributor.authorHoversten, Erik A.
dc.contributor.authorImmler, Stefan
dc.contributor.authorKirshner, Robert P.
dc.contributor.authorLi, Weidong
dc.contributor.authorMazzali, Paolo
dc.contributor.authorPhillips, Mark M.
dc.contributor.authorPritchard, Tyler
dc.contributor.authorStill, Martin
dc.contributor.authorTuratto, Massimo
dc.contributor.authorBerk, Daniel Vanden
dc.date.accessioned2019-09-25T14:12:05Z
dc.date.issued2010
dc.identifier.citationBrown, Peter J., Peter W. A. Roming, Peter Milne, Filomena Bufano, Robin Ciardullo, Nancy Elias-Rosa, Alexei V. Filippenko, et al. 2010. “THE ABSOLUTE MAGNITUDES OF TYPE Ia SUPERNOVAE IN THE ULTRAVIOLET.” The Astrophysical Journal 721 (2): 1608–26. https://doi.org/10.1088/0004-637x/721/2/1608.
dc.identifier.issn0004-637X
dc.identifier.issn1538-4357
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41399763*
dc.description.abstractWe examine the absolute magnitudes and light-curve shapes of 14 nearby (redshift z = 0.004-0.027) Type Ia supernovae (SNe Ia) observed in the ultraviolet (UV) with the Swift Ultraviolet/Optical Telescope. Colors and absolute magnitudes are calculated using both a standard Milky Way extinction law and one for the Large Magellanic Cloud that has been modified by circumstellar scattering. We find very different behavior in the near-UV filters (uvw1(rc) covering similar to 2600-3300 (A) over circle after removing optical light, and u approximate to 3000-4000 (A) over circle) compared to a mid-UV filter (uvm2 approximate to 2000-2400 (A) over circle). The uvw1(rc) - b colors show a scatter of similar to 0.3 mag while uvm2-b scatters by nearly 0.9 mag. Similarly, while the scatter in colors between neighboring filters is small in the optical and somewhat larger in the near-UV, the large scatter in the uvm2 - uvw1 colors implies significantly larger spectral variability below 2600 (A) over circle. We find that in the near-UV the absolute magnitudes at peak brightness of normal SNe Ia in our sample are correlated with the optical decay rate with a scatter of 0.4 mag, comparable to that found for the optical in our sample. However, in the mid-UV the scatter is larger, similar to 1 mag, possibly indicating differences in metallicity. We find no strong correlation between either the UV light-curve shapes or the UV colors and the UV absolute magnitudes. With larger samples, the UV luminosity might be useful as an additional constraint to help determine distance, extinction, and metallicity in order to improve the utility of SNe Ia as standardized candles.
dc.language.isoen_US
dc.publisherAmerican Astronomical Society
dash.licenseLAA
dc.titleThe Absolute Magnitudes of Type Ia Supernovae in the Ultraviolet
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalThe Astrophysical Journal
dash.depositing.authorKirshner, Robert P.::0f07c3b6230f5e5a42326bcba12a1795::600
dc.date.available2019-09-25T14:12:05Z
dash.workflow.comments1Science Serial ID 98571
dc.identifier.doi10.1088/0004-637X/721/2/1608
dash.source.volume721;2
dash.source.page1608-1626


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