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Article: Ultraviolet observations of SN 1987A with the IUE satellite

TitleUltraviolet observations of SN 1987A with the IUE satellite
Authors
KeywordsStars:Individual (Sn 1987A)
Ultraviolet:Stars
Issue Date1995
Citation
Astrophysical Journal, Supplement Series, 1995, v. 99 n. 1, p. 223-261 How to Cite?
AbstractUltraviolet (λ: 1150-3300 Å) observations of SN 1987A with the IUE satellite provide a unique data set. Observations started the day after discovery, 1987 February 24 (day 1.6), and a total of 751 spectra were obtained through 1992 June 9 (day 1567). The data have been processed to generate a complete catalog of SN 1987A ultraviolet spectra. The data reduction procedure includes careful line-by-line extraction, removing hits and hot pixels, and, most importantly, a scrupulous subtraction of the contribution from stars near SN 1987A within the IUE aperture. In addition to processing the data, we have also extracted light curves, and combined them with the ground-based optical data and HST observations (day 1278 to 2431) to extend the study in both wavelength and time. The data-processing procedures of our IUE study produce results that are consistent with the HST data where they overlap, but not with the IUE study by Sanz Fernández de Córdoba (1993) because of its incorrect background subtraction. The IUE data are consistent with the ground-based Walraven V BLUW photometry, while we found that flux scale of the Soviet ASTRON satellite spectroscopic data is low by ∼ 15%. The UV flux plummeted during the earliest days of observations because of the drop in the photospheric temperature and the increase in opacity. However, after reaching a minimum of 0.04% on day 44, the UV flux increased by 175 times in its contribution to 7% of the total UVOIR bolometric luminosity at day 800. A revised set of bolometric data has been constructed which includes the contribution of UV from day 1 to day 1352. Studies of the UV colors show that the supernova started to get bluer in UV around the time when dust started to form in the ejecta. Our results are consistent with the possibility that the dust condensed may be metal-rich. © 1995. The American Astronomical Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/175121
ISSN
2015 Impact Factor: 11.257
2015 SCImago Journal Rankings: 6.522

 

DC FieldValueLanguage
dc.contributor.authorPun, CSJen_US
dc.contributor.authorKirshner, RPen_US
dc.contributor.authorSonneborn, Gen_US
dc.contributor.authorChallis, Pen_US
dc.contributor.authorNassiopoulos, Gen_US
dc.contributor.authorArquilla, Ren_US
dc.contributor.authorCrenshaw, DMen_US
dc.contributor.authorShrader, Cen_US
dc.contributor.authorTeays, Ten_US
dc.contributor.authorCassatella, Aen_US
dc.contributor.authorGilmozzi, Ren_US
dc.contributor.authorTalavera, Aen_US
dc.contributor.authorWamsteker, Wen_US
dc.contributor.authorFransson, Cen_US
dc.contributor.authorPanagia, Nen_US
dc.date.accessioned2012-11-26T08:49:19Z-
dc.date.available2012-11-26T08:49:19Z-
dc.date.issued1995en_US
dc.identifier.citationAstrophysical Journal, Supplement Series, 1995, v. 99 n. 1, p. 223-261en_US
dc.identifier.issn0067-0049en_US
dc.identifier.urihttp://hdl.handle.net/10722/175121-
dc.description.abstractUltraviolet (λ: 1150-3300 Å) observations of SN 1987A with the IUE satellite provide a unique data set. Observations started the day after discovery, 1987 February 24 (day 1.6), and a total of 751 spectra were obtained through 1992 June 9 (day 1567). The data have been processed to generate a complete catalog of SN 1987A ultraviolet spectra. The data reduction procedure includes careful line-by-line extraction, removing hits and hot pixels, and, most importantly, a scrupulous subtraction of the contribution from stars near SN 1987A within the IUE aperture. In addition to processing the data, we have also extracted light curves, and combined them with the ground-based optical data and HST observations (day 1278 to 2431) to extend the study in both wavelength and time. The data-processing procedures of our IUE study produce results that are consistent with the HST data where they overlap, but not with the IUE study by Sanz Fernández de Córdoba (1993) because of its incorrect background subtraction. The IUE data are consistent with the ground-based Walraven V BLUW photometry, while we found that flux scale of the Soviet ASTRON satellite spectroscopic data is low by ∼ 15%. The UV flux plummeted during the earliest days of observations because of the drop in the photospheric temperature and the increase in opacity. However, after reaching a minimum of 0.04% on day 44, the UV flux increased by 175 times in its contribution to 7% of the total UVOIR bolometric luminosity at day 800. A revised set of bolometric data has been constructed which includes the contribution of UV from day 1 to day 1352. Studies of the UV colors show that the supernova started to get bluer in UV around the time when dust started to form in the ejecta. Our results are consistent with the possibility that the dust condensed may be metal-rich. © 1995. The American Astronomical Society. All rights reserved.en_US
dc.languageengen_US
dc.relation.ispartofAstrophysical Journal, Supplement Seriesen_US
dc.subjectStars:Individual (Sn 1987A)en_US
dc.subjectUltraviolet:Starsen_US
dc.titleUltraviolet observations of SN 1987A with the IUE satelliteen_US
dc.typeArticleen_US
dc.identifier.emailPun, CSJ: jcspun@hkucc.hku.hken_US
dc.identifier.authorityPun, CSJ=rp00772en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-4243634809en_US
dc.identifier.volume99en_US
dc.identifier.issue1en_US
dc.identifier.spage223en_US
dc.identifier.epage261en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridPun, CSJ=7003931846en_US
dc.identifier.scopusauthoridKirshner, RP=35277140000en_US
dc.identifier.scopusauthoridSonneborn, G=7006137500en_US
dc.identifier.scopusauthoridChallis, P=7004555495en_US
dc.identifier.scopusauthoridNassiopoulos, G=14020108600en_US
dc.identifier.scopusauthoridArquilla, R=6508148812en_US
dc.identifier.scopusauthoridCrenshaw, DM=7005240827en_US
dc.identifier.scopusauthoridShrader, C=7004695386en_US
dc.identifier.scopusauthoridTeays, T=6506409036en_US
dc.identifier.scopusauthoridCassatella, A=6701793869en_US
dc.identifier.scopusauthoridGilmozzi, R=7003736092en_US
dc.identifier.scopusauthoridTalavera, A=7006090807en_US
dc.identifier.scopusauthoridWamsteker, W=7003306191en_US
dc.identifier.scopusauthoridFransson, C=7004051800en_US
dc.identifier.scopusauthoridPanagia, N=35400629400en_US

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