{"id":13547,"date":"2016-11-28T10:25:35","date_gmt":"2016-11-28T13:25:35","guid":{"rendered":"http:\/\/www.astrofisicamas.cl\/?p=13547"},"modified":"2016-11-28T10:25:35","modified_gmt":"2016-11-28T13:25:35","slug":"extensive-spectroscopy-and-photometry-of-the-type-iip-supernova-2013ej","status":"publish","type":"post","link":"https:\/\/astrofisicamas.cl\/en\/extensive-spectroscopy-and-photometry-of-the-type-iip-supernova-2013ej\/","title":{"rendered":"Extensive Spectroscopy and Photometry of the Type IIP Supernova 2013ej"},"content":{"rendered":"<style type=\"text\/css\"><!-- p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Lucida Grande'; color: #000000} --><\/style>\n<p><em><strong>G. Dhungana, R. Kehoe, J. Vinko et al., 2016,\u00a0ApJ 822 6<!--more--><\/strong><\/em><\/p>\n<p style=\"text-align: justify;\">We present extensive optical (UBV RI, ${g}^{\\prime }{r}^{\\prime }{i}^{\\prime }{z}^{\\prime }$, and open CCD) and near-infrared (ZY JH) photometry for the very nearby Type IIP SN 2013ej extending from +1 to +461 days after shock breakout, estimated to be MJD 56496.9 \u00b1 0.3. Substantial time series ultraviolet and optical spectroscopy obtained from +8 to +135 days are also presented. Considering well-observed SNe IIP from the literature, we derive UBV RIJHK bolometric calibrations from UBV RI and unfiltered measurements that potentially reach 2% precision with a B \u2212 V color-dependent correction. We observe moderately strong Si ii $\\lambda 6355$ as early as +8 days. The photospheric velocity (${v}_{{\\rm{ph}}}$) is determined by modeling the spectra in the vicinity of Fe ii $\\lambda 5169$ whenever observed, and interpolating at photometric epochs based on a semianalytic method. This gives ${v}_{{\\rm{ph}}}=4500\\pm 500$ km s\u22121 at +50 days. We also observe spectral homogeneity of ultraviolet spectra at +10\u201312 days for SNe IIP, while variations are evident a week after explosion. Using the expanding photosphere method, from combined analysis of SN 2013ej and SN 2002ap, we estimate the distance to the host galaxy to be ${9.0}_{-0.6}^{+0.4}$ Mpc, consistent with distance estimates from other methods. Photometric and spectroscopic analysis during the plateau phase, which we estimated to be 94 \u00b1 7 days long, yields an explosion energy of $0.9\\pm 0.3\\times {10}^{51}$ erg, a final pre-explosion progenitor mass of 15.2 \u00b1 4.2 ${M}_{\\odot }$ and a radius of 250 \u00b1 70 ${R}_{\\odot }$. We observe a broken exponential profile beyond +120 days, with a break point at +183 \u00b1 16 days. Measurements beyond this break time yield a 56Ni mass of 0.013 \u00b1 0.001 M ${}_{\\odot }$.<\/p>\n<p style=\"text-align: justify;\"><a href=\"http:\/\/iopscience.iop.org\/article\/10.3847\/0004-637X\/822\/1\/6\/meta\" target=\"_blank\" rel=\"noopener\">Ver o comprar esta publicaci\u00f3n<\/a><\/p>\n<style type=\"text\/css\"><!-- p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Lucida Grande'; color: #000000} --><\/style>","protected":false},"excerpt":{"rendered":"<p>G. Dhungana, R. Kehoe, J. Vinko et al., 2016,\u00a0ApJ 822 6<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_eb_attr":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-13547","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Extensive Spectroscopy and Photometry of the Type IIP Supernova 2013ej - Instituto Milenio de Astrof\u00edsica MAS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/astrofisicamas.cl\/en\/extensive-spectroscopy-and-photometry-of-the-type-iip-supernova-2013ej\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Extensive Spectroscopy and Photometry of the Type IIP Supernova 2013ej - Instituto Milenio de Astrof\u00edsica MAS\" \/>\n<meta property=\"og:description\" content=\"G. 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