{"id":84,"date":"2006-02-03T01:35:43","date_gmt":"2006-02-03T09:35:43","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?p=84"},"modified":"2009-02-07T01:41:29","modified_gmt":"2009-02-07T09:41:29","slug":"supernova-discovery-2006y","status":"publish","type":"post","link":"http:\/\/jazzistentialism.com\/blog\/?p=84","title":{"rendered":"Supernova Discovery – 2006y"},"content":{"rendered":"

Our first discovery for 2006. Happy New Year SN2006y !<\/p>\n

(click on image for larger version)<\/p>\n

\"sn2006y\"<\/a><\/p>\n

<\/p>\n

Circular No. 8668
\nCentral Bureau for Astronomical Telegrams
\nINTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory,\u00a0
\nCambridge, MA 02138, U.S.A.\u00a0
\nIAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)\u00a0
\nCBAT@CFA.HARVARD.EDU (science)\u00a0
\nURL http:\/\/cfa-www.harvard.edu\/iau\/cbat.html ISSN 0081-0304\u00a0
\nPhone 617-495-7440\/7244\/7444 (for emergency use only)<\/p>\n

SUPERNOVAE 2006Y AND 2006Z
\nTwo apparent supernovae have been reported:\u00a0 2006Y by P. Luckas, O. Trondal, and M. Schwartz (cf. IAUC 8655; unfiltered CCD frames, 0.35-m Tenagra telescope at Perth) and 2006Z by the SDSS collaboration (found in spectra; communicated by M. SubbaRao, University of Chicago and Adler Planetarium; cf. IAUC 8513; r-band magnitude given below). SN2006 UT\u00a0R.A.\u00a0(2000.0)\u00a0Decl.\u00a0Mag.\u00a0Offset 2006Y\u00a0Feb. 3.58\u00a07 13 17.19\u00a0 -51 41 18.8\u00a0 17.7\u00a0 1″.7 W, 5″.2 N 2006Z\u00a0\u00a0 Feb. 1.51\u00a0\u00a0 13 44 58.07\u00a0 +26 18 25.7\u00a0 20.4\u00a0— Additional unfiltered magnitudes of 2006Y:\u00a0 Jan. 27.59 UT, [18.5; Feb. 7.60, 17.3.\u00a0 SN 2006Z, which appears to be a type-Ia supernova with an age of approximately -7 +\/- 4 days after maximum light, is coincident with the center of the host galaxy (r = 17.0 from an image taken on 2004 June 12; z = 0.1232).<\/p>\n

SUPERNOVAE 2006Y AND 2006ai<\/p>\n

N. Morrell and G. Folatelli, on behalf of the Carnegie Supernova Project, report that spectroscopy (range 380-930 nm) of SN 2006Y (cf. IAUC 8668), obtained on Feb. 27.14 UT with the Las Campanas 2.5-m du Pont telescope (+ WFCCD spectrograph), showing it to be a type-II event, nearly one month after explosion.\u00a0 A spectrum of the apparent nucleus of the host galaxy was also obtained, from which is derived a recession velocity of 10074 km\/s (redshift 0.0336 +\/- 0.0001).\u00a0 From nebular emission lines superimposed on the supernova spectrum, a slightly different redshift of 0.0333 +\/- 0.0001 is derived; using this value, an expansion velocity of 7650 km\/s for this supernova is derived from the minimum of the H_beta absorption.\u00a0 A redshift of 0.0341 +\/- 0.0002 was also measured for ESO 207-G27 (a galaxy located southeast of the supernova host). \u00a0\u00a0\u00a0\u00a0
\nA spectrum of SN 2006ai (cf. IAUC 8674), obtained on Mar. 5.12 with the same instrumental configuration, shows it to be a type-II supernova, at least one month after explosion, for which an expansion velocity of 8050 km\/s is derived from the minimum of the H_beta absorption, considering a redshift of 7426 km\/s (z = 0.0158 +\/- 0.0001) measured from emission lines in the spectrum of the host galaxy.<\/p>\n","protected":false},"excerpt":{"rendered":"

Our first discovery for 2006. Happy New Year SN2006y ! (click on image for larger version)<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[6],"tags":[],"_links":{"self":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/84"}],"collection":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=84"}],"version-history":[{"count":2,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":88,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions\/88"}],"wp:attachment":[{"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}