{"id":86,"date":"2006-02-17T01:38:37","date_gmt":"2006-02-17T09:38:37","guid":{"rendered":"http:\/\/jazzistentialism.com\/blog\/?p=86"},"modified":"2009-02-07T01:41:11","modified_gmt":"2009-02-07T09:41:11","slug":"supernova-discovery-2006ai","status":"publish","type":"post","link":"https:\/\/jazzistentialism.com\/blog\/?p=86","title":{"rendered":"Supernova Discovery – 2006ai"},"content":{"rendered":"

Our second discovery for the year, and for the month of February !<\/p>\n

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

\"sn2006ai\"<\/a><\/p>\n

<\/p>\n

Electronic Telegram No. 406
\nCentral Bureau for Astronomical Telegrams
\nINTERNATIONAL ASTRONOMICAL UNION
\nM.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
\nIAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
\nCBAT@CFA.HARVARD.EDU (science)
\nURL http:\/\/cfa-www.harvard.edu\/iau\/cbat.html<\/p>\n

SUPERNOVA 2006ai IN ESO 5-G9 P. Luckas, Perth, W. Australia; O. Trondal, Oslo, Norway; and M. Schwartz, Patagonia, AZ, report the discovery of an apparent supernova on unfiltered CCD frames taken with the 0.35-m Tenagra telescope at Perth on Feb. 17.54 (at mag 16.2) and 19.52 UT (mag 16.0) in the course of the Tenagra Observatory Supernova Search. SN 2006ai is located at R.A. = 7h29m52s.16, Decl. = -84o02’20”.5 (equinox 2000.0), which is 2″.5 west and 1″.8 south of the center of ESO 5-G9 (which itself has position end figures 29m53s.77, 02’18”.7). Nothing was visible at the position of 2006ai on an image taken by Luckas on 2005 Dec. 16.79 (limiting magnitude about 18.5).<\/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).
\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 second discovery for the year, and for the month of February ! (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":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/86"}],"collection":[{"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=86"}],"version-history":[{"count":1,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/86\/revisions"}],"predecessor-version":[{"id":87,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/86\/revisions\/87"}],"wp:attachment":[{"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=86"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=86"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jazzistentialism.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=86"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}