Type Ia

Alert Notice 515: SN 2015F in NGC 2442 (PSN J07361576-6930230)

March 31, 2015

Event: Supernova in NGC 2442: SN 2015F = PSN J07361576-6930230

Discovered by: Libert A. G. Monard, Calitzdorp, Western Cape, South Africa

Discovery magnitude: 16.8 unfiltered CCD using a 35-cm RCX400 telescope (+SBIG ST8-XME camera)

Discovery date: 2015 March 9.789 UT

Coordinates:  R.A. 07 36 15.76   Dec. -69 30 23.0  (2000.0)
SN 2015F is located 40" west and 84" north of the center of NGC 2442.

Special Notice #393: Correction to Special Notice #392 [ASASSN-14lp]

December 11, 2014: In AAVSO Special Notice #392, the name of the supernova discovered in NGC 4666 was given as ASASSN-141p. It should have been ASASSN-14lp. That is to say, the text following the dash should
be "fourteen ell pee" and not "fourteen one pee".

Please create charts and submit observations using the name ASASSN-14lp.

Sincere apologies for the error!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

Special Notice #392: ASASSN-14lp = Type Ia Supernova in NGC 4666 (Virgo)

December 11, 2014: T. W.-S. Holoien et al. announce in The Astronomer's Telegram (ATel) #6795 (http://www.astronomerstelegram.org/?read=6795) the discovery of a transient in NGC 4666 at magnitude 14.3 V on 2014 December 9.61 UT. The discovery was made in the course of the All Sky Automated Survey for SuperNovae (ASASSN) search, and the object assigned the name ASASSN-14lp. ASASSN-14lp was not seen (<15.3 V) in poor-quality ASASSN images obtained on 2104 Dec. 08.35 UT.

Special Notice #379: Supernova 2013hn in IC 4329 = PSN J13485917-3017265

December 19, 2013: IAU CBET 3762 (Daniel W. E. Green, Ed.) announces the discovery of Supernova 2013hn in IC 4329 by Ella Sanders Kot and R. Kot (Truth or Consequences, NM) and D. Coffin (University of Iowa) at unfiltered magnitude 15.2 on 2013 December 13.544 UT using the 0.37-m f/14 Rigel telescope at the Iowa Robotic Observatory near Sonoita, AZ. E. S. Kot adds that a follow-up image taken on December 16.53 shows SN 2013hn at mag 14.8 U (position end figures 59.19s, 26.9").

Alert Notice 392: Supernova 2008hy in IC 334

December 8, 2008: Further to CBETs No. 1608 (Puckett and Langoussis; Daniel W. E. Green, editor) and No. 1610 (Dennefeld et al., and Yamanaka et al.) the supernova SN 2008hy has been identified as a Type Ia supernova, and is believed to be near maximum light (V=14.3 on 2008 Dec 07.13, JD 2454807.63; T. Orff, reported by Puckett and Langoussis).  The object is located approximately 100 arcseconds NNE of the center of IC 334.

Independently obtained spectroscopy of the supernova by Dennefeld et al.

Alert Notice 479: Supernova 2013aa in NGC 5643 = PSN J14323388-4413278

February 17, 2013

Event: Supernova 2013aa in NGC 5643 = PSN J14323388-4413278

Discovered by: Stuart Parker (Canterbury, New Zealand)

Discovery Date: 2013 Feb. 13.621 UT

Discovery Magnitude
: red mag 11.9 on a 30-s unfiltered CCD image taken with a 30-cm Astro-Tech AT12RC Ritchey-Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the course of the Backyard Observatory Supernova Search (BOSS)

Special Notice #312: Supernova 2012gx in MCG -02-2-72 = PSN J00380175-1351395

November 27, 2012: IAU Central Bureau Electronic Telegram 3314 (Daniel W. E. Green, ed.) announces the discovery by A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams (California Institute of Technology); R. H. McNaught (Australian National University); J. L. Prieto (Princeton University); M. Catelan (Pontificia Universidad Catolica de Chile); and S. M. Larson and E.

Special Notice #283: Supernova 2012cg IN NGC 4424 = PSN J12271283+0925132

May 23, 2012: IAU Central Bureau Electronic Telegram 3111 (Daniel W. E. Green, ed.) announces the LOSS discovery (reported by M. Kandrashoff, S. B. Cenko, W. Li, and A. V. Filippenko) of a supernova in NGC 4424 on 2012 May 17.22 at unfiltered magnitude 16.9.

Spectra indicating the object to be a Type Ia supernova discovered about two weeks before maximum were obtained by: