Supernova 2002an in NGC 2575

This page is devoted to information on Supernova 2002an in NGC 2575 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page.  Information on the original web pages for many of these images can be found on the updates and links web pages.

Discovered by Japanese amateur Yasuo Sano. This supernova was found on the rise. We have a DSS Photometry reference image made by Odd Trondal.

Web pages dedicated to this SN.
• Yasuo Sano's 2002an discovery page.
• AUDE has a 2002an page in French [Translate]

The following is a list of images of this SN, in chronological order. Click on the name in the "observer" column to see the image. Times and dates are in UT unless otherwise noted. If you know of any others, please tell me!

Image Credit	Date	Mag	Filter	Comments
Discovery image	2002/01/22.522	16.1	C	Discovery, local mirror
Pepe Manteca image	2002/01/24.957	15.6	C
Odd Trondal	2002/01/25.099		C
Rafael Ferrando image	2002/01/26.892	15.5	C
Esteban Reina Lorenz	2002/01/26.969	15.6	C
Zorko ViХar and Matija Kastelic image	2002/01/30.937	15.7	C
Yasuo Sano image	2002/01/31.425	16.0	C
Rezman Obs image	2002/02/01.858		C	local mirror
Josch Hambsch image	2002/02/03.012	15.5	C
Yasuo Sano image	2002/02/06.475	16.13	C
JM Llappaset image	2002/02/08.036	16.1	CR
Esteban Reina Lorenz image	2002/02/09.920	16.1	C	w/ asteriod 1995 AJ1
Yasuo Sano image	2002/02/11.522	16.35	CR
JM Llappaset image	2002/02/11.836	16.2	CR
Yasuo Sano image	2002/02/13.413	16.35	CR
Fred Ewalt image	2002/02/15.090	16.38	C
Yasuo Sano image	2002/02/16.431	16.40	CR	Shows the evolution of this supernova
JB DE Vanssay image	2002/02/18.992	16.3	CR
Yasuo Sano image	2002/02/19.609	16.47	CR	Shows the evolution of this supernova
JM Llappaset image	2002/02/20.089	16.5	CR
JM Llappaset image	2002/03/03.880	16.5	CR
CROSS image	2002/03/04.77	16.35	CR
JB. De Vanssay image	2002/03/04.933	16.3	CR
Yasuo Sano image	2002/03/05.556	16.61	CR	Shows the evolution of this supernova
R Poncy image	2002/03/08.798	16.4	CR
JM Llappaset image	2002/03/08.834	16.3	CR
E. Barbotin image	2002/03/09.840	16.5	CR
D. Lefoulon image	2002/03/09.973	16.5	CR
R Poncy image	2002/03/10.807	16.4	CR
JM Llappaset image	2002/03/10.809	16.4	CR
R Poncy image	2002/03/12.921	16.3	CR
E. Barbotin image	2002/03/25.205	16.7	CR
Yasuo Sano image	2002/03/31.471	16.94	CR
J.B. De Vanssay image	2002/04/08.883	17.2	CR
Yasuo Sano image	2002/05/04.492	18.12	CR

Light curves and Spectra:
• Wise Observatory Spectrum.
• Yasuo Sano light curve
• Aude Measurements and light curve.
• VSNET Light curve (requires JAVA).

Other VSNet data on this SN (which will be copied here until VSNET gets it archive working again):
• [vsnet-discovery-sn 1] possible SN in NGC2575

  I would like to announce my discovery of a possible supernova in NGC 2575.

  The new object was discovered on six frames with 30 seconds exposured on Jan. 22.52 UT using 0.28-cm f/6.3 Schmidt-Cassegrain telescope and a CCD. The limiting magnitude was around 17.5. The unfilltered CCD magnitude of the new object was 16.06, and it is located 7".4 south and 38".3 east from the galaxy center.

  No star was found at the corresponding position on two frames on 1999 Feb. 16 and 2001 Jan. 4 (limiting magnitude 17.5). The object has been checked against known minor planets. No appreciable motion was detected during the 16 min observation. Further observations are encourgaed.

  The report has been sent to the CBAT. I will send an image of the new object to vsnet-sn-chart.

  discovery by Yasuo Sano. Nayoro Hokkaido Japan

• [vsnet-campaign-sn 321] SN 2002an in NGC 2575

  Dear SN watchers,

  As IAUC 7805 reported, a Japanese amateur Yasuo Sano discovered his second supernova (first was "hypernova" SN 1997ef) in the nearby galaxy. It can reach mag 15.4.

  SN 2002an was discovered on Jan. 22.52 UT, when its unfiltered red magnitude was 16.04 (private communication). It was quickly confirmed by Reiki Kushida on Jan 22.64 UT, but the announcement delayed until Jan. 24.94 UT. The position of this new object is: R.A. = 8h22m47s.76, Decl. = +24o17'41".7 (2000.0), which is about 38" east and 7" south of the nucleus of a face-on open spiral (SA(rs)cd) galaxy NGC 2575. It locates at the outermost of the disk.

  There are several foreground stars superimposed and around the galaxy. A mag 15 star exists 33" due south of the nucleus of NGC 2575. Also, a mag 15 star at 20" WNW and 67" WNW of the nucleus, the opposite side than SN.

  NGC 2575 is somewhat nearby galaxy. The expected maximum for typical SN Ia in this galaxy is mag about 15.4, taking account of the Galactic extinction. Kushida notes that it become slightly (0.1 mag) brighter on Jan. 24.729, and nothing was visible on Jan. 6 (limiting mag 18.5). If it is of type Ia, it would be some days before maximum light. Followup photometry and the earlier spectral classification is urged.

  Sincerely Yours,
  Hitoshi Yamaoka, Kyushu Univ., Japan
  yamaoka@rc.kyushu-u.ac.jp

• [vsnet-alert 7102]
• [vsnet-alert 7167] Re: SN 2002an in NGC 2575