CBAT
This webpage is based on the M31 webpage also run by the CBAT. This webpage was begun in 2009 to address the reports of apparent M33 novae sent to the CBAT. To warrant inclusion here, we go by the same rules that govern assignment of supernova and nova designations -- namely, that multiple nights of observations must be reported (excepting where multiple observatories report confirming observations on a single night, or spectroscopy is immediately available). This page is patterned after the CBAT's Unconfirmed Supernovae webpage.
An asterisk (*) after the designation in the table below indicates that the object has been shown to not be a nova (see the associated notes).
The observations of apparent novae in M33 are listed below in plain ASCII text (with NO tabs!) in a 98-column format. The designation scheme is M33N YYYY-MMa, where YYYY is the year and MM is the 2-digit month of discovery, and 'a' is a lower-case letter (a, b, c, etc.) representing the order of discovery within that month; note that multiple lines for the same object are tabulated when there is more than one independent discovery of a particular nova (i.e., one line per discovery report). Note the following template to guide you in producing a similar list to send for inclusion.
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M33N DATE (UT) R.A. (2000.0) Decl. Mag. OFFSET REPORTER
YYYY-MMa YYYY MM DD.DDD hh mm ss.ss +oo '' ""." MM.MLx rrrD rrrD Person sending text
Above, the date (given as year, month, date in Universal Time) should be given to 0.01 or 0.001 day, with leading zeroes if appropriate, in columns 12-25. The right ascension (columns 28-38) and declination (columns 40-50) should be given to full precision (0s.01 in R.A. and 0".1 in Decl.), with leading zeroes if appropriate. The magnitude should be given to tenths in columns 53-56, with column 57 for the bandpass (and column 58 for any additional bandpass character); use usual upper- and lower-letter band letters, "H" for H-alpha narrowband magnitudes, and use "U" for unfiltered CCD. The offset (columns 60-64 for right ascension and columns 66-70 for declination) of the new object from the center of M33 should be given in arc seconds for both R.A. and Decl., with the values given to 0".1 and the directional letters (E = east = 90 degrees clockwise from north toward south, and W = west for R.A. offsets; N = north and S = south for Decl. offsets) specified. The person(s) who actually send the e-mail with the discovery should be placed (first initial, full last name) in columns 75-93. Columns 95-98 contains the number for the note that will contain additional information (including the name of the survey, any other contributing astronomers, and important succinct details regarding reference images and their dates and limiting magnitudes, etc.); the appropriate sequential designation number and letter will be added by the webmaster.
For reference, the nucleus or core of M33 = NGC 598 is located at R.A. = 1h33m50s.9, Decl. = +30o39'37" (equinox 2000.0; based on the precise positions and offsets for 2001-11a, 2003-09a, and 2009-01a).
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M33N DATE (UT) R.A. (2000.0) Decl. Mag. OFFSET REPORTER
2001-11a 2001 11 15.762 01 33 42.84 +30 40 53.0 16.5U 104W 76N O. Trondal
2003-09a 2003 09 01.4 01 33 51.16 +30 39 50.2 16.9U 3E 14N W. Li
2006-09a 2006 09 28.20 01 33 18.66 +30 49 49.2 17.3U 416W 613N R. Quimby
2006-09a 2006 09 30.684 01 33 18.74 +30 49 48.1 16.6U S. Nakano
2007-09a 2007 09 18.63 01 33 58.65 +30 57 34.2 17.1U S. Nakano (Nishiyama)
2007-09a 2007 09 18.677 01 33 58.69 +30 57 34.4 16.5U S. Nakano
2007-09a 2007 09 19.501 01 33 58.63 +30 57 34.9 16.2R S. Nakano (Nishiyama)
2007-09a 2007 09 19.503 01 33 58.65 +30 57 34.4 16.8U S. Nakano (Itagaki)
2007-09a 2007 09 19.896 01 33 58.64 +30 57 34.6 17.0U F. Kugel
2008-02a 2008 02 27.47 01 34 16.42 +30 39 28.6 16.5U 330E 8S S. Nakano
2009-01a 2009 01 07.5359 01 33 40.39 +30 25 42.0 17.0U 136W 835S S. Nakano
2009-01a 2009 01 08.4748 01 33 40.45 +30 25 42.2 17.8U S. Nakano
2010-07a 2010 07 17.7977 01 33 36.86 +30 46 22.2 17.2U 181W 405N K. Nishiyama
2010-07a 2010 07 18.3584 01 33 36.83 +30 46 22.2 16.5U T. Yusa
2010-07a 2010 07 18.7827 01 33 36.85 +30 46 22.2 17.1U K. Nishiyama
2010-10a 2010 10 26.654 01 33 57.12 +30 45 53.2 18.1U 80E 377N K. Nishiyama
2010-11a 2010 11 27.5297 01 33 27.55 +30 17 28.4 18.6U J. Ruan
2010-11a 2010 11 28.542 01 33 27.54 +30 17 28.4 16.7U 301W 1329S K. Nishiyama
2010-11a 2010 11 29.064 01 33 27.55 +30 17 28.5 16.1U 301W 1329S T. Yusa
2010-12a 2010 12 17.421 01 34 17.98 +30 43 58.3 16.6U 350E 261N T. Yusa
2010-12a 2010 12 17.645 01 34 18.01 +30 43 58.0 16.4U S. Nakano (Itagaki)
2010-12a 2010 12 17.647 01 34 18.03 +30 43 58.3 16.7U S. Nakano (Kadota)
2010-12a 2010 12 18.357 01 34 18.01 +30 43 58.2 17.7U S. Nakano (Itagaki)
2010-12a 2010 12 18.486 01 34 18.02 +30 43 58.1 17.2U K. Nishiyama
NOTES:
(2001-11a) Discovered by O. Trondal (Oslo, Norway). Additional approximate unfiltered
magnitudes from M. Schwartz (via W. Li): Nov. 12.2 UT, [19.0 (M. Schwartz); 17.2, 17.
Details on IAUC 7756.
(2003-09a) Discovered by M. Ganeshalinam and W. Li (University of California) on
unfiltered KAIT images taken at Lick Observatory. Additional magnitudes for M33N
2003-09a: Aug. 24.4 UT, [19.5 (KAIT); 28.95, 20 (A. Shporer, E. O. Ofek, and T. Mazeh,
Wise Observatory); Sept. 3.05, V = 16.9 (Shporer et al.); 4.4, 17.0 (KAIT); 6.4, 17.1 (KAIT).
Spectroscopy on Sept. 13 by G. J. Schwarz et al. confirms this to be a classical nova
(apparently of the "Fe II" class). Details on IAUCs 8195, 8199, and 8234.
(2006-09a) Discovered independently by R. Quimby et al. (McDonald Observatory, 0.45-m
ROTSE-IIIb telescope) and by K. Itagaki (Teppo-cho, Yamagata, Japan; via S. Nakano, Sumoto).
Addtional unfiltered magnitudes: 2005 July-2006 Jan., [19.0 (co-added ROTSE-IIIb images);
2006 Sept. 23.69, [18.5 (Itagaki); 29.20, 16.9 (ROTSE-IIIb). Details on CBET 655.
(2007-09a) Discovered by K. Nishiyama and F. Kabashima (communicated by S. Nakano);
the tabulated position and magnitude above for Sept. 18.63 UT was measured by the discoverers,
while the image taken by the discoverers for Sept. 18.677 (also tabulated above) was
measured by Nakano. The position and magnitude tabulated above for M33N 2007-09a on
Sept. 19.503 are from K. Itagaki (Teppo-cho, Yamagata, Japan; via Nakano); the data
for Sept. 19.501 above are from K. Nishiyama et al. (Bisei 1.0-m reflector; via Nakano).
Spectroscopy on Sept. 20.35 by R. M. Wagner et al. shows this to be a "fast He/N-class"
nova. Details on CBETs 1074 and 1080.
(2008-02a) Discovered by K. Nishiyama and F. Kabashima (communicated by S. Nakano), who
provide the following additional magnitudes: Feb. 20.488 and 21.496 UT, [18.0; 28.45, 16.7.
Spectroscopy by F. Di Mille et al. on Mar. 2.80 show it to be a nova of the "Fe II" class.
Details on CBETs 1272 and 1284.
(2009-01a) Discovered by Koichi Nishiyama (Kurume, Fukuoka-ken, Japan) and Fujio Kabashima
(Miyaki-cho, Saga-ken, Japan) on nine 40-s unfiltered CCD frames taken around 2009 Jan.
7.54 UT using a 0.40-m f/9.8 reflector (limiting magnitude 18.3). Available magnitudes
for M33N 2009-01a: Jan. 2.55 UT, [19.5; 3.53, [19.4; 7.536, 17.0; 8.475, 17.8. Communicated
by S. Nakano, Sumoto, Japan (details on CBET 1659).
(2010-07a) Discovered by Koichi Nishiyama and Fujio
Kabashima of Japan. Details on CBET 2375.
(2010-10a) Discovered by Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan).
A. W. Shafter et al. report that spectroscopy indicates this nova to be a member of the "Fe
IIb" or "hybrid" spectroscopic class. Details on CBET 2533.
(2010-11a) Discovered by Jiangao Ruan (Fangchenggang, Guangxi, China) and Xing Gao (Urumqi,
Xinjiang, China) on several 60-s and 120-s survey images (limiting mag about 19.5) taken
by Xing Gao in the course of the Xingming Observatory Sky Survey using an unfiltered CCD
camera with a Celestron C14 Schmidt-Cassegrain telescope at Mt. Nanshan. Discovered
independently by Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) on eight
40-s unfiltered CCD frames (limiting magnitude 19.4) taken with a Meade 200R 0.40-m f/9.8
reflector (+ SBIG STL1001E camera). Details on CBET 2559.
(2010-12a) Discovered by T. Yusa (Osaki, Miyagi, Japan). Details on CBET 2595.
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