Bright Supernovae - 1998.

163 (actually 1 fewer) Supernova were reported in 1998 (163 last year), 35 in NGC and IC galaxies (29 last year), 54 better than 18th Mag (36 last year). The brightest this year was 1998bu in M96 topping out at Mag 11.6, followed closely behind by 1998S at 11.9 and 1998aq at 12.0. 5 Extragalactic Novae were also reported in 1998.

1998fa, IAUC 7073 Dec 25, 1998, discovered by Lick Observatory Supernova Search Found in UGC 3513 at R.A. = 6h42m51s.51, Decl. = +41d25'18".9 Located 4".0 west and 3".8 north of the nucleus of UGC 3513 (Discovery image) (Hubert Lehmann image) (Luis Hernandez image) Mag 18.0, Type IIb-pec (References: IAUC 7077, 7090; SN 2003bq)

1998ec, IAUC 7022 Sept. 26, 1998, discovered by BAO Supernova Survey Found in UGC 3576 at R.A. = 6h53m06s.11, Decl. = +50o02'22".1 Located 8".7 west and 19".5 north of the center of UGC 3576 (G. Sala image) (Laszlo Kiss image) Mag 18.4, Type Ia (References: IAUC 7024, 7070)

1998eb, IAUC 7016 Sept. 17, 1998, discovered by Lick Observatory Supernova Search Found in NGC 1961 at R.A. = 5h42m12s.02, Decl. = +69o22'26".3 Located 38".8 east and 17".0 south of the nucleus of NGC 1961 (Discovery image) (G. Sala image) (Josep MЄ Bosch image) (Norbert Stapper image (mirror)) (Ca' Bionda Observatory image) Mag < 20.0, Type Ia (References: IAUC 7018, 7019; SN 2001is)

Nova M31 1998 2, IAUC 7015 Sept. 15, 1998, discovered by Lick Observatory Supernova Search Found in M31 at R.A. = 0h42m46s.6, Decl. = +41o14'50" Located 26" east and 78" south of the nucleus of NGC 224 (= M31) (Discovery image) (Udo Zlender image) Mag 18.5, Extragalactic Nova (References: IAUC 7018, 7023)

1998dx, IAUC 7011 Sept. 10, 1998, discovered by Lick Observatory Supernova Search Found in UGC 11149 at R.A. = 18h11m11s.89, Decl. = +49o51'40".7 Located 20".9 east and 12".2 south of the nucleus of UGC 11149 (Discovery image) (Mike Schwartz image) (Promoid Observatory image) (Norbert Stapper image) (Hans Dannhoff image) Mag 17.9, Type Ia (References: SN 2003hr)

1998dt, IAUC 7006 Sept. 1, 1998, discovered by Lick Observatory Supernova Search Found in NGC 945 at R.A. = 2h28m35s.72, Decl. = -10o32'59".8 Located 23".1 west and 39".5 south of the nucleus of NGC 945 (Discovery image) (Pedro RИ image) (Promoid Observatory image) (Ca' Bionda Observatory image) Mag 16.6, Type Ib (References: IAUC 7011)

Nova M32 1998, IAUC 7004 Aug 31, 1998, discovered by Lick Observatory Supernova Search Found in M31 at R.A. = 0h42m39s.29, Decl. = +40o51'10".3 Located 28".5 west and 44".7 south of the nucleus of NGC 221 (= M32) (Discovery image) (Marko Moilanen image) (Larry Robinson image) (Udo Zlender image) (StИphane and Didier Morata image) Mag 16.5, Extragalactic Nova (References: IAUC 7018)

1998dq, IAUC 6998 Aug 23, 1998, discovered by Brett White Found in NGC 6754 at R.A. = 19h11m23s.78, Decl. = -50o38'25".5 (5" from SN 1998X) Located 18".7 west and 5" north of the nucleus of NGC 6754 (Brendan Downs image) (VSNet 1998dq page) (Ted Dobosz image) Mag 14.6, Type Ia (Refereces: IAUC 7000; SN 1998X, 2000do)

1998dn, IAUC 6994 Aug 19, 1998, discovered by BAO Supernova Survey Found in NGC 337A at R.A. = 1h01m27s.08, Decl. = -7o36'36".7 Located 102" west and 79" south of the center of NGC 337A (Enrico Prosperi image (filtered version)) (Salvo Massaro image) (Giuseppe A. Sala image) (Ca' Bionda Observatory image) Mag 15.8, Type II

1998dm, IAUC 6993 Aug 22, 1998, discovered by Lick Observatory Supernova Search Found in MCG -01-4-044 at R.A. = 1h26m13s.97, Decl. = -6o06'14".0 (VSnet 98dm page) Located 13".8 west and 37".0 south of the nucleus of MCG -01-4-044 (Discovery image) (Enrico Prosperi image) (Salvo Massaro image) (Enrico Prosperi image) (LOSS color image) Mag 14.9, Type Ia (Refereces: IAUC 6997)

1998dl, IAUC 6992 Aug. 20, 1998, discovered by Lick Observatory Supernova Search Found in NGC 1084 at R.A. = 2h46m01s.47, Decl. = -7o34'25".1 Located 21".6 east and 11".6 north of the nucleus of NGC 1084 (Discovery image) (S. Massaro image) (F.Hernandez image) (Pedro RИ image) Mag 15.1, Type II (Refereces: IAUC 6994, 7005; SN 2009H, 1996an, 1963P)

1998dk, IAUC 6991 Aug 19, 1998, discovered by Lick Observatory Supernova Search Found in UGC 139 at R.A. = 0h14m32s.16, Decl. = -0o44'10".9 Located 5".4 east and 3".1 north of the nucleus of UGC 139 (Discovery image) (F.Hernandez image) (Mike Schwartz image) (Ca' Bionda Observatory image) Mag 15.2, Type Ia (Refereces: IAUC 6997, 7005)

1998dj, IAUC 6986 Aug. 8, 1998, discovered by Lick Observatory Supernova Search Found in NGC 788 at R.A. = 2h01m06s.92, Decl. = -6o49'04".8 Located 7".1 east and 8".6 south of the nucleus of NGC 788 (Discovery image) (VSnet 98dj web page) (F.Hernandez image) Mag 16.0, Type Ia (References: IAUC 6990)

1998di (= KL Dra), IAUC 6982 August 2, 1998, discovered by Mike Schwartz Found in MCG +10-27-012 NED01 at R.A. = 19h24m38s.19, Decl. = +59o41'46".7 Located 0".6 east and 3".8 north of the nucleus of MCG +10-27-012 NED01 (Discovery image (local mirror)) (VSnet 98di web page) Mag 16.8, NOTE: This has now been confirmed to be not a supernova, but a cataclysmic variable (dwarf nova) of the CR Boo class. This is a galactic object. (CfA Spectrum) (References: IAUC 6983, 7382)

Nova M31 1998, IAUC 6981 July 23, 1998, discovered by Lick Observatory Supernova Search Found in M31 at R.A. = 0h42m37s.00, Decl. = +41o16'56".7 (AUDE finder chart) Located 82".4 west and 47".7 north of the nucleus of NGC 224 (= M31) (Discovery image) (VSNet M31 web page) Mag 15.6, Extragalactic Nova

1998dh, IAUC 6978 July 20, 1998, discovered by Lick Observatory Supernova Search Found in NGC 7541 at R.A. = 23h14m40s.31, Decl. = +4 32'14".1 Located 53".5 west and 10".4 north of the nucleus of NGC 7541 Mag 16.5, Type Ia (CfA Spectrum) (References: IAUC 6980, 6981, 6989, 6999, 7011) SN 1998dh images subpage

1998dg, IAUC 6978 July 19, 1998, discovered by Marina Wischnjewsky Found in MCG -3-34-008 at R.A. = 13h10m23s.85, Decl.= -16o56'08".1 Located 17".5 west and 17".1 south of the nucleus of MCG -3-34-008 Mag 16, Type Ia (References: IAUC 6989)

1998de, IAUC 6977 July 23, 1998, discovered by Lick Observatory Supernova Search Found in NGC 252 at R.A. = 0h48m06s.88, Decl. = +27o37'28".5 Located 71".9 east and 3".4 north of the nucleus of NGC 252 (Discovery image) (CfA image) (Kopernik image) Mag 17.6, Type Ia-pec (CfA Spectrum) (References: IAUC 6980, 7005)

1998dd, IAUC 6974 July 18, 1998, discovered by Roberto Antezana Found in ESO 383-G78 at R.A. = 13h47m33s.95, Decl. = -33o02'31".4 Located 2".8 east and 2".5 north of the nucleus of ESO 383-G78 Mag 17, Type Unknown

1998cx, IAUC 6970 July 4, 1998, discovered by A. Wassilieff Found in NGC 6209 at R.A. = 16h54m55s.31, Decl. = -72o35'24".0 Located 10".9 west and 12".1 south of the nucleus of NGC 6209 Mag 18.3, Type Ia (References: IAUC 6976; SN 2009fz)

1998cv, IAUC 6968 June 24, 1998, discovered by Roberto Antezana Found in ESO 237-G42 at R.A. = 22h09m46s.29, Decl. = -49o47'43".0 Located 5".0 east and 12".7 north of the center of ESO 237-G42 Mag 17.5, Type Ic

1998cu, IAUC 6958 June 30, 1998, discovered by Lick Observatory Supernova Search Found in IC 1525 at R.A. = 23h59m12s.95, Decl. = +46o52'31".8 Located 29.2" west and 50.3" south of the center of IC 1525 (Discovery image) (Monte Gemelli Observatory image) Mag 18.1, Type II (References: IAUC 6970; SN 2009es)

1998ct, IAUC 6957 June 30, 1998, discovered by Mike Schwartz Found in UGC 10062 at R.A. = 15h51m11s.67, Decl. = +21o56'36".0 Located 5" west and 2" north of the center of UGC 10062 (Discovery image (local mirror)) Mag 16.1, Type IIn (References: IAUC 6964)

1998cs, IAUC 6957 June 29, 1998, discovered by Tim Puckett Found in UGC 10432 at R.A. = 16h30m39s.22, Decl. = +41o12'54".4 Located 2".2 east and 16" north of the center of UGC 10432 (Discovery image) (Spaceguard Canada image) (Ca' Bionda Observatory image) Mag 17.5, Type Ia (References: IAUC 6960, 6982, 7370)

1998cr, IAUC 6956 June 28, 1998, discovered by Tim Puckett and Alex Langoussis Found in PGC 57979 at R.A. = 16h23m17s.25, Decl. = +37o12'47".5 Located 6".0 west and 7.5" south of the center of PGC 57979 (Discovery image) (Steward Obsevatory image) (Ca' Bionda Observatory image) Mag 17.5, Type Unknown (References: IAUC 7370)

1998cp, IAUC 6954 June 21, 1998, discovered by Mike Schwartz Found in MCG +9-21-11 at R.A. = 12h31m52s.3, Decl. = +52o23'39" Located 3" east and 24" south of the center of MCG +9-21-11 (Discovery image (local mirror)) Mag 18, Type Unknown (References: IAUC 6971)

1998co, IAUC 6950 June 21, 1998, discovered by Wayne Johnson (aka Mr. Galaxy) Found in NGC 7131 at R.A. = 21h47m36s.24, Decl. = -13o10'52".3 Located 2.4" east and 4.6" north of the center of NGC 7131 (Discovery image)(CfA image) (Wayne Johnson image) Mag 16, Type Ia (CfA Spectrum) (References: IAUC 7083, 7101)

1998cn, IAUC 6944 June 17, 1998, discovered by Mike Schwartz Found in NGC 3735 at R.A. = 11h35m54s.4, Decl. = +70o32'10".2 Located 10" west and 6" north of the center of NGC 3735 (Discovery image (local mirror) (Pedro RИ image) (D. Hanzl image) (Juan Goncalves and J. Porto image) (M1 SN group images) (Ca' Bionda image) Mag 15.8, Type Ia (References: IAUC 6947, 6950)

1998cl, IAUC 6934 June 3, 1998, discovered by Mike Schwartz Found in Markarian 261 at R.A. = 13h29m59s.8, Decl. = +75o34'09".0 Located 5" west and 1" north of the center of Markarian 261 (M. Schwartz discovery image) (Ca' Bionda Observatory image) Mag 17, Type Ia (References: IAUC 6946)

1998ck, IAUC 6925 May 31, 1998, discovered by Marina Wischnjewsky Found in ESO 434-G20 at R.A. = 09h41m06s.00, Decl. = -29o06'17".7 Located 7" west and 1" south of the center of ESO 434-G20 Mag 17, Type Ia (References: IAUC 6956)

1998cj, IAUC 6921 May 21, 1998, discovered by EROS Found in NGC 4263 at R.A. = 12h19m43s.30, Decl. = -12o13'41".8 (EROS finder chart) Located 9".4 east and 10".8 south of the center of NGC 4263 (EROS Discovery image) (F.Hernandez image) Mag 17.2, Type II

1998cf, IAUC 6914 March 31, 1998, discovered by Eric Emsellem; Geoffrey Clayton, Karl Gordon Found in NGC 3504 at R.A. = 11h03m11s.21, Decl. = +27o58'21".0 Located 0.6" east and 5.3" south of the center of NGC 3504 (Discovery image) Mag 15, Type Unknown (References: IAUC 6926; SN 2001ac)

1998ce, IAUC 6912 May 19, 1998, discovered by Perth Astronomical Research Group Found in MCG -4-24-19 at R.A. = 10h10m34s.70, Decl. = -25o49'30".8 Located 9" west and 8" south of the center of MCG -4-24-19 (Discovery image) Mag 16, Type II (References: IAUC 6917, 6922, 6956)

1998cc, IAUC 6907 May 15, 1998, discovered by Lick Observatory Supernova Search Found in NGC 5172 at R.A. = 13h29m19s.31, Decl. = +17o02'42".4 Located 0" east and 24.5" south of the center of NGC 5172 (Lick Observatory Discovery image) (Colleen Gino image) (Jim Wentworth images) (Michael Schwartz image) (F.Hernandez image) Mag 18.1 (5/27:15.3), Type Ib (References: SN 2001R)

1998bw (= GRB980425), IAUC 6895 April 28, 1998, discovered by European Southern Observatory Found in ESO 184-G82 at R.A. = 19h35m03s.31, Decl. = -52o50'46".65 Located in ESO 184-G82 (APOD image) (T. Galama image) (NTT image) (ESO image (smaller version)) (SpaceViews article) (Crisian Oliveira image) Mag 14.0 (5/10:13.5), Type Ib (References: IAUC 6884, 6896, 6898, 6899, 6901, 6903, 6918, 6946, 6969, 7017, 7215)

1998bu, IAUC 6899 May 9, 1998, disovered by Mirko Villi Found in M96 at R.A. = 10h46m46s.03, Decl. = +11o50'07".1 (M. Funada detailed finder chart) (AAVSO finder chart) Located 4.3" east and 55.3" north of the center of NGC 3368 (= M96) Mag 21.1 (5/14:11.9), Type Ia (References: IAUC 6902, 6905, 6907, 6918, 6921, 6926, 6937, 6982, 7070, 7103, 7144, 7391) SN 1998bu images subpage

1998bp, IAUC 6890 April 29, 1998, discovered by Mark Armstrong Found in NGC 6495 at R.A. = 17h54m50s.74, Decl. = +18o19'50".5 Located 1" east and 13" north of the center of NGC 6495 (SN 1998bp images subpage) Mag 15.2, Type Ia (CfA Spectrum) (References: IAUC 6891, 6892, 6982) VSNet's sn1998bp web page

1998bn, IAUC 6886 April 17, 1998, discovered by Lick Observatory Supernova Search Found in NGC 4462 at R.A. = 12h29m18s.88, Decl = -23o09'49".2 (AAVSO finder chart) Located 32".3 west and 9".7 north of the center of NGC 4462 Mag 14.8, Type Ia (References: IAUC 6888, 6889, 6927, 6982) SN 1998bn images subpage

1998bm, IAUC 6882, April 21, 1998, discovered by Lick Observatory Supernova Search Found in IC 2458 at R.A. = 9h21m30s.49, Decl. = +64o14'25".4 Located 1" east and 5" north of the center of IC 2458 (Lick Observatory Discovery image) Mag 17.6, Type II VSNet's sn1998bm web page

1998ba
• NERSC and HST image

1998ar, IAUC 6877 April 14, 1998, discovered by BAO Supernova Survey Found in NGC 2916 at R.A. = 09h34m58s.86, Decl = +21o42'57".5 Located 16.9" east and 38.5" north of the center of NGC 2916 (Jim Wentworth image) (Diego Rodrigues image) (Ca' Bionda Observatory image) Mag 18.4, Type II (References: IAUC 6880)

1998aq, IAUC 6875 April 13, 1998, discovered by Mark Armstrong Found in NGC 3982 at R.A. = 11h56m25s.76, Decl. = +55o07'40".1 (Stefano Pesci detailed drawing) (AAVSO finder chart) Located 18" west and 7" north of the center of NGC 3982 Mag 19.6, Type Ia (CfA Spectrum) (CfA light curve) (References IAUC 6876, 6878, 6880, 6884, 6898, 6909, 6937, 6978, 7070, 7103) SN 1998aq Images subpage

1998an, IAUC 6871 April 6, 1998, discovered by Ron Arbour Found in UGC 3683 at R.A. = 07h08m17s.13, Decl = +46o06'54".3 Located 32" east and 3" south of the center of UGC 3683 (Ron Arbour discovery image) (Mike Schwartz image) (Marko Moilanen Image) (Philip Sullivan image) (Ron Arbour image) (Larry Robinson image) (M1 SN 1998an page) Mag 16.4, Type Ia (References IAUC 6877, 6878, 6982)

1998ab, IAUC 6858 April 1, 1998, discovered by BAO Supernova Survey Found in NGC 4704 at R.A. = 12h48m47s.24, Decl = +41o55'28".3 Located 2" east and 12" north of the center of NGC 4704 (Marko Moilanen Image) (VSnet image) (Jim Wentworth Images) (Ca' Bionda Observatory image) (L. Kiss image) Mag 17.3, Type Ia (CfA FLWO spectrum) (References IAUC 6891)

1998Y, IAUC 6850 March 16, 1998, discovered by Lick Observatory Supernova Search Found in NGC 2415 at R.A. = 7h36m56s.93, Decl = +35o14'36".0 Located 7" east and 6" north of the center of NGC 2415 (Marko Moilanen Image) (KAIT Image) Mag 18.3, Type II

1998X, IAUC 6847 March 13, 1998, discovered by Perth Astronomical Research Group Found in NGC 6754 at R.A. = 19h11.4m, Decl = -50o39" (exact coordinates not provided) Located 23.8" west and 3.1" south of the center of NGC 6754 (Discovery image) Mag 17, Type II (References: SN 1998dq, 2000do)

1998W, IAUC 6843 March 16, 1998, discovered by Lick Observatory Supernova Search Found in NGC 3075 at R.A. = 09h58m54s.83, Decl = +14o25'25".7 Located 20" west and 12" north of the center of NGC 3075 (Mike Schwartz image) (Colleen Gino Image) (Marko Moilanen Image) (KAIT Image) (Hubert Lehmann image) (Luis Hernandex and A. A. Tenerief image) (Ca' Bionda Observatory image) (Grasslands Observatory image) Mag 17.3, Type II (References IAUC 6844, 6853)

1998V, IAUC 6841 March 10, 1998, discovered by Mark Armstrong Found in NGC 6627 at R.A. = 18h22m37s.40, Decl = +15o42'08".4 Located 21" west and 21" north of the center of NGC 6627 (Mark Armstrong image) (CfA SN Image) (Marko Moilanen image) (The Astronomer 1998V page) (Luis Hernandex and A. A. Tenerief image) Mag 16.2, Type Ia (CfA SN Spectrum) (References IAUC 6844, 6891)

1998T, IAUC 6830, March 3, 1998, discovered by BAO Supernova Survey Found in NGC 3690 at R.A. = 11h28m33s.16, Decl. = +58o33'43".7 Located in NGC 3690 which has no clearly defined nucleus. Mag 13.9, Type Ib (References IAUC 6843, 6844, 6859; SN 2010P, 2010O, 2005U, 1999D, 1993G, 1992bu) Please refer to the SN1998T subpage for reference images and information on the location of SN1998T in the IC 694/NGC 3690 complex.

1998S, IAUC 6829, March 3, 1998, discovered by BAO Supernova Survey Found in NGC 3877 at R.A. = 11h46m06s.18, Decl = +47o28'55".5 (Stefano Pesci detailed drawing) Located 13.6" west and 46" south of the center of NGC 3877 Mag 18.0, Type IIn (ISN Light curve) (CfA SN Spectrum) (References IAUC 6830, 6831, 6832, 6841, 6843, 6845, 6846, 6847, 6852, 6860, 6865, 6885, 6924, 6956, 7047, 7058, 7103, 7185, 7322, 7435) SN1998S Images subpage

1998R, IAUC 6826, Feb 23, 1998, discovered by Harvard - Smithsonian Center for Astrophysics Found in UGC 6271 at R.A. = 11h14m37s.03, Decl. = +30o18'51".7 Located 3.1" west and 0.8" north of the center of UGC 6271 (Marko Moilanen Image) (Luis Hernandex and A. A. Tenerief image) Mag 16, Type II

1998E, IAUC 6817, Jan 29, 1998, discovered by Perth Astronomical Research Group Found in NGC 5161 at R.A. = 13h29m2s, Decl = -33o10' (Exact position not given) Located 3" east and 8" south of the center of NGC 5161 (Discovery image) Mag 16.5, Type IIn

1998D, IAUC 6815, Jan 28, 1998, discovered by BAO Supernova Survey Found in NGC 5440 at R.A. = 14h02m59s.28, Decl = +34o44'54".3 Located 26".1 west and 7".4 south of the center of NGC 5440 (Mike Schwartz image) (D.Buczynski image) (Josep MЄ Bosch image) (Ca' Bionda Observatory image) Mag 15.6, Type Ia (References IAUC 6823)

1998C, IAUC 6812, Jan 21, 1998, discovered by BAO Supernova Survey Found in UGC 3825 at R.A. = 7h23m34s.63, Decl. = +41o26'04".2 Located 15".5 east and 0".5 south of the center of UGC 3825 (Visseggi Observatory image) (KAIT Image) Mag 17.9, Type II (References: IAUC 6823; SN 2004es)

1998A, IAUC 6805, Jan 6, 1998, discovered by Perth Astronomical Research Group Found in IC 2627 at R.A. = 11h09m50s.33, Decl. = -23o43'43".1 Located 40" west and 10" south of the center of IC 2627 (Discovery image) Mag 17, Type II (References IAUC 6809, 6823, 6849, 7435)