R-band image of SN 1998S in NGC 3877 obtained on 1998 March 16.1 ut at t he Jacobus Kapteyn Telescope (JKT), La Palma (north is up and east is to the left).[1]
Event type
Supernova
IIn
Date
c. 50.5 million years ago
(detected 2 March 1998 by Z. Wan)
Constellation
Ursa Major
Right ascension
11h 46m 06.25s
Declination
+47° 28' 55.5"
Epoch
J2000.0
Galactic coordinates
150.7467 +65.9637
Distance
c. 50.5 million ly
Host
NGC 3877
Progenitor type
maybe Red supergiant
Colour (B-V)
~ 0.2 mag
Notable features
SN 1998S, AAVSO 1140+48
Peak apparent magnitude
12 mag
Other designations
SN 1998S, 2MASS J11460613+4728553, AAVSO 1140+48
[edit on Wikidata]
SN 1998S was a type IIn supernova that was detected in NGC 3877 in March 1998. At the time of discovery, SN 1998S was the brightest type IIn event observed,[2] although later outshone by SN 2010jl.[3]
It was discovered on 1998 March 2.68 UT in NGC 3877 by Z. Wan at a broadband (unfiltered) optical magnitude of +15.2.
Its spectrum showed prominent H and He emission lines with narrow peaks and broad wings, superimposed on a blue continuum. These narrow lines indicate the presence of a dense circumstellar medium (CSM) in the vicinity of the supernova. The high luminosity of SN1998S is due to the interaction of fast material (ejecta) with previously-expelled slowly-expanding material (CSM), which can more effectively convert kinetic energy of ejecta into radiation energy.[4]
^Fassia, A.; Meikle, W. P. S.; Vacca, W. D.; Kemp, S. N.; Walton, N. A.; Pollacco, D. L.; Smartt, S.; Oscoz, A.; Aragon-Salamanca, A.; Bennett, S.; Hawarden, T. G.; Alonso, A.; Alcalde, D.; Pedrosa, A.; Telting, J.; Arevalo, M. J.; Deeg, H. J.; Garzon, F.; Gomez-Roldan, A.; Gomez, G.; Gutierrez, C.; Lopez, S.; Rozas, M.; Serra-Ricart, M.; Zapatero-Osorio, M. R. (11 November 2000). "Optical and infrared photometry of the Type IIn SN 1998S: days 11-146". Monthly Notices of the Royal Astronomical Society. 318 (4): 1093–1104. arXiv:astro-ph/0006080. Bibcode:2000MNRAS.318.1093F. doi:10.1046/j.1365-8711.2000.03797.x. S2CID 3073301.
^Fassia, A.; Meikle, W. P. S.; Chugai, N.; Geballe, T. R.; Lundqvist, P.; Walton, N. A.; Pollacco, D.; Veilleux, S.; Wright, G. S.; Pettini, M.; Kerr, T.; Puchnarewicz, E.; Puxley, P.; Irwin, M.; Packham, C.; Smartt, S. J.; Harmer, D. (11 August 2001). "Optical and infrared spectroscopy of the type IIn SN 1998S: days 3-127". Monthly Notices of the Royal Astronomical Society. 325 (3): 907–930. arXiv:astro-ph/0011340. Bibcode:2001MNRAS.325..907F. doi:10.1046/j.1365-8711.2001.04282.x. S2CID 119514186.
^Ofek, E. O.; Zoglauer, A.; Boggs, S. E.; Barriere, N. M.; Reynolds, S. P.; Fryer, C. L.; Harrison, F. A.; Cenko, S. B.; Kulkarni, S. R.; Gal-Yam, A.; Arcavi, I.; Bellm, E.; Bloom, J. S.; Christensen, F.; Craig, W. W. (2014-01-06). "SN 2010jl: Optical to hard X-ray observations reveal an explosion embedded in a ten solar mass cocoon". The Astrophysical Journal. 781 (1): 42. arXiv:1307.2247. doi:10.1088/0004-637X/781/1/42. ISSN 0004-637X.
^Dessart, Luc (2015). "Numerical simulations of super-luminous supernovae of type IIn". MNRAS. 449 (4): 4304–4325. arXiv:1503.05463. Bibcode:2015MNRAS.449.4304D. doi:10.1093/mnras/stv609. S2CID 54221511.
SN1998S was a type IIn supernova that was detected in NGC 3877 in March 1998. At the time of discovery, SN1998S was the brightest type IIn event observed...
variables with large mass losses before exploding. SN1998S and SN 2005gl are examples of Type IIn supernovae; SN 2006gy, an extremely energetic supernova, may...
CSM interaction — as seen in some recent supernovae, including SN1998S, SN 2009ip, and SN 1993J — could "explain the peculiar evolution of iPTF14hls."...
magnitude 3.7 star Chi Ursae Majoris in Ursa Major. The Type IIn supernova SN1998S is the only supernova that has been observed within NGC 3877. NGC 3877...
and Future Celestial Kings". Sky and Telescope. 95 (4): 59–63. Bibcode:1998S&T....95d..59T. Wagman 2003, p. 73. Wagman 2003, p. 74. Wagman 2003, p. 368...
and Future Celestial Kings". Sky and Telescope. 95 (4): 59–63. Bibcode:1998S&T....95d..59T. – based on computations from HIPPARCOS data. (The calculations...