Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..484p&link_type=abstract
Astrophysical Journal, Part 1, vol. 247, July 15, 1981, p. 484-487. Research supported by the Servizio Attivita Spaziali.
Astronomy and Astrophysics
Astronomy
30
Galactic Nuclei, Heao 2, Spaceborne Astronomy, Spiral Galaxies, Supernovae, X Ray Sources, Galactic Structure, Luminosity, Quasars, Virgo Galactic Cluster
Scientific paper
Observations were made of M100 with the Einstein Observatory in the soft X-ray energy band 63, 73, and 234 days after the explosion of the supernova SN 1979c, and no significant detections were found corresponding to any of the four SNe in M100. Upper limits are discussed, and the detection of the nucleus and an X-ray source in the northern spiral is reported. The luminosity of the nucleus is determined at 1.5 x 10 to the 40th ergs/s. Various possibilities for the X-ray source are considered, and it is shown that it is unlikely that the source is a foreground object. In addition, the possibility of a background quasi-stellar-object or a cluster of galaxies covered by M100 is also discussed.
Maccacaro Tomasso
Palumbo Giorgio G. C.
Panagia Nino
Vettolani Giampaolo
Zamorani Gianni
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