2004IAUC.8413....1Z


Query : 2004IAUC.8413....1Z

2004IAUC.8413....1Z - IAU Circ., 8413, 1 (2004/September-0)

Supernova 2004et in NGC 6946.

ZWITTER T., MUNARI U. and MORETTI S.

Abstract (from CDS):

T. Zwitter, University of Ljubljana; and U. Munari, Astronomical Observatory, Padova, report the discovery by S. Moretti, on unfiltered CCD images taken on Sept. 27 with a 0.4-m telescope at Ravenna, of a bright supernova (mag 12.8) in NGC 6946. The new object is located at R.A. = 20h35m25s.33, Decl. = +60o07'17".7 (equinox 2000.0). A high-resolution spectrogram, secured on Sept. 28 with the echelle spectrograph at the 1.82-m telescope in Asiago, shows a relatively featureless spectrum with a very broad, low-contrast H_alpha emission. Sharp interstellar Na I absorption lines are observed at heliocentric radial velocities of -21.1 (± 0.7) and +45.2 (± 0.4) km/s, matching expectation for separate origin within our galaxy and NGC 6946. The equivalent width of Na I D_2 lines corresponds to a total reddening of E(B-V) = 0.41 mag, following the calibration by Munari and Zwitter (1997, A.Ap. 318, 269).

Abstract Copyright:

Journal keyword(s):

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2408 2
2 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 455 1

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2022.11.30-11:19:37

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