Meth99et
La SN1999et dans Ngc 1643
Tableau des Mesures et Courbes de
Lumière
Extrait de l'IAUC 7304:
"SUPERNOVA 1999et IN NGC 1643:
E. Cappellaro, Osservatorio Astronomico di Padova, reports his discovery, on an
R CCD frame obtained with the Danish telescope (+
DFOSC) at the European Southern Observatory, La Silla, on Nov. 4.3 T, of a
supernova (R = 17.6) located at R.A. = 4h43m44s.0, Decl. =
-5 19'09" (equinox 2000.0), which is 5".8 west and 9".8 south of
the nucleus of NGC 1643. A spectrum obtained with same instrument
(range 330-900 nm, resolution 1 nm) shows that the object is a typical type-II
supernova, 1-2 months after maximum. The expansion
velocity measured from the well-developed P-Cyg absorption of H-alpha is about
6000 km/s."
Les mesures sans filtre peuvent être réalisées par comparaison avec la magnitude "R" des étoiles USNO
Voir la carte de champ de la SN199et dans Ngc 1643
Le suivi en images de la
SN1999et dans Ngc 1643
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s99etCH1 991115 R CHASSAGNE |
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