Meth99eu
La Supernova 1999eu dans Ngc 1097
Tableau de
Mesures et Courbes
de lumière
Extrait de l'IAUC 7304
SUPERNOVA 1999eu IN NGC 1097
S. Nakano, Sumoto, Japan, reports the discovery by Masakatsu Aoki, Toyama, of a
supernova (mag 17.3) on seventeen unfiltered CCD
frames taken on Nov. 5 with a 0.40-m f/6 reflector, with confirming frames
taken on Nov. 6. Previous frames taken by Aoki in 1996,
1997, and 1998 show nothing at this location (limiting mag 18-19).SN 1999eu is
located at R.A. = 2h46m20s.79, Decl. = -30 19'06".1
(equinox 2000.0), which is 23" east and 157" south of the center of
NGC 1097.
P. Garnavich, S. Jha, R. Kirshner, and P. Challis, Harvard-Smithsonian Center
for Astrophysics; and B. Schmidt, Mount Stromlo
and Siding Springs Observatory, write: "A spectrum was obtained with the
Fred L. Whipple Observatory 1.5-m Tillinghast telescope by
P. Berlind on Nov. 8.3 UT, which shows that SN 1999eu is a peculiar type-II
supernova. A large number of narrow P-Cyg features are
distributed through the spectrum, and H-alpha has strong absorption bands
superimposed on its profile. Na I 589.3-nm shows a well-
developed P-Cyg profile, as does Ba II 614.2-nm. The expansion velocity
measured from the Ba II line is only 1500 km/s. The
spectrum is nearly identical to that of SN 1997D (Turatto et al. 1998, Ap.J.
Let. 498, 129), a subluminous type-II event that is
suspected of ejecting an extremely small amount of 56Ni.".
Voir la carte
de Champ avec l'identification des 5 étoiles LONEOS.
Les étoiles du Tableau, ci-dessous, sont extraites du catalogue LONEOS (Brian Skiff) téléchargeable à:
ftp://ftp.lowell.edu/pub/bas/starcats/loneos.phot
( non compressé)
ftp://ftp.lowell.edu/pub/bas/starcats/loneos.phot.gz
( compressé)
The bibliographic reference
ftp://ftp.lowell.edu/pub/bas/starcats/loneos.ref
|
Etoiles LONEOS du champ de Ngc1097 |
|
|
||
|
Nom |
B-V |
V |
V-R |
V-I |
|
Ngc1097-3 |
1.23 |
13.04 |
0.65 |
1.26 |
|
Ngc1097-1 |
0.65 |
11.45 |
0.36 |
0.71 |
|
Ngc1097-2 |
0.73 |
11.51 |
0.41 |
0.41 |
|
Ngc1097-5 |
0.68 |
13.71 |
0.4 |
0.79 |
|
Ngc1097-4 |
0.64 |
13.27 |
0.38 |
0.74 |
Le suivi en images de la SN1999eu
dans Ngc 1097
|
S99euCH4 991129.87 R CHASSAGNE |
S99euCH5 000104.757 R CHASSAGNE |
|
|
|
s99euSA1 991111.436 R SANATLLO |
s99euCH1 991113 R CHASSAGNE |
s99euCH2 991114 R CHASSAGNE |
s99euCH3 991115 R CHASSAGNE |
