Meth99ev
La SN1999ev dans Ngc 4274
Tableau des
mesures et Courbes
de Lumière
Les Images sont en bas de page
Extrait de la circulaire IAUC 7306
SUPERNOVA 1999ev IN NGC 4274
G. M. Hurst, Basingstoke, England, reports the discovery by Tom Boles,
Wellingborough, of a supernova (mag 14.4) on a single
unfiltered CCD frame secured for the U.K. Nova/Supernova Patrol on Nov. 7.225 UT
with a 0.36-m f/11 reflector. Boles measured the
position of SN 1999ev to be R.A. = 12h19m48s.33, Decl. = +29o37'22".2
(equinox 2000.0). M. Armstrong, Rolvenden, provides
position end figures 48s.24, 21".7 from an unfiltered CCD exposure taken
on Nov. 9.211 (mag about 14.5). Hurst notes that nothing is
visible at this location on the Vickers Deep Space CCD Atlas: North (limiting
mag about 17) or on an image obtained by M. Schwartz
(Cottage Grove, OR) on 1998 Dec. 8. P. Garnavich, S. Jha, R. Kirshner, and P.
Challis, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN 1999ev was
obtained with the Fred L. Whipple Observatory (FLWO)
1.5-m Tillinghast telescope by P. Berlind on Nov. 10.5 UT. The spectrum
confirms that the object is a supernova and indicates that
it is a type-II event past maximum. A strong H-alpha P-Cyg feature is present,
and the minimum of the absorption gives and expansion
velocity of 5300 km/s. Na I and many Fe II features are also present on a
continuum that gets brighter toward the red. CCD
images obtained by M. Holman with the FLWO 1.2-m telescope at the time of the
spectra give a brightness of V = 16.3. A measurement
of the position of the supernova yields R.A. = 12h19m48s.31, Decl. =
+29o37'20".4 (equinox 2000.0), which is 29" west and 28" north
of
the nucleus of NGC 4274.
Voir une carte
représentant les positions du champ de Ngc 4274 et d'un champ d'étoiles LONEOS
au sud de Ngc 4274
Voir le champ de la SN1999ev avec repérage des étoiles LONEOS calibrées photométriquement
Magnitudes des étoiles LONEOS du champ de Ngc 4274
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Magnitudes des étoiles LONEOS du champ de Ngc 4274 |
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V- Name RA (2000) |
Dec |
s GSC |
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B-V |
V |
V-R |
R |
V-II |
I |
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B2 1215+30 B |
12 17 44.4 |
+30 09 43 |
A |
0.56 |
14.96 |
0.37 |
14.59 |
0.75 |
14.2 |
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B2 1215+30 D |
12 18 09.0 |
+30 09 35 |
A |
0.82 |
15.89 |
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[AKS95] 666 |
12 19 05.2 |
+29 48 49 |
1991-0060g |
0.29 |
12.99 |
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[AKS95] 674 |
12 19 48.9 |
+29 41 16 |
1991-0332g |
0.67 |
12.99 |
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H 1219+305 B |
12 21 11.3 |
+30 14 56 |
G 2528-0527g |
0.64 |
14.01 |
0.4 |
13.61 |
0.79 |
13.2 |
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[AKS95] 682 |
12 21 21.3 |
+29 41 39 |
1991-0239g |
0.99 |
11.87 |
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Les étoiles du Tableau, ci-dessus et 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
Voir le champ LONEOS au sud de Ngc 4274
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Magnitudes des étoiles du champ LONEOS au sud de Ngc4274 |
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Nom |
AD |
Dec |
Nom GSC |
B-V |
V |
V-R |
R |
V-I |
I |
|
WcomA |
12h21m33.700s |
+28°13'04.00' |
GSC id:1991-1083 |
0.59 |
12.08 |
0.36 |
11.72 |
0.68 |
11.4 |
|
WcomD |
12h21m28.700s |
+28°16'37.00' |
GSC id: 1991-1052 |
1.55 |
14.81 |
0.95 |
13.86 |
2.13 |
12.7 |
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WcomC1 |
12h21m26.000s |
+28°12'31.00'' |
GSC id:.................. |
1.11 |
16.6 |
0.57 |
16.03 |
1.1 |
15.5 |
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WcomB |
12h21m13.800s |
+28°13'05.00' |
GSC id: 1991-1068 |
0.6 |
13.68 |
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P320-V |
12h21m11.900s |
+28°11'50.00'' |
GSC id:.................. |
0.85 |
16.45 |
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Le suivi en images de la SN1999ev
dans Ngc 4274
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S99evPO1 20000304.919 R PONCY |
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S99evLL1 991118.160 JM LLAPASSET |
S99evLL2 991121.172 JM LLAPASSET |
S99evLL3 991124.220 JM LLAPASSET |
S99evLL4 991125.212 JM LLAPASSET |
