J/MNRAS/372/1315 UBVRI photometry of SN 2004et (Sahu+, 2006)
Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et.
Sahu D.K., Anupama G.C., Srividya S., Muneer S.
<Mon. Not. R. Astron. Soc., 372, 1315-1324 (2006)>
=2006MNRAS.372.1315S 2006MNRAS.372.1315S
ADC_Keywords: Supernovae ; Photometry, UBVRI
Keywords: supernovae: general - supernovae: individual: SN 2004et -
galaxies: individual: NGC 6946
Abstract:
We present optical photometry and spectroscopy of the Type IIP
supernova SN 2004et that occurred in the nearby galaxy NGC 6946. The
observations span a time range of 8541 d after explosion. The late
time bolometric luminosity and the Hα luminosity in the nebular
phase indicate that 0.06±0.02M☉ of 56Ni was synthesized
during the explosion. The plateau luminosity, its duration and the
expansion velocity of the supernova at the middle of the plateau
indicate an explosion energy of Eexp=1.20+0.38-0.30x1051erg.
The late time light curve and the evolution of the [OI] and Hα
emission-line profiles indicate the possibility of an early dust
formation in the supernova ejecta. The luminosity of [OI] 6300,
6364Å doublet, before the dust formation phase, is found to be
comparable to that of SN 1987A at similar epochs, implying an oxygen
mass in the range 1.52M☉, and a main-sequence mass of 20M☉
for the progenitor.
Description:
SN 2004et was observed with the 2-m Himalayan Chandra Telescope (HCT)
of the Indian Astronomical Observatory (IAO), Hanle, India, using the
Himalaya Faint Object Spectrograph Camera (HFOSC).
The photometric monitoring of SN 2004et, in Bessell UBVRI filters,
began on 2004 September 29, soon after its discovery, and continued
until 2006 March 16.
The spectroscopic observations of SN 2004et started on 2004 October 16
and continued until 2005 December 30.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
20 35 25.3 +60 07 18 SN 2004et = SN 2004et
---------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 94 67 Photometric observations of SN 2004et
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See also:
II/256 : Sternberg Supernova Catalogue, 2004 version (Tsvetkov+, 2004)
J/A+A/317/423 : Revised photometry of SNIa (Patat, 1997)
J/A+A/428/555 : UBVRIJHKs photometry of 2000cx (Sollerman+, 2004)
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Date Observation date
12- 22 F11.3 d JD Julian date
24- 29 F6.2 d Phase Phase, relative to the epoch of explosion
(JD 2453270.5)
31- 36 F6.3 mag Umag ? U magnitude
38- 42 F5.3 mag e_Umag ? rms uncertainty on Umag
44- 49 F6.3 mag Bmag ? B magnitude
51- 55 F5.3 mag e_Bmag ? rms uncertainty on Bmag
57- 62 F6.3 mag Vmag ? V magnitude
64- 69 F6.4 mag e_Vmag ? rms uncertainty on Vmag
70- 75 F6.3 mag Rmag ? R magnitude
77- 81 F5.3 mag e_Rmag ? rms uncertainty on Rmag
83- 88 F6.3 mag Imag ? I magnitude
90- 94 F5.3 mag e_Imag ? rms uncertainty on Imag
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jun-2007