J/MNRAS/384/107 VRIJHK photometry of SN 2002cv (Elias-Rosa+, 2008)
SN 2002cv: a heavily obscured type Ia supernova.
Elias-Rosa N., Benetti S., Turatto M., Cappellaro E., Valenti S.,
Arkharov A.A., Beckman J.E., Paola A.D., Dolci M., Filippenko A.V.,
Foley R.J., Krisciunas K., Larionov V.M., Li W., Meikle W.P.S.,
Pastorello A., Valentini G., Hillebrandt W.
<Mon. Not. R. Astron. Soc., 384, 107-122 (2008)>
=2008MNRAS.384..107E 2008MNRAS.384..107E
ADC_Keywords: Supernovae ; Photometry, UBVRI ; Photometry, infrared
Keywords: supernovae: general - supernovae: individual: SN 2002cv -
vdust, extinction
Abstract:
We present VRIJHK photometry, and optical and near-infrared
spectroscopy, of the heavily extinguished Type Ia supernova (SN Ia)
2002cv, located in NGC 3190, which is also the parent galaxy of the
SN Ia 2002bo. SN 2002cv, not visible in the blue, has a total visual
extinction of 8.74±0.21mag. In spite of this, we were able to obtain
the light curves between 10 and +207d from the maximum in the I band,
and also to follow the spectral evolution, deriving its key
parameters.
We found the peak I-band brightness to be Imax=16.57±0.10mag,
the maximum absolute I magnitude to be MmaxI=18.79±0.20, and the
parameter δm15(B) specifying the width of the B-band light curve
to be 1.46±0.17mag. The latter was derived using the relations
between this parameter and δm40(I) and the time-interval
δtmax(I) between the two maxima in the I-band light curve. As
has been found for previously observed, highly extinguished SNe Ia, a
small value of 1.59±0.07 was obtained here for the ratio RV of the
total-to-selective extinction ratio for SN 2002cv, which implies a
small mean size for the grains along the line of sight towards us.
Since it was found for SN 2002bo a canonical value of 3.1, here we
present a clear evidence of different dust properties inside NGC 3190.
Description:
The fact that another SN Ia, SN 2002bo, exploded in the same galaxy a
few months before SN 2002cv, makes available pre-discovery optical and
near-IR (NIR) data and hence templates for photometric measurements
via image subtraction. SN 2002cv was observed for seven months, from
day 10.7 to +205.9 relative to I-band maximum light. Here, we present
the data collected by four different teams: University of California,
Berkeley (USA), Imperial College (UK), Padova Observatory (INAF,
Italy) and Teramo Observatory (INAF, Italy).
Objects:
-------------------------------------------------
RA (2000) DE Designation(s)
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10 18 03.68 +21 50 06.2 SN 2002cv = SN 2002cv
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 70 15 S-correction to be added to the data of
SN 2002cv in Table 3
table3.dat 68 31 Original optical photometry of SN 2002cv
table4.dat 68 31 S-corrected optical photometry of SN 2002cv
table5.dat 70 25 Original NIR photometry of SN 2002cv
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See also:
J/A+A/428/555 : UBVRIJHKs photometry of 2000cx (Sollerman+, 2004)
J/MNRAS/369/1880 : Photometry of SN 2003cg (Elias-Rosa+, 2006)
J/MNRAS/376/1301 : UBVRI light-curves of SN 2005cf (Pastorello+, 2007)
J/MNRAS/377/1531 : UBVRIJHK photometry of SN 2004eo (Pastorello+, 2007)
J/MNRAS/383/1485 : BVRI light curves of SN 2003jd (Valenti+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "DD/MM/YYYY" Obs.Date Observation date
12- 21 F10.2 d JD Julian date
23- 26 F4.1 d Phase Phase relative to Imax (JD=2452415.09)
28- 33 F6.3 mag SVmag ? S-correction to V magnitude
35- 39 F5.3 mag e_SVmag ? rms uncertainty on SVmag
41- 46 F6.3 mag SRmag ? S-correction to R magnitude
48- 52 F5.3 mag e_SRmag ? rms uncertainty on SRmag
54- 59 F6.3 mag SImag ? S-correction to I magnitude
61- 65 F5.3 mag e_SImag ? rms uncertainty on SImag
67- 70 A4 --- Inst Instrument (G1)
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 "DD/MM/YYYY" Obs.Date Observation date
12- 21 F10.2 d JD Julian date
23- 27 F5.1 d Phase Phase relative to Imax (JD=2452415.09)
29- 30 A2 --- l_Vmag [≥ ] Limit flag on Vmag
31- 35 F5.2 mag Vmag ? V magnitude
37- 38 A2 --- l_Rmag [≥ ] Limit flag on Rmag
39- 43 F5.2 mag Rmag ? R magnitude
45- 48 F4.2 mag e_Rmag ? rms uncertainty on Rmag
51- 52 A2 --- l_Imag [≥ ] Limit flag on Imag
53- 57 F5.2 mag Imag ? I magnitude
59- 62 F4.2 mag e_Imag ? rms uncertainty on Imag
65- 68 A4 --- Inst Instrument (G1)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "DD/MM/YYYY" Obs.Date Observation date
11 A1 --- n_Obs.Date [b] b for Photometric night
13- 22 F10.2 d JD Julian date
24- 28 F5.1 d Phase Phase relative to Imax (JD=2452415.09)
30- 34 F5.2 mag Jmag ? J magnitude
36- 39 F4.2 mag e_Jmag ? rms uncertainty on Jmag
42- 46 F5.2 mag Hmag ? H magnitude
48- 51 F4.2 mag e_Hmag ? rms uncertainty on Hmag
54- 58 F5.2 mag Kmag ? K magnitude
60- 63 F4.2 mag e_Kmag ? rms uncertainty on Kmag
66- 70 A5 --- Inst Instrument (G1)
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Global notes:
Note (G1): Instruments as follows:
KAIT = 0.76-m Katzman Automatic Imaging Telescope + CCD, 0.80"/pix
EKAR = 1.82-m Copernico telescope + AFOSC, 0.47"/pix
EMMI = 3.6-m ESO NTT + EMMI, 0.167"/pix
INT = 2.5-m Isaac Newton Telescope + WFC, 0.33"/pix
JKT = 1.0-m Jacob Kapteyn Telescope + JAG, 0.33"/pix
N1mT = 1-m Nickel telescope + CCD, 0.28"/pix
TNT = 0.72-m TeramoNormale Telescope + CCD, 0.46"/pix
AZT = 1.08-m AZT-24 + SWIRCAM, 1.04"/pix
AZTDP = data from Di Paola et al. (2002A&A...393L..21D 2002A&A...393L..21D) using the
same configuration as AZT
SofI = 3.6-m ESO NTT + SofI, 0.29"/pix
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-May-2008