J/ApJS/190/418 Light curves for 165 SNe (Ganeshalingam+, 2010)
Results of the Lick observatory supernova search follow-up photometry program:
BVRI light curves of 165 type Ia supernovae.
Ganeshalingam M., Li W., Filippenko A.V., Anderson C., Foster G.,
Gates E.L., Griffith C.V., Grigsby B.J., Joubert N., Leja J., Lowe T.B.,
Macomber B., Pritchard T., Thrasher P., Winslow D.
<Astrophys. J. Suppl. Ser., 190, 418-448 (2010)>
=2010ApJS..190..418G 2010ApJS..190..418G
ADC_Keywords: Supernovae ; Photometry
Keywords: galaxies: distances and redshifts - supernovae: general
Abstract:
We present BVRI light curves of 165 Type Ia supernovae (SNe Ia) from
the Lick Observatory Supernova Search follow-up photometry program
from 1998 through 2008. Our light curves are typically well sampled
(cadence of 3-4 days) with an average of 21 photometry epochs. We
describe our monitoring campaign and the photometry reduction pipeline
that we have developed. Comparing our data set to that of Hicken et
al., with which we have 69 overlapping supernovae (SNe), we find that
as an ensemble the photometry is consistent, with only small overall
systematic differences, although individual SNe may differ by as much
as 0.1 mag, and occasionally even more. Such disagreement in specific
cases can have significant implications for combining future large
data sets. We present an analysis of our light curves which includes
template fits of light-curve shape parameters useful for calibrating
SNe Ia as distance indicators. Assuming the B-V color of SNe Ia at 35
days past maximum light can be presented as the convolution of an
intrinsic Gaussian component and a decaying exponential attributed to
host-galaxy reddening, we derive an intrinsic scatter of
σ=0.076±0.019mag, consistent with the Lira-Phillips law. This
is the first of two papers, the second of which will present a
cosmological analysis of the data presented herein.
Description:
The images in our data set were acquired using the 0.76m KAIT and the
1m Nickel telescope, both at Lick Observatory located on Mt. Hamilton
just outside of San Jose, CA. The site typically has an average seeing
of ∼2", with some seasonal dependence. We make an effort to
spectroscopically classify and monitor newly discovered SNe with time
allocated to us on the 3m Shane telescope at Lick Observatory using
the Kast double spectrograph.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sne.dat 36 165 SNe positions from Simbad
table6.dat 48 13793 Photometry (165 SNe)
table7.dat 107 2468 Comparison stars (165 SNe)
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See also:
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
J/MNRAS/389/1577 : UBVRI absolute magnitudes of Type Ia SNe (Takanashi+, 2008)
Byte-by-byte Description of file: sne.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- SN Supernova identification
17- 18 I2 h RAh Simbad hour of right ascension (J2000)
20- 21 I2 min RAm Simbad minute of right ascension (J2000)
23- 26 F4.1 s RAs Simbad second of right ascension (J2000)
28 A1 --- DE- Simbad declination sign (J2000)
29- 30 I2 deg DEd Simbad degree of declination (J2000)
32- 33 I2 arcmin DEm Simbad arcminute of declination (J2000)
35- 36 I2 arcsec DEs Simbad arcsecond of declination (J2000)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- SN Supernova identification
17- 26 F10.2 d JD Julian date
28 A1 --- Filter [BVRI] Filter used in the observation
30- 35 F6.3 mag mag Observed magnitude in Filter
37- 41 F5.3 mag e_mag Uncertainty in mag
43- 48 A6 --- Tel Telescope used in the observation
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- SN Supernova identification
17- 19 I3 --- Seq Comparison star number
21- 22 I2 h RAh Hour of Right Ascension (J2000)
24- 25 I2 min RAm Minute of Right Ascension (J2000)
27- 31 F5.2 s RAs Second of Right Ascension (J2000)
33 A1 --- DE- Sign of the Declination (J2000)
34- 35 I2 deg DEd Degree of Declination (J2000)
37- 38 I2 arcmin DEm Arcminute of Declination (J2000)
40- 43 F4.1 arcsec DEs Arcsecond of Declination (J2000)
45- 50 F6.3 mag Bmag The B band magnitude
52- 56 F5.3 mag e_Bmag Uncertainty in Bmag
58- 59 I2 --- o_Bmag Number of observations to determine Bmag
61- 66 F6.3 mag Vmag The V band magnitude
68- 72 F5.3 mag e_Vmag Uncertainty in Vmag
74- 75 I2 --- o_Vmag Number of observations to determine Vmag
77- 82 F6.3 mag Rmag The R band magnitude
84- 88 F5.3 mag e_Rmag Uncertainty in Rmag
90- 91 I2 --- o_Rmag Number of observations to determine Rmag
93- 98 F6.3 mag Imag The I band magnitude
100-104 F5.3 mag e_Imag Uncertainty in Imag
106-107 I2 --- o_Imag Number of observations to determine Imag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Oct-2010