J/ApJ/700/331 Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
CfA3: 185 type Ia supernova light curves from the CfA.
Hicken M., Challis P., Jha S., Kirshner R.P., Matheson T., Modjaz M.,
Rest A., Wood-Vasey W.M., Bakos G., Barton E.J., Berlind P., Bragg A.,
Briceno C., Brown W.R., Caldwell N., Calkins M., Cho R., Ciupik L.,
Contreras M., Dendy K.-C., Dosaj A., Durham N., Eriksen K., Esquerdo G.,
Everett M., Falco E., Fernandez J., Gaba A., Garnavich P., Graves G.,
Green P., Groner T., Hergenrother C., Holman M.J., Hradecky V., Huchra J.,
Hutchison B., Jerius D., Jordan A., Kilgard R., Krauss M., Luhman K.,
Macri L., Marrone D., McDowell J., McIntosh D., McNamara B., Megeath T.,
Mochejska B., Munoz D., Muzerolle J., Naranjo O., Narayan G., Pahre M.,
Peters W., Peterson D., Rines K., Ripman B., Roussanova A., Schild R.,
Sicilia-Aguilar A., Sokoloski J., Smalley K., Smith A., Spahr T.,
Stanek K.Z., Barmby P., Blondin S., Stubbs C.W., Szentgyorgyi A.,
Torres M.A.P., Vaz A., Vikhlinin A., Wang Z., Westover M., Woods D.,
Zhao P.
<Astrophys. J., 700, 331-357 (2009)>
=2009ApJ...700..331H 2009ApJ...700..331H
ADC_Keywords: Supernovae ; Photometry, UBVRI ; Photometry, SDSS
Keywords: supernovae: general
Abstract:
We present multiband photometry of 185 type-Ia supernovae (SNe Ia),
with over 11500 observations. These were acquired between 2001 and
2008 at the F. L. Whipple Observatory of the Harvard-Smithsonian
Center for Astrophysics (CfA). This sample contains the largest number
of homogeneously observed and reduced nearby SNe Ia (z≲0.08)
published to date. It more than doubles the nearby sample, bringing SN
Ia cosmology to the point where systematic uncertainties dominate. Our
natural system photometry has a precision of ≲0.02mag in BVRIr'i' and
≲0.04 mag in U for points brighter than 17.5mag. We also estimate a
systematic uncertainty of 0.03mag in our SN Ia standard system
BVRIr'i' photometry and 0.07mag for U. Comparisons of our standard
system photometry with published SN Ia light curves and comparison
stars, where available for the same SN, reveal agreement at the level
of a few hundredths mag in most cases. We find that 1991bg-like SNe Ia
are sufficiently distinct from other SNe Ia in their color and
light-curve-shape/luminosity relation that they should be treated
separately in light-curve/distance fitter training samples.
Description:
The 1.2m telescope at the F. L. Whipple Observatory (FLWO) was used to
obtain the photometry presented here. The 4Shooter 2x2 CCD mosaic was
employed up until 2004 August for 64 objects of the CfA3 sample. From
2004 September to 2005 July, the 2x1 CCD mosaic Minicam was used to
observe five SNe Ia. The single-chip CCD Keplercam was used for the
remaining 116 SNe Ia beginning in 2005 September.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 93 185 SN Ia discovery data
table3.dat 120 2481 Standard system comparison star photometry
table4.dat 120 2476 Natural (instrumental) system comparison star
photometry
table5.dat 34 11499 Standard system SN light curves
table6.dat 34 11499 Natural (instrumental) system SN light curves
table7.dat 12 196 Keplercam BVr'i' passbands
table8.dat 110 134 *Direct-fit and MLCS2k2 (Jha et al. 2007,
Cat. J/ApJ/659/122) light-curve properties
table9.dat 66 134 *Δm15, Δ, and time between points
at maximum light
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Note on table8.dat, table9.dat : Well sampled light curves from the CfA3
and OLD samples that have data before maximum light in B as measured by
MLCS2k2 and measure properties directly from them, thus eliminating any
dependency on a model or template light curve. The OLD sample is the nearby
SN Ia sample as compiled in Jha et al. (2007, Cat. J/ApJ/659/122).
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)
J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)
J/ApJ/700/1097 : Improved dark energy constraints (Hicken+, 2009)
J/MNRAS/389/1577 : UBVRI absolute magnitudes of Type Ia SNe (Takanashi+, 2008)
J/AJ/136/2306 : SDSS-II SN survey, 2005 (Holtzman+, 2008)
J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)
J/AJ/133/403 : Light curve of 11 type Ia supernovae (Garg+, 2007)
J/MNRAS/376/1301 : UBVRI light-curves of SN 2005cf (Pastorello+, 2007)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/A+A/437/789 : Restframe I-band light curves of SN Ia (Nobili+, 2005)
J/AJ/112/2408 : Light Curves of 29 SNe (Hamuy+ 1996)
http://www.cfa.harvard.edu/supernova/ : CfA Supernova group home page
http://www.cbat.eps.harvard.edu/cbati.html : CBET and IAUC home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN SN Ia name
8- 20 A13 --- Gal Galaxy name
22- 31 A10 "YYYY/MM/DD" Date Discovery date
33- 34 I2 h RAh Hour of right ascension (J2000) (1)
36- 37 I2 min RAm Minute of right ascension (J2000)
39- 44 F6.3 s RAs Second of right ascension (J2000)
46 A1 --- DE- Sign of declination (J2000) (1)
47- 48 I2 deg DEd Degree of declination (J2000)
50- 51 I2 arcmin DEm Arcminute of declination (J2000)
53- 57 F5.2 arcsec DEs Arcsecond of declination (J2000)
59- 62 A4 --- Circ [CBET/IAUC] Central Bureau Electronic
Telegrams or IAU Circulars
64- 67 I4 --- Num CBET or IAUC number
69- 93 A25 --- Disc Discover
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Note (1): Positions are a weighted mean of our measured SN positions,
usually in R/r' but occasionally from V when insufficient R/r' data
were available. These are generally an improvement over the positions
reported by the discoverer.
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova designation
8- 9 I2 --- Seq Running sequence number (1)
11- 12 I2 h RAh Hour of Right Ascension (J2000)
14- 15 I2 min RAm Minute of Right Ascension (J2000)
17- 22 F6.3 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 35 F5.2 arcsec DEs Arcsecond of Declination (J2000)
37- 43 F7.4 mag Vmag ? The Johnson V band magnitude
45- 50 F6.4 mag e_Vmag ? Error in Vmag
52 I1 --- o_Vmag Number of Vmag observations
54- 60 F7.4 mag U-B ? The (U-B) color index
62- 67 F6.4 mag e_U-B ? Error in U-B
69 I1 --- o_U-B Number of U-B observations
71- 77 F7.4 mag B-V ? The (B-V) color index
79- 84 F6.4 mag e_B-V ? Error in B-V
86 I1 --- o_B-V Number of B-V observations
88- 94 F7.4 mag V-r' ? The (V-r') color index
96-101 F6.4 mag e_V-r' ? Error in V-r'
103 I1 --- o_V-r' Number of V-r' observations
105-111 F7.4 mag V-i' ? The (V-i') color index
113-118 F6.4 mag e_V-i' ? Error in V-i'
120 I1 --- o_V-i' Number of V-i' observations
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Note (1): Sources are <[HCJ2009] SN YYYYA NN>, <[HCJ2009] SN YYYYaa NN> in
Simbad.
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Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova designation
8- 9 I2 --- Filt Filter code (1)
11- 21 F11.5 d MJD Modified Julian Date
23- 28 F6.3 mag mag Standard (for table 5) or Instrumental (for
table 6) system magnitude in Filter
30- 34 F5.3 mag e_mag Error in mag
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Note (1): The Johnson UBV, Krons-Cousins RI and SDSS r'i' filters
are 1, 2, 3, 4, 5, and 13, 14, respectively.
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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- 2 A2 --- Filter Filter (B,V,r',i')
4- 6 I3 nm lambda Wavelength
8- 12 F5.3 --- Sens Photon sensitivity in Filter (1)
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Note (1): Photon sensitivity passbands are the product of detector QE,
filter transmission, primary mirror reflectivity, and secondary mirror
reflectivity (approximated as the primary mirror reflectivity).
No atmospheric term has been applied.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova designation
8- 13 F6.4 --- zCMB Redshift in the cosmic microwave background
(CMB) reference frame
15- 19 F5.2 mag mU ? The peak U magnitude (1)
21- 24 F4.2 mag e_mU ? mU uncertainty
26- 30 F5.2 mag mB ? The peak B magnitude (1)
32- 35 F4.2 mag e_mB ? mB uncertainty
37- 41 F5.2 mag mV The peak V magnitude (1)
43- 46 F4.2 mag e_mV ? mV uncertainty
48- 52 F5.2 mag B-V ? B-V color index (1)
54- 57 F4.2 mag e_B-V ? B-V uncertainty
59- 63 F5.2 mag U-B ? U-B color index (1)
65- 68 F4.2 mag e_U-B ? U-B uncertainty
70- 75 F6.4 mag AV Host-galaxy extinction (2)
77- 82 F6.4 mag e_AV AV uncertainty
84- 89 F6.4 mag E(B-V) B-V host-galaxy color excess (3)
91- 96 F6.4 mag e_E(B-V) E(B-V) uncertainty
98-103 F6.4 mag E(U-B) U-B host-galaxy color excess (3)
105-110 F6.4 mag e_E(U-B) E(U-B) uncertainty
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Note (1): The peak magnitudes, mU, mB, and mV, are measured at the
time of maximum light in each band while (B-V)Bmax and (U-B)Bmax
are measured at the time of maximum light in B. For these
measurements, the light curves were K-corrected, corrected
for Milky Way extinction, and corrected for time dilation.
Note (2): The host-galaxy extinction, AV, is from MLCS2k2 (Galactic value
of RV=1.7) and has not been removed from the peak magnitudes listed.
Note (3): The host-galaxy color excesses, EBV and EUB, are derived
from AV.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- SN Supernova designation
8- 11 F4.2 mag m15U ? Decline rate Δm15 in U band (1)
13- 16 F4.2 mag e_m15U ? m15U uncertainty
18- 21 F4.2 mag m15B ? Decline rate Δm15 in B band (1)
23- 26 F4.2 mag e_m15B ? m15B uncertainty
28- 31 F4.2 mag m15V ? Decline rate Δm15 in V band (1)
33- 36 F4.2 mag e_m15V ? m15V uncertainty
38- 43 F6.3 --- Del Light-curve shape parameter Δ (2)
44 A1 --- --- [0]
46- 50 F5.3 --- e_Del Delta uncertainty
51 A1 --- --- [0]
53- 56 F4.2 d Dt(U) ? Time between the closest point before and
the closest point after maximum light in U-band
58- 61 F4.2 d Dt(B) ? Time between the closest point before and
the closest point after maximum light in B-band
63- 66 F4.2 d Dt(V) ? Time between the closest point before and
the closest point after maximum light in V-band
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Note (1): decline rate at +15 days
Note (2): shape parameter Δ defined in MLCS2k2 (Jha et al. 2007,
Cat. J/ApJ/659/122), where the magnitude is a quadratic function
of Δ.
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History:
From electronic version of the journal
References:
Riess et al. CfA1. 1999AJ....117..707R 1999AJ....117..707R
Jha et al. CfA2. 2006AJ....131..527J 2006AJ....131..527J Cat. J/AJ/131/527
Hicken et al. CfA4. 2012ApJS..200...12H 2012ApJS..200...12H Cat. J/ApJS/200/12
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Jul-2011