J/AJ/155/201 SweetSpot DR1: 74 SNe Ia in 36 nights on WIYN+WHIRC (Weyant+, 2018)
The first data release from SweetSpot: 74 supernovae in 36 nights on WIYN+WHIRC.
Weyant A., Wood-Vasey W.M., Joyce R., Allen L., Garnavich P., Jha S.W.,
Kroboth J.R., Matheson T., Ponder K.A.
<Astron. J., 155, 201 (2018)>
=2018AJ....155..201W 2018AJ....155..201W (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Spectral types ; Redshifts ; Photometry, infrared ;
Surveys
Keywords: distance scale - infrared: stars - supernovae: general
Abstract:
SweetSpot is a 3 yr National Optical Astronomy Observatory (NOAO) survey
program to observe Type Ia supernovae (SNe Ia) in the smooth Hubble flow
with the WIYN High-resolution Infrared Camera (WHIRC) on the WIYN 3.5 m
telescope. We present data from the first half of this survey, covering
the 2011B-2013B NOAO semesters and consisting of 493 calibrated images
of 74 SNe Ia observed in the rest-frame near-infrared (NIR) in the
range 0.02<z<0.09. Because many observed supernovae require host-galaxy
subtraction from templates taken in later semesters, this release
contains only the 186 NIR (JHKs) data points for the 33 SNe Ia that do
not require host-galaxy subtraction. The sample includes four objects
with coverage beginning before the epoch of B-band maximum and 27 beginning
within 20 days of B-band maximum. We also provide photometric calibration
between the WIYN+WHIRC and Two Micron All-Sky Survey (2MASS) systems,
along with light curves for 786 2MASS stars observed alongside the SNe Ia.
This work is the first in a planned series of three SweetSpot Data
Releases. Future releases will include the full set of images from all
3 yr of the survey, including host-galaxy reference images and updated
data processing with host-galaxy reference subtraction. SweetSpot will
provide a well-calibrated sample that will help improve our ability to
standardize distance measurements to SNe Ia, examine the intrinsic
optical-NIR colors of SNe Ia at different epochs, explore the nature
of dust in other galaxies, and act as a stepping-stone for more distant,
potentially space-based surveys.
Description:
The WIYN Observatory hosts a 3.5 m telescope at Kitt Peak National
Observatory (KPNO). The Ritchey-Chretien designed telescope has two Nasmyth
ports, each of which can house one of five instruments currently available,
including WHIRC. WHIRC is a NIR (0.9-2.5 µm) imager with a 3.3' field of
view and a 0.1"/pixel scale. The instrument features a 2048x2048 Raytheon
Virgo HgCdTe detector. WHIRC is equipped with JHKs broadband filters and
10 narrowband filters-for this work, we only utilize the broadband filters.
The SweetSpot data presented in this work represent the first half of
the 3 yr survey plus the original pilot data from Weyant et al.
(2014ApJ...784..105W 2014ApJ...784..105W). Specifically, we publish data from the 2011B,
2012A, 2012B, 2013A, and 2013B semesters. We were awarded 37 effective
WIYN nights over 39 distinct calendar nights (there were 4 half nights).
We obtained usable on-sky data during 29.5 effective nights across 36
distinct calendar nights (we accounted usable time in half-night chunks).
We selected SNe Ia for follow-up based on the IAU Central Bureau for
Astronomical Telegrams (CBET) and the Astronomers Telegram. To meet our
program goals, the criteria for selection were (1) spectroscopically
confirmed as Type Ia; (2) at a phase near B-band maximum; and (3) in our
preferred redshift range of 0.02<z<0.08.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 90 74 SN Ia properties from the literature
table4.dat 101 6 Persson photometric standard stars
table7.dat 118 74 2MASS calibration stars
table8.dat 91 186 SweetSpot lightcurves
refs.dat 54 116 List of references
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See also:
B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/689/377 : SNe Ia as NIR standard candles from PAIRITEL
(Wood-Vasey+, 2008)
J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/ApJ/700/1097 : Light curve parameters of SN Ia (Hicken+, 2009)
J/A+A/523/A7 : Light curves of type Ia supernovae in SNLS (Guy+, 2010)
J/ApJ/731/120 : Intrinsic SN Ia light curves (Mandel+, 2011)
J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia SNe (Blondin+, 2012)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/ApJS/213/19 : Optical and near-IR light curves of 64 SNe (Bianco+, 2014)
J/ApJS/220/9 : CfAIR2: NIR light curves of Type Ia SNe (Friedman+, 2015)
J/MNRAS/448/1345 : YJK for Type Ia supernovae (Dhawan+, 2015)
J/AJ/154/211 : The CSP (DR3): photometry of low-z SNe Ia
(Krisciunas+, 2017)
J/ApJ/848/56 : Relationships between SNe Ia and the host galaxies
(Uddin+, 2017)
http://www.phyast.pitt.edu/~wmwv/SweetSpot/DR1_data/ : Processed data, stacks,
catalogs and light curves, are available at this website
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 23 A23 --- SN SN name
25- 26 I2 h RAh Hour of Right Ascension (J2000)
28- 29 I2 min RAm Minute of Right Ascension (J2000)
31- 36 F6.3 s RAs Second of Right Ascension (J2000)
38 A1 --- DE- Sign of the Declination (J2000)
39- 40 I2 deg DEd Degree of Declination (J2000)
42- 43 I2 arcmin DEm Arcminute of Declination (J2000)
45- 49 F5.2 arcsec DEs Arcsecond of Declination (J2000)
51- 54 A4 --- SpType Spectral type
56- 62 F7.5 --- z [0.00145/0.094] Heliocentric redshift
64- 68 A5 --- r_Class SN classification reference (see refs.dat file)
70- 74 A5 --- r_z Redshift reference (see refs.dat file)
76- 80 A5 --- r_Disc SN discovery reference (see refs.dat file)
82- 86 I5 d TBmax [55814/56619] Modified Julian Date of maximum
in the B band reported in CBET/ATel
88- 90 A3 --- LC [Yes No] Light curve presented in this first
data release from the main SweetSpot survey?
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Star Persson catalog star name (Persson et al.
1998AJ....116.2475P 1998AJ....116.2475P)
8- 23 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs)
25- 30 F6.3 mag JmagP [11.426/11.993] J band magnitude
(Persson et al. 1998AJ....116.2475P 1998AJ....116.2475P)
32- 36 F5.3 mag e_JmagP [0.005/0.009] Uncertainty in JmagP
38- 43 F6.3 mag HmagP [11.148/11.729] H band magnitude
(Persson et al. 1998AJ....116.2475P 1998AJ....116.2475P)
45- 49 F5.3 mag e_HmagP [0.005/0.009] Uncertainty in HmagP
51- 56 F6.3 mag KsmagP [11.058/11.697] Ks band magnitude
(Persson et al. 1998AJ....116.2475P 1998AJ....116.2475P)
58- 62 F5.3 mag e_KsmagP [0.005/0.008] Uncertainty in KsmagP
64- 69 F6.3 mag Jmag2 [11.441/11.939] 2MASS J band magnitude
71- 75 F5.3 mag e_Jmag2 [0.014/0.025] Uncertainty in Jmag2
77- 82 F6.3 mag Hmag2 [11.125/11.747] 2MASS H band magnitude
84- 88 F5.3 mag e_Hmag2 [0.014/0.022] Uncertainty in Hmag2
90- 95 F6.3 mag Ksmag2 [11.07/11.662] 2MASS Ks band magnitude
97-101 F5.3 mag e_Ksmag2 [0.016/0.023] Uncertainty in Ksmag2
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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- 16 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs)
18- 40 A23 --- SN SN name
42- 47 F6.3 mag JmagW [10.666/20.982]? WHIRC J band magnitude
49- 53 F5.3 mag e_JmagW [0.01/0.556]? Uncertainty in JmagW
55- 60 F6.3 mag HmagW [10.485/15.638] WHIRC H band magnitude
62- 66 F5.3 mag e_HmagW [0.01/0.037] Uncertainty in HmagW
68- 73 F6.3 mag KsmagW [11.262/15.412]? WHIRC Ks band magnitude
75- 79 F5.3 mag e_KsmagW [0.01/0.053]? Uncertainty in KsmagW
81- 86 F6.3 mag Jmag2 [10.507/16.007] 2MASS J band magnitude
88- 92 F5.3 mag e_Jmag2 [0.021/0.1] Uncertainty in Jmag2
94- 99 F6.3 mag Hmag2 [10.07/15.501] 2MASS H band magnitude
101-105 F5.3 mag e_Hmag2 [0.016/0.122] Uncertainty in Hmag2
107-112 F6.3 mag Ksmag2 [9.911/15.377] 2MASS Ks band magnitude
114-118 F5.3 mag e_Ksmag2 [0.018/0.159] Uncertainty in Ksmag2
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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- 23 A23 --- SN SN name
25- 35 F11.5 d MJD Modified Julian Date (JD-2400000.5)
37- 45 F9.5 d Phase [-5.69331/206.49175] Approximate phase
47- 52 A6 --- Filter Filter (WHIRCJ/H/K) (1)
54- 61 F8.5 mag mag [11.91697/27.31938] Magnitude in Filter
63- 69 F7.5 mag e_mag [0.01139/0.64982] Uncertainty in mag
71- 81 F11.4 --- Flux [0.1181/171084.6261] Flux in Filter (2)
83- 91 F9.4 --- e_Flux [0.0633/6833.3573] Uncertainty in Flux (2)
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Note (1): The WIYN+WHIRC Ks filter is called "WHIRCK" in SNooPy's system
transmission database. We adopt the SNooPy filter names here for future
convenience.
Note (2): Fluxes are given with respect to a zeropoint of 25:
mag=-2.5*log10(flux)+25.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Ref Reference code
7- 34 A28 --- Aut Author's name
36- 54 A19 --- Bibcode Bibcode of the reference
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 03-Dec-2018