J/ApJS/259/53 CNIa0.02 project DR1: type Ia SN z<0.02 light curves (Chen+, 2022)
The first Data Release of CNIa0.02-A Complete Nearby (redshift <0.02) sample of
Type Ia supernova light curves.
Chen P., Dong S., Kochanek C.S., Stanek K.Z., Post R.S., Stritzinger M.D.,
Prieto J.L., Filippenko A.V., Kollmeier J.A., Elias-Rosa N., Katz B.,
Tomasella L., Bose S., Ashall C., Benetti S., Bersier D., Brimacombe J.,
Brink T.G., Brown P., Buckley D.A.H., Cappellaro E., Christie G.W.,
Fraser M., Gromadzki M., Holoien T.W.-S., Hu S., Kankare E., Koff R.,
Lundqvist P., Mattila S., Milne P.A., Morrell N., Munoz J.A., Mutel R.,
Natusch T., Nicolas J., Pastorello A., Prentice S., Roth T., Shappee B.J.,
Stone G., Thompson T.A., Villanueva S., Zheng W.
<Astrophys. J. Suppl. Ser., 259, 53 (2022)>
=2022ApJS..259...53C 2022ApJS..259...53C
ADC_Keywords: Supernovae; Photometry, UBVRI
Keywords: Type Ia supernovae
Abstract:
The CNIa0.02 project aims to collect a complete, nearby sample of Type
Ia supernovae (SNe Ia) light curves, and the SNe are volume-limited
with host-galaxy redshifts zhost<0.02. The main scientific goal is
to infer the distributions of key properties (e.g., the luminosity
function) of local SNe Ia in a complete and unbiased fashion in order
to study SN explosion physics. We spectroscopically classify any SN
candidate detected by the All-Sky Automated Survey for Supernovae
(ASAS-SN) that reaches a peak brightness <16.5mag. Since ASAS-SN scans
the full sky and does not target specific galaxies, our target
selection is effectively unbiased by host-galaxy properties. We
perform multiband photometric observations starting from the time of
discovery. In the first data release (DR1), we present the optical
light curves obtained for 247 SNe from our project (including 148 SNe
in the complete sample), and we derive parameters such as the peak
fluxes, Δm15, and sBV.
Description:
We select our targets primarily based on ASAS-SN detections, and the
complete sample was collected between 2015 September 17 and 2019
January 31. We have also observed a few SNe Ia before (since 2015
January) and after this period (until 2020 January), and they are
included in DR1, but are not part of the complete sample.
CNIa0.02 DR1 includes V-band and g-band photometry from the 14cm
telescopes used to conduct the ASAS-SN survey. Immediately after the
discovery of an SN candidate that met our magnitude criteria, we
started multiband photometric observations. For most objects, this
data release contains follow-up photometry ending around 40-60days
after the optical peak. We have performed photometric follow-up
observations using a number of telescopes ranging from ∼0.3m to ∼2m
(see Table 3; Section 2 and Appendix B).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 153 247 General properties of SNe Ia in CNIa0.02 DR1
table2.dat 70 44 Host spectroscopic redshifts without available
NED information
table3.dat 67 33765 Optical photometry results
table4.dat 148 232 Light-curve parameters from SNooPy template fitting
table5.dat 86 153 Light-curve parameters From Gaussian process fitting
--------------------------------------------------------------------------------
See also:
II/183 : UBVRI Photometric Standards (Landolt 1992)
II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)
J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)
J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)
J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)
J/MNRAS/412/1419 : Nearby supernova rates (Leaman+, 2011)
J/MNRAS/412/1441 : SNe luminosity functions (Li+, 2011)
J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)
J/AJ/143/70 : Diff. reddening in MW globulars (Alonso-Garcia+, 2012)
J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/AcA/64/197 : OGLE-IV 2012-2014 transients (Wyrzykowski+, 2014)
J/MNRAS/467/1098 : ASAS-SN bright supernova catalogue 2015 (Holoien+, 2017)
J/MNRAS/471/4966 : ASAS-SN bright supernova catalogue 2016 (Holoien+, 2017)
J/MNRAS/464/2672 : ASAS-SN bright supernova catalog 2013-2014 (Holoien+, 2017)
J/AJ/154/211 : CSP (DR3): photometry of low-z SNe Ia (Krisciunas+, 2017)
J/ApJ/869/56 : Updated calibration of the CSP-I SNIa sample (Burns+, 2018)
J/MNRAS/475/193 : Foundation SN Survey first data release (Foley+, 2018)
J/ApJ/867/105 : ATLAS all-sky stellar ref. cat, ATLAS-REFCAT2 (Tonry+, 2018)
J/ApJ/902/48 : ZTF early obs. of type Ia supernovae. III. (Bulla+, 2020)
J/ApJ/895/32 : Zwicky Transient Facility BTS. I. (Fremling+, 2020)
J/MNRAS/499/1424 : Properties of 407 SNe and their 394 hosts (Hakobyan+, 2020)
J/A+A/652/A76 : Gaia Photometric Science Alerts (Hodgkin+, 2021)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 29 A29 --- Name Survey Name
31- 37 A7 --- IAU IAU identifier (YYYYaaa)
39- 40 I2 h RAh Hour of Right Ascension (J2000)
42- 43 I2 min RAm Minute of Right Ascension (J2000)
45- 50 F6.3 s RAs Second of Right Ascension (J2000)
52 A1 --- DE- Sign of the Declination (J2000)
53- 54 I2 deg DEd Degree of Declination (J2000)
56- 57 I2 arcmin DEm Arcminute of Declination (J2000)
59- 64 F6.3 arcsec DEs Arcsecond of Declination (J2000)
66- 69 I4 yr Disc.Y [2015/2020] Year of the discovery
71- 72 I2 "month" Disc.M Month of the discovery
74- 75 I2 d Disc.D Day of the discovery
77-101 A25 --- Host Host galaxy identifier
103-110 F8.6 --- zhost Host galaxy redshift (1)
111 A1 --- f_zhost [*] *: SN spectroscopic redshift (1)
112-115 A4 --- l_Vpeak [≤] Limit flag on Vpeak
116-120 F5.2 mag Vpeak [6.38/17.55]? V band magnitude at peak (2)
122-125 F4.2 mag e_Vpeak [0/0.24]? Uncertainty in Vpeak (2)
127 A1 --- ASAS? Detected by the ASAS-SN survey?
129 A1 --- Comp? SN belongs to our complete sample?
131-153 A23 --- SN SN identifier as in other tables;
column added by CDS
--------------------------------------------------------------------------------
Note (1): Heliocentric spectroscopic redshifts taken from the
NASA/IPAC Extragalactic Database (NED) or from new spectroscopic
measurements in Table 2. If the host-galaxy spectroscopic redshift is
not available, then the SN spectroscopic redshift is displayed here
instead and indicated with asterisk. ASASSN-18nt (2018ctv) was
discovered in the galaxy cluster Abell 0194 ChenR+ (2018ATel11762....1C 2018ATel11762....1C),
which was found to be not associated with any obvious galaxy in the
cluster but located in the intra-cluster light appearing to bridge
between the galaxy pair NGC545+547 and NGC541
Moral-Pombo+ (2018ATel12313....1M 2018ATel12313....1M). Here we adopt the redshift of the
galaxy cluster for ASASSN-18nt Struble & Rood (1999ApJS..125...35S 1999ApJS..125...35S).
Note (2): Peak magnitudes in V band obtained from template fitting with
max_model i in SNooPy. For targets without successful template fitting
results, if they are detected in ASAS-SN data and with redshift
z<0.02, the upper limits for the peak magnitudes derived from
available data are reported here. Dong+ (2018MNRAS.479L..70D 2018MNRAS.479L..70D)
estimated Vmax∼15.7mag for 2016brx by matching its data to the light
curves of SN 1991bg.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- SN SN identifier
13- 18 F6.4 --- zSN [0.007/0.032]? SN redshift
20- 44 A25 --- Host Host galaxy identifier
46- 53 F8.6 --- zHost [0.008/0.031] Host spectroscopic redshift
55- 68 A14 --- Inst Instrument
70 A1 --- f_Inst Flag on Inst (1)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
b = Host redshifts are obtained from the Foundation Supernova Survey
(Foley+ 2018, J/MNRAS/475/193).
c = Host redshift of 2018fhw was first reported in
Eweis+ (2018ATel11980....1E 2018ATel11980....1E).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- SN Supernova identifier
25- 37 F13.5 d JD [2456967.84/2459037.95] Julian Date
39 A1 --- l_mag 5σ upper limit flag
40- 45 F6.3 mag mag [11.64/22.87]?=99.99 Apparent magnitude in Filt
47- 52 F6.3 mag e_mag [0.004/1]? Uncertainty in mag
54 A1 --- Filt Filter used (BVRgri)
56 A1 --- Sub Image subtraction is used for photometry?
58 A1 --- Iso Isophote model is used to subtract the
host-galaxy flux?
60- 67 A8 --- Inst Photometric data source (1)
--------------------------------------------------------------------------------
Note (1): Source as follows:
ASAS-SN = the 14cm telescopes used to conduct the ASAS-SN survey
(15866 occurrences)
LCOGT1m = the 1m telescope of the Las Cumbres Observatory Global Telescope
network (10803 occurrences)
PO = two 0.6m telescopes in Sierra Remote Observatories (CA, USA) and
Mayhill (NM, USA) of the Post Observatory (3922 occurrences)
UVOT = For SNe found between 2016 October and 2018 March, we carried
out a follow-up program using the Ultra-Violet/Optical
Telescope on the Neil Gehrels Swift Observatory
(Swift; 1358 occurrences)
SMARTS = the 1.3m telescope of Small & Moderate Aperture Research
Telescope System at Cerro Tololo Inter-American Observatory
(CTIO; 1138 occurrences)
DEMONEXT = the 0.5m DEdicated MONitor of EXotransits and Transients at
Winer Observatory in Sonoita, Arizona (409 occurrences)
WFCCD = the Wide Field reimaging CCD camera on the 2.5m du Pont
telescope (56 occurrences)
LT = the 2m Liverpool Telescope IO:O instrument (49 occurrences)
LCOGT2m = the 2m telescope of the Las Cumbres Observatory Global
Telescope network (37 occurrences)
WHO = the 1m telescope at WeiHai observatory of Shandong University
(34 occurrences)
MDM = the Ohio State Multi-Object Spectrograph (OSMOS) on the 2.4m
Hiltner Telescope at the MDM observatory (28 occurrences)
SITe2K = the direct-imaging CCD camera SITe2K on the 2.5m du Pont
telescope (27 occurrences)
A77 = a 0.41m telescope at A77 observatory (19 occurrences)
ALFOSC = Alhambra Faint Object Spectrograph and Camera on the 2.56m
Nordic Optical Telescope (NOT; 19 occurrences)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- SN SN identifier (1)
24- 30 F7.2 d tpeakB-MM [36.2/1874] Max_model B band maximum date;
JD-2457000
32- 35 F4.2 d e_tpeakB-MM [0.01/6.1] Uncertainty in tpeakB-MM
37- 40 F4.2 --- sBV-MM [0.23/1.51] Max_model color-stretch parameter
42- 45 F4.2 --- e_sBV-MM [0.01/0.5] Uncertainty in sBV-MM
47- 51 F5.2 mag Bpeak-MM [11.77/19.1]? Max_model B band magnitude at
peak
53- 56 F4.2 mag e_Bpeak-MM [0.01/0.51]? Uncertainty in Bpeak-MM
58- 62 F5.2 mag gpeak-MM [12/18]? Max_model g band magnitude at peak
64- 67 F4.2 mag e_gpeak-MM [0.01/0.14]? Uncertainty in gpeak-MM
69- 73 F5.2 mag Vpeak-MM [11.7/17.6] Max_model V band magnitude at
peak
75- 78 F4.2 mag e_Vpeak-MM [0.01/0.24] Uncertainty in Vpeak-MM
80- 84 F5.2 mag rpeak-MM [11.78/17.5]? Max_model r band magnitude at
peak
86- 89 F4.2 mag e_rpeak-MM [0.01/0.44]? Uncertainty in rpeak-MM
91- 95 F5.2 mag ipeak-MM [12.2/17.6]? Max_model i band magnitude at
peak
97- 100 F4.2 mag e_ipeak-MM [0.01/0.35]? Uncertainty in ipeak-MM
102- 108 F7.2 d tpeakB-M2 [36.29/1874]? EBV_model2 B band maximum date;
JD-2457000
110- 113 F4.2 d e_tpeakB-M2 [0/6.2]? Uncertainty in tpeakB-M2
115- 118 F4.2 --- sBV-M2 [0.27/1.5]? EBV_model2 color-stretch
parameter
120- 123 F4.2 --- e_sBV-M2 [0.01/0.22]? Uncertainty in sBV-M2
125- 129 F5.2 mag E(B-V)-M2 [-0.4/1.5]? EBV_model2 host galaxy E (B-V)
131- 134 F4.2 mag e_E(B-V)-M2 [0.01/0.41]? Uncertainty in E(B-V)-M2
136- 140 F5.2 mag mu-M2 [30.49/35.8]? EBV_model2 distance modulus
142- 145 F4.2 mag e_mu-M2 [0.01/0.6]? Uncertainty in mu-M2
147- 148 A2 --- Cat Category (2)
--------------------------------------------------------------------------------
Note (1): The SN name adopts the IAU name when available or otherwise the
survey name. All the IAU and survey names are available in Table 1.
Note (2): The supernovae are categorized into different groups according to
their data coverage in terms of both wavelength and phase, and how
well they are fitted by the template light curves.
Category as follows:
C0 = Good data coverage and fitting results.
C1 = Only ASAS-SN V band data are available. SNooPy EBV_model2 fitting is
not feasible due to lack of multi-color coverage to derive host
extinction. max_model fitting has been performed, yielding reasonable
results of the peak times and magnitudes though the derived sBV
should be used with caution.
C2 = Only a small number ({~<}3) of epochs with available multi-band data.
Some of the supernovae only have multi-band light curves close to
the B-band peak, which makes it challenging to derive the decline
rate (or the light-curve width). Similarly with C1, max model fitting
gives credible results of peak times and magnitudes while the sBV
parameters should be used with caution. EBV_model2 fitting is
performed for these targets, but the fitting results have large
uncertainties owing to inadequate coverages.
C3 = The first available multi-band data point obtained {~>}30d after
the estimated B band peak. The light-curve parameters from both
max_model and EBV_model2 should be used with caution.
C4 = Decent light-curve coverage but not well-fitted by SNooPy templates.
Therefore, the best-fit parameters, especially those from EBV_model2,
should not be trusted.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- SN SN identifier (1)
24- 29 F6.1 d tmaxB [151.5/1873.5]? B band maximum date; JD-2457000
31- 33 F3.1 d e_tmaxB [0.1/1.7]? Uncertainty in tmaxB
35- 39 F5.2 mag Bpeak [11.73/18.22]? B band magnitude at peak
41- 44 F4.2 mag e_Bpeak [0.0/0.07]? Uncertainty in Bpeak
46- 49 F4.2 mag DelBm15 [0.67/2.04]? B band post-peak decline rate
51- 54 F4.2 mag e_DelBm15 [0.02/0.4]? Uncertainty in DelBm15
56- 61 F6.1 d tmaxV [37.9/1874.1]? V band maximum date; JD-2457000
63- 65 F3.1 d e_tmaxV [0.1/1.8]? Uncertainty in tmaxV
67- 71 F5.2 mag Vpeak [11.68/17.47]? V band magnitude at peak
73- 76 F4.2 mag e_Vpeak [0.0/0.07]? Uncertainty in Vpeak
78- 81 F4.2 mag DelVm15 [0.39/1.49]? V band post-peak decline rate
83- 86 F4.2 mag e_DelVm15 [0.01/0.34]? Uncertainty in DelVm15
--------------------------------------------------------------------------------
Note (1): The SN name adopts the IAU name when available or otherwise the
survey name. All the IAU and survey names are available in Table 1.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 29-Jun-2022