J/A+A/706/A348 type Ia Supernova ASNOS sample (Phan+, 2026)
The ANDICAM-SOFI Near-infrared and Optical type Ia Supernova (ASNOS) sample:
Description and data release.
Phan K., Galbany L., Muller-Bravo T.E., Bose S., Burns C.R.,
Stritzinger M.D., Sorensen C.T.G., Ashall C., Castander F.J.,
Jimenez Palau C., Johansson J., Anderson J.P., Chambers K..C.,
Gromadzki M., Pessi P.J., Chen T.-W.
<Astron. Astrophys. 706, A348 (2026)>
=2026A&A...706A.348P 2026A&A...706A.348P (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, infrared ; Optical
Keywords: distance scale
Abstract:
Type Ia supernovae (SNe Ia) provide the most robust means of measuring
extragalactic distances.While most of the effort has focused on
increasing the number of SNe Ia observed in the optical, near-infrared
(NIR) observations remain scarce despite their advantages, that is,
reduced dust extinction and a more intrinsic standard candle behavior,
requiring little to no empirical corrections.
Here, we present ASNOS (ANDICAM-SOFI Near-infrared and Optical type Ia
Supernova), a dataset with sample size of 1,482 epochs in the BVRIYJH
filters from the ANDICAM instrument on the 1.3-meter SMARTS telescope
at Cerro Tololo Inter-American Observatory, along with 125 JHK epochs
from the SOFI instrument on the 3.58-meter New Technology Telescope on
the La Silla Observatory.
Additionally, we incorporate optical forced photometry from the Zwicky
Transient Facility and the Asteroid Terrestrial-impact Last Alert
System. The sample comprises 41 SNe Ia in total, including 29 normal
events, eight 1991T-like objects, and four peculiar subtypes, all
located at redshifts z<0.085.
This paper provides a detailed overview of the ASNOS sample selection,
data reduction, SN photometry, host-galaxy spectral energy
distribution construction,both global and local, and SN light-curve
fitting using three methods: SALT3-NIR, SNooPy, and BayeSN. A
companion paper will present the cosmological analysis.
Description:
SMARTS-ANDICAM optical and NIR data for 41 SNe, complemented by
NTT-SOFI NIR imaging.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 127 41 SN types, coordinates, redshifts, host names,
discovery and classification groups and
number of observations in the NIR
lc/* . 40 Individual light curves
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- SN SN name
9- 15 A7 --- Type SN type
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 28 F6.3 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 41 F5.2 arcsec DEs Declination (J2000)
43- 50 F8.6 --- z Redshift
52- 76 A25 --- Host Host name
78- 87 A10 --- Disc Discovery group
89- 99 A11 --- Class Classfication groups
101-102 I2 --- NTot Total number of observations
104-105 I2 --- NY Number of ANDICAM Y observations
107-108 I2 --- NJ Number of ANDICAM J observations
110-111 I2 --- NH Number of ANDICAM H observations
113 I1 --- NJs Number of SOFI J observations
115 I1 --- NHs Number of SOFI H observations
117 I1 --- NKs Number of SOFI K observations
119-127 A9 --- FileName Name of the light curve file in subdirectory lc
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Sequential number
5- 16 F12.6 d Time Time of observation (MJD)
18- 23 A6 --- Band Filter name (1)
25- 45 F21.15 --- Flux Flux
47- 68 F22.16 --- e_Flux Flux error
70- 73 F4.1 --- zp zeropoint
75- 78 A4 --- zpsys Magnitude system (AB or Vega)
80- 88 F9.6 mag mag Magnitude
90- 97 F8.6 mag e_mag Magnitude error
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Note (1): Filters by SN:
SN 18agk : RANDI, IANDI, J_ntt, H_ntt, K_ntt, atlasc, atlaso
SN 18aoz : BANDI, RANDI, IANDI, JANDI, HANDI , atlasc, atlaso,
SN 18ayg : BANDI, RANDI, IANDI, atlasc, atlaso,
SN 18bie : BANDI, IANDI, JANDI, HANDI , atlasc, atlaso, ztfg, ztfr
SN 18bta : BANDI, IANDI, JANDI, HANDI,
SN 18cow : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI,
SN 18dda : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, atlasc, atlaso, ztfg, ztfr
SN 18ebu : BANDI, VANDI, RANDI, IANDI, H_ntt, atlasc, atlaso
SN 18enc : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, J_ntt, H_ntt, K_ntt,
atlasc, atlaso
SN 18eov : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, J_ntt, H_ntt, K_ntt
SN 18evt : BANDI, VANDI, RANDI, IANDI, atlasc, atlaso
SN 18exb : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 18exc : BANDI, VANDI, RANDI, IANDI, J_ntt, atlasc, atlaso
SN 18hfp : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso
SN 18hgc : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, K_ntt, atlasc, atlaso
SN 18hhn : BANDI, VANDI, RANDI, IANDI, J_ntt, K_ntt, atlasc, atlaso
SN 18hjw : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 18ilu : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, J_ntt, H_ntt,
atlasc, atlaso, ztfg, ztfr
SN 18jag : BANDI, VANDI, RANDI, IANDI, JANDI, J_ntt, H_ntt
SN 18jky : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 18rw : BANDI, IANDI, JANDI, VANDI, atlaso
SN 18yu : BANDI, RANDI, IANDI, JANDI, HANDI , atlaso, ztfg
SN 19ah : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI,
atlasc, atlaso, ztfg, ztfr, ztfi
SN 19akg : BANDI, VANDI, RANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 19awq : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, J_ntt, H_ntt, K_ntt,
atlasc, atlaso, ztfg , ztfr
SN 19bdz : BANDI, VANDI, RANDI, IANDI, JANDI, HANDI, J_ntt, H_ntt,
atlasc, atlaso, ztfg, ztfr, ztfi
SN 19bus : BANDI, VANDI, RANDI, IANDI, atlasc, atlaso, ztfg, ztfr, ztfi
SN 19cvl : BANDI, RANDI, IANDI, JANDI, HANDI , VANDI , atlasc, atlaso,
SN 19cxu : BANDI, VANDI, RANDI, IANDI, ztfg, ztfr
SN 19cxx : VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 19dks : BANDI, VANDI, RANDI, IANDI, atlasc, atlaso, ztfg, ztfr
SN 19eim : IANDI
SN 19fcf : IANDI, atlasc, atlaso, ztfg, ztfr, ztfi
SN 19fmr : IANDI, JANDI, HANDI
SN 19gbx : IANDI, JANDI, HANDI, atlasc, atlaso, ztfg, ztfr
SN 19gf : BANDI, VANDI, RANDI, IANDI, J_ntt, H_ntt, atlasc, atlaso, ztfg, ztfr
SN 19gwa : IANDI, atlasc, atlaso, ztfg, ztfr, ztfi
SN 19jf : BANDI, VANDI, RANDI, IANDI, J_ntt, atlasc, atlaso, ztfg, ztfr
SN 19rm : BANDI, VANDI, RANDI, IANDI, J_ntt, J_ntt
SN 19so : BANDI, VANDI, RANDI, HANDI, IANDI, JANDI, J_ntt, H_ntt
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Acknowledgements:
Kim Phan, phan(at)ice.csic.es
(End) Kim Phan [ICE-CSIC, Spain], Patricia Vannier [CDS] 06-Dec-2025