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J/A+A/611/A58       SN 2007on and SN 2011iv light curves          (Gall+, 2018)

Two transitional type Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv. Gall C., Stritzinger M.D., Ashall C., Baron E., Burns C.R., Hoeflich P., Hsiao E.Y., Mazzali P.A., Phillips M.M., Filippenko A.V., Anderson J.P., Benetti S., Brown P.J., Campillay A., Challis P., Contreras C., Elias de la Rosa N., Folatelli G., Foley R.J., Fraser M., Holmbo S., Marion G.H., Morrell N., Pan Y.-C., Pignata G., Suntzeff N.B., Taddia F., Torres Robledo S., Valenti S. <Astron. Astrophys. 611, A58 (2018)> =2018A&A...611A..58G (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry, standards ; Photometry, ultraviolet ; Photometry, SDSS ; Photometry, UBV ; Photometry, infrared Keywords: supernovae: general - supernovae: individual: SN2007on - supernovae: individual: SN 2011iv - dust, extinction Abstract: We present an analysis of ultraviolet (UV) to near-infrared observations of the fast-declining Type Ia supernovae (SNe Ia) 2007on and 2011iv, hosted by the Fornax cluster member NGC 1404. The B-band light curves of SN 2007on and SN 2011iv are characterised by Δm15(B) decline-rate values of 1.96mag and 1.77mag, respectively. Although they have similar decline rates, their peak B- and H-band magnitudes differ by ∼0.60mag and ∼0.35mag, respectively. After correcting for the luminosity vs. decline rate and the luminosity vs. colour relations, the peak B-band and H-band light curves provide distances that differ by ∼14% and ∼9%, respectively. These findings serve as a cautionary tale for the use of transitional SNe Ia located in early-type hosts in the quest to measure cosmological parameters. Interestingly, even though SN 2011iv is brighter and bluer at early times, by three weeks past maximum and extending over several months, its B-V colour is 0.12mag redder than that of SN 2007on. To reconcile this unusual behaviour, we turn to guidance from a suite of spherical one-dimensional Chandrasekhar-mass delayed-detonation explosion models. In this context, 56Ni production depends on both the so-called transition density and the central density of the progenitor white dwarf. To first order, the transition density drives the luminosity-width relation, while the central density is an important second-order parameter. Within this context, the differences in the B-V colour evolution along the Lira regime suggest that the progenitor of SN 2011iv had a higher central density than SN 2007on. Description: Detailed optical and NIR light curves of SN 2007on obtained by the first phase of the Carnegie Supernova Project (CSP-I, 2004-2009; Hamuy et al., 2006PASP..118....2H) were published by Stritzinger et al. (2011, Cat. J/AJ/142/156).UV uvw2-, uvm2-, and uvw1-band imaging of both SN 2007on and SN 2011iv were obtained with Swift (+ UVOT). Photome- try of SN 2007on and SN 2011iv was computed following the method described in detail by Brown et al. (2014Ap&SS.354...89B), who use the calibration published by Breeveld et al. (2011, AIPCS, 1358, 373). The Swift UVOT images and photometry are also available as part of the Swift Optical Ultraviolet Supernova Archive (SOUSA; Brown et al. 2014Ap&SS.354...89B). Optical ugriBV-band imaging of SN 2007on and SN 2011iv was obtained with the Henrietta Swope 1.0m telescope (+ SITe3 direct CCD camera) located at the Las Campanas Observatory (LCO). The NIR YJH-band imaging of SN 2007on was obtained with the Swope (+ RetroCam) and the Irenee du Pont 2.5m (+ WIRC: Wide Field Infrared Camera) telescopes (Stritzinger et al., Cat. J/AJ/142/156), while in the case of SN 2011iv all NIR YJH-band imaging was taken with RetroCam attached to the Irenee du Pont telescope. The optical local sequence is calibrated relative to Landolt (1992AJ....104..372L) (BV) and Smith et al. (2002AJ....123.2121S) (ugri) standard-star fields observed over multiple photometric nights. The NIR J-band and H-band local sequences were calibrated relative to the Persson et al. (1998AJ....116.2475P) standard stars, while the Y- band local sequence was calibrated relative to standard Y-band magnitudes computed using a combination of stellar atmosphere models (Castelli & Kurucz, 2003, IAUSymp, 210, A20) with the J-Ks colours of the Persson et al. standard-star catalogue (Hamuy et al., 2006PASP..118....2H). Objects: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 03 38 50.90 -35 34 30.0 SN 2007on = SN 2007on 03 38 51.35 -35 35 32.0 SN 2011iv = SN 2011iv ------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 56 48 UVOT UV photometry of SN 2007on and SN 2011iv table2.dat 103 30 Optical photometry of the local sequence stars in the field of NGC 1404 in the 'standard' system table3.dat 70 30 Near-IR photometry of the local sequence stars in the field of NGC 1404 in the 'natural' system table4.dat 83 99 Optical photometry of SN 2007on and SN 2011iv in the 'natural' system table5.dat 54 82 NIR photometry of SN 2007on and SN 2011iv in the 'natural' system
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name (SN 2007on or SN 2011iv) 11- 17 F7.1 MJD MJD Modified Julian date 19- 23 F5.1 d Phase Phase, days relative to T(B)max 25- 30 F6.3 mag UVW2 ?=0 UVW2-band magnitude 32- 34 I3 mmag e_UVW2 ?=0 rms uncertainty on UVW2 36- 41 F6.3 mag UVM2 ?=0 UVM2-band magnitude 43- 45 I3 mmag e_UVM2 ?=0 rms uncertainty on UVM2 47- 52 F6.3 mag UVW1 ?=0 UVW1-band magnitude 54- 56 I3 mmag e_UVW1 ?=0 rms uncertainty on UVW1
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name (SN 2007on or SN 2011iv) 11- 12 I2 --- Star Star number 15- 16 I2 h RAh Right Ascension J2000 (hours) 18- 19 I2 min RAm Right Ascension J2000 (minutes) 21- 25 F5.2 s RAs Right Ascension J2000 (seconds) 27 A1 --- DE- Declination J2000 (sign) 28- 29 I2 deg DEd Declination J2000 (degrees) 31- 32 I2 arcmin DEm Declination J2000 (minutes) 34- 37 F4.1 arcsec DEs Declination J2000 (seconds) 39- 44 F6.3 mag umag ?=0 u-band magnitude 46- 48 I3 mmag e_umag ?=0 rms uncertainty on umag 50- 55 F6.3 mag gmag ?=0 g-band magnitude 57- 59 I3 mmag e_gmag ?=0 rms uncertainty on gmag 61- 66 F6.3 mag rmag r-band magnitude 68- 70 I3 mmag e_rmag rms uncertainty on rmag 72- 77 F6.3 mag imag i-band magnitude 79- 81 I3 mmag e_imag rms uncertainty on imag 83- 88 F6.3 mag Bmag ?=0 B-band magnitude 90- 92 I3 mmag e_Bmag ?=0 rms uncertainty on Bmag 94- 99 F6.3 mag Vmag ?=0 V-band magnitude 101-103 I3 mmag e_Vmag ?=0 rms uncertainty on Vmag
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name (SN 2007on or SN 2011iv) 11- 13 I3 --- Star Star number 15- 16 I2 h RAh Right Ascension J2000 (hours) 18- 19 I2 min RAm Right Ascension J2000 (minutes) 21- 25 F5.2 s RAs Right Ascension J2000 (seconds) 27 A1 --- DE- Declination J2000 (sign) 28- 29 I2 deg DEd Declination J2000 (degrees) 31- 32 I2 arcmin DEm Declination J2000 (minutes) 34- 37 F4.1 arcsec DEs Declination J2000 (seconds) 39- 44 F6.3 mag Ymag ?=0 Y-band magnitude 46- 48 I3 mmag e_Ymag ?=0 rms uncertainty on Ymag 50- 55 F6.3 mag Jmag ?=0 J-band magnitude 57- 59 I3 mmag e_Jmag ?=0 rms uncertainty on Jmag 61- 66 F6.3 mag Hmag ?=0 H-band magnitude 68- 70 I3 mmag e_Hmag ?=0 rms uncertainty on Hmag
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name (SN 2007on or SN 2011iv) 11- 17 F7.2 d JD Julian date (JD-2450000) 19- 24 F6.3 mag umag ?=0 u-band magnitude 26- 28 I3 mmag e_umag ?=0 rms uncertainty on umag 30- 35 F6.3 mag gmag ?=0 g-band magnitude 37- 39 I3 mmag e_gmag ?=0 rms uncertainty on gmag 41- 46 F6.3 mag rmag ?=0 r-band magnitude 48- 50 I3 mmag e_rmag ?=0 rms uncertainty on rmag 52- 57 F6.3 mag imag ?=0 i-band magnitude 59- 61 I3 mmag e_imag ?=0 rms uncertainty on imag 63- 68 F6.3 mag Bmag ?=0 B-band magnitude 70- 72 I3 mmag e_Bmag ?=0 rms uncertainty on Bmag 74- 79 F6.3 mag Vmag ?=0 V-band magnitude 81- 83 I3 mmag e_Vmag ?=0 rms uncertainty on Vmag
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name (SN 2007on or SN 2011iv) 11- 17 F7.2 d JD Julian date (JD-2450000) 19- 24 F6.3 mag Ymag ?=0 Y-band magnitude 26- 28 I3 mmag e_Ymag ?=0 rms uncertainty on Ymag 30- 35 F6.3 mag Jmag ?=0 J-band magnitude 37- 39 I3 mmag e_Jmag ?=0 rms uncertainty on Jmag 41- 46 F6.3 mag Hmag ?=0 H-band magnitude 48- 50 I3 mmag e_Hmag ?=0 rms uncertainty on Hmag 52- 54 A3 --- Tel Abbreviation of the telescope used (1)
Note (1): Telescope abbreviation as follows: SWO = Swope telescope DUP = du Pont telescope
Acknowledgements: Christa Gall, christa(at)dark-cosmology.dk
(End) Christa Gall [Aarhus Univ., Denmark], Patricia Vannier [CDS] 29-Nov-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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