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J/A+A/611/A25       Updated Type II supernova Hubble diagram       (Gall+, 2018)

An updated Type II supernova Hubble diagram. Gall E.E.E., Kotak R., Leibundgut B., Taubenberger S., Hillebrandt W., Kromer M., Burgett W.S., Chambers K., Flewelling H., Huber M.E., Kaiser N., Kudritzki R.P., Magnier E.A., Metcalfe N., Smith K., Tonry J.L., Wainscoat R.J., Waters C. <Astron. Astrophys. 611, A25 (2018)> =2018A&A...611A..25G (SIMBAD/NED BibCode)
ADC_Keywords: Supernovae ; Photometry Keywords: supernovae: general - distance scale Abstract: We present photometry and spectroscopy of nine Type II-P/L supernovae (SNe) with redshifts in the 0.045~<z~<0.335 range, with a view to re-examining their utility as distance indicators. Specifically, we apply the expanding photosphere method (EPM) and the standardized candle method (SCM) to each target, and find that both methods yield distances that are in reasonable agreement with each other. The current record-holder for the highest-redshift spectroscopically confirmed SN II-P is PS1-13bni (z=0.335+0.009-0.012), and illustrates the promise of Type II SNe as cosmological tools. We updated existing EPM and SCM Hubble diagrams by adding our sample to those previously published. Within the context of Type II SN distance measuring techniques, we investigated two related questions. First, we explored the possibility of utilising spectral lines other than the traditionally used FeII λ5169 to infer the photospheric velocity of SN ejecta. Using local well-observed objects, we derive an epoch-dependent relation between the strong Balmer lines Hα, Hβ and FeII λ5169 velocities that is applicable 30 to 40 days post-explosion. Motivated in part by the continuum of key observables such as rise time and decline rates exhibited from II-P to II-L SNe, we assessed the possibility of using Hubble-flow Type II-L SNe as distance indicators. These yield similar distances as the Type II-P SNe. Although these initial results are encouraging, a significantly larger sample of SNe II-L would be required to draw definitive conclusions. Description: Photometric parameters for 9 Type IIP and IIL supernovae: SN 2013ca, PS1-13wr, PS1-14vk, PS1-12bku, PS1-13abg, PS1-13baf, PS1-13bmf, PS1-13atm and PS1-13bni. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 120 11 Sample of intermediate redshift Type II-P/L SNe sn2013ca.dat 50 6 SN 2013ca photometric observations ps112bku.dat 50 60 PS1-12bku photometric observations ps113abg.dat 50 34 PS1-13abg photometric observations ps113atm.dat 50 13 PS1-13atm photometric observations ps113baf.dat 50 76 PS1-13baf photometric observations ps113bmf.dat 50 36 PS1-13bmf photometric observations ps113bni.dat 50 74 PS1-13bni photometric observations ps113wr.dat 50 113 PS1-13wr photometric observations ps114vk.dat 50 52 PS1-14vk photometric observations
See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- SN SN name 11- 15 A5 --- Type Type 17- 18 I2 h RAh Right ascension (J2000) 20- 21 I2 min RAm Right ascension (J2000) 23- 27 F5.2 s RAs Right ascension (J2000) 29 A1 --- DE- Declination sign (J2000) 30- 31 I2 deg DEd Declination (J2000) 33- 34 I2 arcmin DEm Declination (J2000) 36- 39 F4.1 arcsec DEs Declination (J2000) 41- 64 A24 --- Host Host galaxy name 66- 70 F5.3 mag E(B-V)g Galactic E(B-V) 72 A1 --- l_E(B-V)h Limit flag on E(B-V)h 73- 77 F5.3 mag E(B-V)h ?=- Host E(B-V) 79- 83 F5.3 mag e_E(B-V)h ? rms uncertainty on E(B-V)h 85- 89 F5.3 --- z Redshift 90 A1 --- --- [+] 91- 95 F5.3 --- E_z Error on z (upper value) 96 A1 --- --- [-] 97-101 F5.3 --- e_z Error on z (lower value) 103-107 A5 --- r_z Redhsidt reference(s) (1) 109-120 A12 --- FileName Name of the file with light curve data
Note (1): References as follows: a = Gall et al. (2016A&A...592A.129G) b = this study c = NASA/IPAC Extragalactic Database d = Gall et al. (2015A&A...582A...3G) e = Sloan Digital Sky Survey f = Lilly et al. (2007, Cat. J/ApJS/172/70)
Byte-by-byte Description of file: ps1*.dat sn2013ca.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Date Date 12- 19 F8.2 d MJD Modified Julian Day 21- 27 F7.2 d Epoch Rest frame epoch (1) 29- 33 F5.2 mag mag Magnitude (2) 37- 40 F4.2 mag e_mag rms uncertainty on mag 42- 46 A5 --- Filt Filter 48- 50 A3 --- Tel Telescope (3)
Note (1): Epochs are in rest frame with respect to the first detection. SN2013ca : z=0.045 assumed, date of first detection on 56392.0 (MJD) in gp (g'), rp (r') and ip (i') PS1-13wr : z=0.076 assumed, date of first detection on 56349.60 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 PS1-14vk : z=0.080 assumed, date of first detection on 56740.51 (MJD) in gp (g'), rp (r') and ip (i') PS1-12bku : z=0.088 assumed, date of discovery on 56161.36 (MJD) in gp (g'), rp (r') and ip (i'), g_PS1, r_PS1, i_PS1, z_PS1, y_PS1 PS1-13abg : z=0.123 assumed, date of first detection on 56380.37 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 PS1-13baf : z=0.144 assumed, date of first detection on 56409.49 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 PS1-13bmf : z=0.163 assumed, date of first detection on 56420.36 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 PS1-13atm : z=0.220 assumed, date of first detection on 56396.37 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 PS1-13bni : z=0.335 assumed, date of discovery on 56409.49 (MJD) in y_PS1, g_PS1, r_PS1, i_PS1, z_PS1 Note (2): The tabulated magnitudes are given "as observed", i.e. neither corrected for dust extinction nor K-corrected. Note (3): Telescopes as follows: PS1 = Panoramic Survey Telescope & Rapid Response System 1. LT = Liverpool Telescope. NOT = Nordic Optical Telescope
Acknowledgements: Elisabeth Gall, egall01(at)
(End) Elisabeth Gall [QUB, UK], Patricia Vannier [CDS] 26-Oct-2017
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