J/ApJ/964/172 HST photometry of SNe in nearby galaxies (Baer-Way+, 2024) ================================================================================ A snapshot survey of nearby supernovae with the Hubble Space Telescope. Baer-Way R., DeGraw A., Zheng W., Van Dyk S.D., Filippenko A.V., Fox O.D., Brink T.G., Kelly P.L., Smith N., Vasylyev S.S., de Jaeger T., Zhang K., Stegman S., Ross T., Yunus S. =2024ApJ...964..172B ================================================================================ ADC_Keywords: Supernovae; Photometry, HST; Photometry, UBVRI Keywords: Supernovae Abstract: Over recent decades, robotic (or highly automated) searches for supernovae (SNe) have discovered several thousand events, many of them in quite nearby galaxies (distances <30Mpc). Most of these SNe, including some of the best-studied events to date, were found before maximum brightness and have associated with them extensive follow-up photometry and spectroscopy. Some of these discoveries are so-called "SN impostors," thought to be superoutbursts of luminous blue variable stars, although possibly a new, weak class of massive-star explosions. We conducted a Snapshot program with the Hubble Space Telescope (HST) and obtained images of the sites of 31 SNe and four impostors, to acquire late-time photometry through two filters. The primary aim of this project was to reveal the origin of any lingering energy for each event, whether it is the result of radioactive decay or, in some cases, ongoing late-time interaction of the SN shock with preexisting circumstellar matter, or the presence of a light echo. Alternatively, lingering faint light at the SN position may arise from an underlying stellar population (e.g., a host star cluster, companion star, or a chance alignment). The results from this study complement and extend those from Snapshot programs by various investigators in previous HST cycles. Description: In this paper, we present the results of HST Snapshot program GO-16179 (PI: A. Filippenko), along with some data from previous Snapshot programs such as GO-14668 and GO-15166 (PI: A. Filippenko). The program was executed during HST Cycle 28 from 2020 November 11 through 2021 September 24, with the Wide Field Camera 3 (WFC3) UVIS. The original observing request was for 55 visits, consisting of nine SNe Ia, 27 Type Ib/c SNe (SNe Ib/c), 12 SNe II, and seven SN impostors, of which 38 visits (~70%) were actually executed. All of the data presented in this article were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI). The specific observations analyzed can be accessed via doi:10.17909/qz85-k192 File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 108 35 Properties of the targeted events and their hosts table2.dat 90 35 HST photometry of the observed supernovae table4.dat 85 322 Photometry of seven supernovae with unpublished data -------------------------------------------------------------------------------- See also: B/sn : Asiago Supernova Catalogue (Barbon et al., 1999-) B/hst : HST Archived Exposures Catalog (STScI, 2007) J/MNRAS/408/181 : CN2002ch UBVRI and ugriz light curves (Pastorello+, 2010) J/ApJ/742/L18 : Follow-up photometry of SNIIb PTF 11eon (Arcavi+, 2011) J/AJ/144/131 : Photometry and spectroscopy of SN 2010jl (Zhang+, 2012) J/MNRAS/433/1871 : UBVRI griz light curves of SN 2012aw (Bose+, 2013) J/other/Nat/494.65 : SN 2010mc outburst before explosion (Ofek+, 2013) J/A+A/562/A17 : SN 2011dh - The first 100 days (Ergon+, 2014) J/ApJ/781/42 : Optical photometry of SN 2010jl (Ofek+, 2014) J/ApJS/215/9 : PHAT X. UV-IR photometry of M31 stars (Williams+, 2014) J/A+A/580/A142 : SN 2011dh. The first two years (Ergon+, 2015) J/ApJ/861/63 : Type IIP SN 2016bkv LCs and spectra (Hosseinzadeh+, 2018) J/MNRAS/487/832 : BVRI photometry of the Type II-P SN 2017eaw (Buta+, 2019) J/ApJS/241/38 : A comprehensive analysis of Spitzer SNe (Szalai+, 2019) J/ApJ/883/147 : LCs of the H-stripped SN2016coi (Terreran+, 2019) J/ApJ/875/136 : BVRI, sp. & IR obs. of SN2017eaw (Van Dyk+, 2019) J/ApJ/894/111 : Gemini/GMOS-S sp. of the type IIn SN 2010jl (Bevan+, 2020) J/ApJ/895/31 : Photometric obs. of Type II SN 2018ivc (Bostroem+, 2020) J/ApJ/898/166 : UV to NIR obs. of SN 2019ehk (Jacobson-Galan+, 2020) J/ApJ/900/11 : Sp. of SN 2017eaw after explosion (Weil+, 2020) J/A+A/655/A105 : 3 SN multiwavelength light curves (Sollerman+, 2021) J/ApJ/910/42 : LCs and spectroscopic obs. of AT2018cow (Xiang+, 2021) J/ApJ/939/105 : X-ray SN2014C obs. (Brethauer+, 2022) J/ApJ/924/55 : UV and optical obs. of type Ic SN 2020oi (Gagliano+, 2022) J/ApJ/930/34 : HCT sp. obs. of the type IIP SN 2020jfo (Teja+, 2022) J/ApJ/954/155 : Type IIP supernova SN 2018gj follow-up obs. (Teja+, 2023) http://www.wis-tns.org/ : Transient Name Server (TNS) home page http://mast.stsci.edu/search/ui/#/hst : HST data on MAST Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- SN Supernova identifier (SNYYYYaaa or ATYYYYaaa) 11- 20 A10 --- Type SN type 22- 23 I2 h RAh TNS Hour of Right Ascension (J2000) 25- 26 I2 min RAm TNS Minute of Right Ascension (J2000) 28- 32 F5.2 s RAs TNS Second of Right Ascension (J2000) 34- 34 A1 --- DE- TNS Sign of the Declination (J2000) 35- 36 I2 deg DEd TNS Degree of Declination (J2000) 38- 39 I2 arcmin DEm TNS Arcminute of Declination (J2000) 41- 45 F5.2 arcsec DEs TNS Arcsecond of Declination (J2000) 47- 56 A10 "Y/M/D" Disc TNS discovery date (UT) 58- 84 A27 --- Host Host galaxy identifier 86- 89 F4.2 mag Av [0.04/1.02] Milky Way V band extinction from NED 91- 94 F4.1 Mpc Dist [3.6/70.7]? Distance from NED 96- 99 F4.1 Mpc e_Dist [0.2/11]? Uncertainty in Dist 101-105 I5 km/s vHel [-39/10493]? Host heliocentric velocity from NED 107-108 I2 km/s e_vHel [1/49]? Uncertainty in vHel -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- SN Supernova identifier (SNYYYYaaa or ATYYYYaaa) 11- 20 A10 "Y/M/D" Date UTC observation date 22- 28 F7.1 d MJD [59164.8/59481.3] Modified Julian Date of observation 30- 36 F7.1 d Age [291.9/11757.8] Days since discovery 38- 42 A5 --- Band1 First photometric band used 44- 48 A5 --- Band2 Second photometric band used 50- 52 I3 s Exp1 [710/780] Exposure time in Band1 54- 56 I3 s Exp2 [710/780] Exposure time in Band2 58- 58 A1 --- l_mag1 Limit flag on mag1 60- 64 F5.2 mag mag1 [19.5/27.4] Apparent Vega magnitude in Band1 66- 69 F4.2 mag e_mag1 [0/0.1]? Uncertainty in mag1 71- 71 A1 --- l_mag2 Limit flag on mag2 73- 77 F5.2 mag mag2 [18.54/27.2] Apparent Vega magnitude in Band2 79- 82 F4.2 mag e_mag2 [0/0.13]? Uncertainty in mag2 84- 87 A4 --- Decl? Exponential decline? 89-90 A2 --- f_SN lc: Photometry available in Table 4; column added by CDS -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 9 A9 --- SN Supernova identifier (SNYYYYaaa) 11- 20 F10.4 d MJD [57470.3/59138.12] Modified Julian Date 22- 27 F6.3 mag Bmag [14.6/21.72]? Apparent B filter Vega magnitude 29- 33 F5.3 mag e_Bmag [0.01/1.1]? Uncertainty in Bmag 35- 40 F6.3 mag Vmag [14.75/20.79]? Apparent V filter Vega magnitude 42- 46 F5.3 mag e_Vmag [0.008/1.3]? Uncertainty in Vmag 48- 53 F6.3 mag Rmag [14.51/20.13]? Apparent R filter Vega magnitude 55- 59 F5.3 mag e_Rmag [0.009/0.9]? Uncertainty in Rmag 61- 66 F6.3 mag Cmag [14.43/20.09]? Apparent clear filter Vega magnitude 68- 72 F5.3 mag e_Cmag [0.009/1.3]? Uncertainty in Cmag 74- 79 F6.3 mag Imag [14.2/19.5]? Apparent I filter Vega magnitude 81- 85 F5.3 mag e_Imag [0.013/1.2]? Uncertainty in Imag -------------------------------------------------------------------------------- History: From electronic version of the journal License: CC-BY-4.0 ================================================================================ (End) Prepared by [AAS], Emmanuelle Perret [CDS] 27-Jul-2026