The ASAS-SN bright supernova catalogue – V. 2018–2020

Neumann, Kyle; Holoien, T. W. S.; Kochanek, C. S.; Stanek, K. Z.; Vallely, P.; Shappee, B. J.; Prieto, J. L.; Pessi, Thallis; Jayasinghe, T.; Brimacombe, J.; Bersier, D.; Aydi, E.; Basinger, C.; Beacom, J. F.; Bose, S.; Brown, J. S.; Chen, P; Clocchiatti, A.; Desai, D.; Dong, Subo; Falco, E.; Holmbo, S.; Morrell, N.; Shields, J.; Sokolovsky, K. V.; Strader, Jay; Stritzinger, M.; Swihart, Samuel J.; Thompson, Todd A.; Way, Z.; Aslan, Leon; Bishop, D. W.; Bock, G.; Bradshaw, J.; Cacella, P.; Castro-Morales, Nicolas; Conseil, E.; Cornect, R.; Cruz, I.; Farfán, R. G.; Fernández, J. M.; Gabuya, A; Gonzalez-Carballo, J-L; Kendurkar, M.; Kiyota, S.; Koff, R. A.; Krannich, G.; Marples, P.; Monard, L. A. G.; noz, J A Mu; Nicholls, B.; Post, R. S.; Pujic, Z; Stone, G.; Tomasella, L.; Trappett, D.; Wiethoff, W.

doi:10.1093/mnras/stad355

Cited by 10 publications

(13 citation statements)

References 62 publications

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“…We plot this spectrum in Figure 3, along with its SNID template match to the Type Ic-BL SN 1997ef. We note that this SN was also reported in the recently released ASAS-SN bright SN catalog (Neumann et al 2023).…”

Section: Discussionsupporting

confidence: 74%

“…Its P48 light curves and the spectrum used for classification are shown in Figures 1 and 3, respectively. We note that this SN was also reported in the recently released ASAS-SN bright SN catalog (Neumann et al 2023).…”

Section: A5 Sn 2019hsxsupporting

confidence: 74%

“…We note that the Asteroid Terrestrialimpact Last Alert System (ATLAS; Tonry et al 2018d) has contributed to several of the SN detections considered here (see the Appendix). Three of the SNe Ic-BL in our sample were also reported in the recently released bright SN catalog by the All-Sky Automated Survey for Supernovae (ASAS-SN; Neumann et al 2023).…”

Section: Multiwavelength Observationsmentioning

confidence: 99%

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A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae

Corsi,

Ho,

Cenko

et al. 2023

ApJ

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The dividing line between gamma-ray bursts (GRBs) and ordinary stripped-envelope core-collapse supernovae (SNe) is yet to be fully understood. Observationally mapping the variety of ejecta outcomes (ultrarelativistic, mildly relativistic, or nonrelativistic) in SNe of Type Ic with broad lines (Ic-BL) can provide a key test to stellar explosion models. However, this requires large samples of the rare SN Ic-BL events with follow-up observations in the radio, where fast ejecta can be probed largely free of geometry and viewing angle effects. Here, we present the results of a radio (and X-ray) follow-up campaign of 16 SNe Ic-BL detected by the Zwicky Transient Facility (ZTF). Our radio campaign resulted in four counterpart detections and 12 deep upper limits. None of the events in our sample is as relativistic as SN 1998bw and we constrain the fraction of SN 1998bw-like explosions to <19% (3σ Gaussian equivalent), a factor of ≈2 smaller than previously established. We exclude relativistic ejecta with radio luminosity densities in between ≈5 × 1027 erg s−1 Hz−1 and ≈1029 erg s−1 Hz−1 at t ≳ 20 days since explosion for ≈60% of the events in our sample. This shows that SNe Ic-BL similar to the GRB-associated SNe 1998bw, 2003lw, and 2010bh, or to the relativistic SNe 2009bb and iPTF17cw, are rare. Our results also exclude an association of the SNe Ic-BL in our sample with largely off-axis GRBs with energies E ≳ 1050 erg. The parameter space of SN 2006aj-like events (faint and fast-peaking radio emission) is, on the other hand, left largely unconstrained, and systematically exploring it represents a promising line of future research.

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Section: Discussionsupporting

confidence: 74%

Section: A5 Sn 2019hsxsupporting

confidence: 74%

Section: Multiwavelength Observationsmentioning

confidence: 99%

See 1 more Smart Citation

A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae

Corsi,

Ho,

Cenko

et al. 2023

ApJ

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“…When comparing to ASAS-SN discoveries alone ( -2017( , Holoien et al 2019, YSE discoveries have a smaller median angular separation (1 4 versus 4 5), but have a slightly larger median physical offset (3.87 versus 2.4 kpc). This holds true for the newest release of ASAS-SN discoveries ( , Neumann et al 2023, which have median offsets of 3 9 and 2 5 kpc. This is likely due to the YSE's greater depth and smaller pixel scale.…”

Section: Sn Offsetmentioning

confidence: 70%

“…We note that, in the updated 2018-2020 ASAS-SN sample fromNeumann et al (2023), the survey changed their limiting threshold to g 18 mag, and subsequently have a higher spectroscopic completeness measure of 90% complete for m peak 17.0 mag.…”

mentioning

confidence: 94%

The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae

Aleo

Malanchev

Sharief

et al. 2023

ApJS

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We present the Young Supernova Experiment Data Release 1 (YSE DR1), comprised of processed multicolor PanSTARRS1 griz and Zwicky Transient Facility (ZTF) gr photometry of 1975 transients with host–galaxy associations, redshifts, spectroscopic and/or photometric classifications, and additional data products from 2019 November 24 to 2021 December 20. YSE DR1 spans discoveries and observations from young and fast-rising supernovae (SNe) to transients that persist for over a year, with a redshift distribution reaching z ≈ 0.5. We present relative SN rates from YSE’s magnitude- and volume-limited surveys, which are consistent with previously published values within estimated uncertainties for untargeted surveys. We combine YSE and ZTF data, and create multisurvey SN simulations to train the ParSNIP and SuperRAENN photometric classification algorithms; when validating our ParSNIP classifier on 472 spectroscopically classified YSE DR1 SNe, we achieve 82% accuracy across three SN classes (SNe Ia, II, Ib/Ic) and 90% accuracy across two SN classes (SNe Ia, core-collapse SNe). Our classifier performs particularly well on SNe Ia, with high (>90%) individual completeness and purity, which will help build an anchor photometric SNe Ia sample for cosmology. We then use our photometric classifier to characterize our photometric sample of 1483 SNe, labeling 1048 (∼71%) SNe Ia, 339 (∼23%) SNe II, and 96 (∼6%) SNe Ib/Ic. YSE DR1 provides a training ground for building discovery, anomaly detection, and classification algorithms, performing cosmological analyses, understanding the nature of red and rare transients, exploring tidal disruption events and nuclear variability, and preparing for the forthcoming Vera C. Rubin Observatory Legacy Survey of Space and Time.

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A characterization of ASAS-SN core-collapse supernova environments with VLT+MUSE

Pessi¹,

Prieto²,

Anderson³

et al. 2023

A&A

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Context. The analysis of core-collapse supernova (CCSN) environments can provide important information on the life cycle of massive stars and constrain the progenitor properties of these powerful explosions. The MUSE instrument at the Very Large Telescope (VLT) enables detailed local environment constraints of the progenitors of large samples of CCSNe. Using a homogeneous SN sample from the All-Sky Automated Survey for Supernovae (ASAS-SN) survey, an untargeted and spectroscopically complete transient survey, has enabled us to perform a minimally biased statistical analysis of CCSN environments. Aims. We analyze 111 galaxies observed by MUSE that hosted 112 CCSNe – 78 II, nine IIn, seven IIb, four Ic, seven Ib, three Ibn, two Ic-BL, one ambiguous Ibc, and one superluminous SN – detected or discovered by the ASAS-SN survey between 2014 and 2018. The majority of the galaxies were observed by the All-weather MUse Supernova Integral field Nearby Galaxies (AMUSING) survey. Here we analyze the immediate environment around the SN locations and compare the properties between the different CCSN types and their light curves. Methods. We used stellar population synthesis and spectral fitting techniques to derive physical parameters for all H II regions detected within each galaxy, including the star formation rate (SFR), Hα equivalent width (EW), oxygen abundance, and extinction. Results. We found that stripped-envelope supernovae (SESNe) occur in environments with a higher median SFR, Hα EW, and oxygen abundances than SNe II and SNe IIn/Ibn. Most of the distributions have no statistically significant differences, except between oxygen abundance distributions of SESNe and SNe II, and between Hα EW distributions of SESNe and SNe II. The distributions of SNe II and IIn are very similar, indicating that these events explode in similar environments. For the SESNe, SNe Ic have higher median SFRs, Hα EWs, and oxygen abundances than SNe Ib. SNe IIb have environments with similar SFRs and Hα EWs to SNe Ib, and similar oxygen abundances to SNe Ic. We also show that the postmaximum decline rate, s, of SNe II correlates with the Hα EW, and that the luminosity and the Δm15 parameter of SESNe correlate with the oxygen abundance, Hα EW, and SFR at their environments. This suggests a connection between the explosion mechanisms of these events to their environment properties.

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The ASAS-SN bright supernova catalogue – V. 2018–2020

Cited by 10 publications

References 62 publications

A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae

A Search for Relativistic Ejecta in a Sample of ZTF Broad-lined Type Ic Supernovae

The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae

A characterization of ASAS-SN core-collapse supernova environments with VLT+MUSE

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