DRAFT
2020-04-17 22:08:47
Type: Object/s-Discovery/Classification
Bibcode: 2020TNSAN..85....1I
Spectroscopic classification of the intrinsically faint optical transient AT 2020hdh as Type Ic supernova
Authors: Andreoni Igor (Caltech), Kishalay De (Caltech), Anastasios Tzanidakis (Caltech), Mansi M. Kasliwal (Caltech)
Source Group: ZTF
Keywords: Supernova, Transient
Abstract:
We observed with P60/SEDM the intrinsically faint optical transient AT2020hdh, discovered during the the "Pan-STARRS Search for Kilonovae" and also found as part of the "Census of the Local Universe" experiment with ZTF. The spectrum of AT2020hdh is consistent with a Type Ic supernova at redshift z=0.012.
The intrinsically faint transient AT2020hdh was discovered on 2020-04-12 using Pan-STARRS1 as part of the "Pan-STARRS Search for Kilonovae" (Smartt et al. AstroNote 20-83; Smartt et al. AstroNote 2019-48). The transient was also identified with the Zwicky Transient Facility (ZTF; Bellm et al. 2019, Graham et al. 2019) and saved as part of the "Census of the Local Universe" experiment (De et al. Astronote 2019-124, De et al. ATel 13546).

 

We observed AT2020hdh with the Spectral Energy Distribution Machine (SEDM; Blagorodnova et al. 2018) mounted on Palomar 60-inch telescope (P60; Cenko et al. 2006) on 2020-04-16. The spectrum shows deep O I and Ca II features at z=0.012 that suggest the transient to be a Type Ic supernova (SN Ic). H-alpha and H-beta lines are also detected, but they are consistent with being narrow lines from the star-forming host galaxy at the resolution of P60/SEDM. We found a good match to the SN Ic 2004aw at the host redshift running SNID (Blondin & Tonry 2007) on the spectrum after clipping galaxy lines.
Show current TNS values
Catalog Name Reported RA Reported DEC Reported Obj-Type Reported Redshift Host Name Host Redshift Remarks TNS RA TNS DEC TNS Obj-Type TNS Redshift
TNS 2020hdh 14:32:38.475 +31:40:15.64 SN Ic 0.012 14:32:38.466 +31:40:15.57 SN Ic 0.012
AstroNote Publication Timestamp Title Authors
2020-83 2020-04-15 09:10:35 Pan-STARRS Search for Kilonovae: discovery of an intrinsically faint transient in NGC 5672 (57 Mpc) S. J. Smartt, K. W. Smith, M. Fulton (QUB), K. C. Chambers, M. Huber (IfA, Hawaii), S. Srivastav, O. McBrien, D. R. Young, J. Gillanders, D. O'Neill, P. Clark, S. Sim (QUB), T. de Boer, J. Bulger, J. Fairlamb, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA), T.-W. Chen (Stockholm), D. E. Wright (University of Minnesota), C. Stubbs (Harvard), A. Rest (STScI)
2019-48 2019-07-20 17:37:13 Pan-STARRS Search for Kilonovae : discovery of an intrinsically faint transient in UGC 12798 (68 Mpc) S. J. Smartt, (Queen's University Belfast), K. C. Chambers, (IfA, University of Hawaii) K. W. Smith (QUB), M. Huber (IfA), S. Srivastav, O. McBrien, D. R. Young, J. Gillanders, D. O'Neil, P. Clark, S. Sim, (QUB), T. de Boer, J. Bulger, J. Fairlamb, C.-C. Lin, T. Lowe, E. Magnier, A. Schultz, R. J. Wainscoat, M. Willman (IfA), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), C. Stubbs (Harvard), A. Rest (STScI)
2019-124 2019-11-05 20:41:27 Public reports of transients from the Zwicky Transient Facility volume limited experiment K. De (Caltech), A. Tzanidakis (Caltech), M. M. Kasliwal (Caltech), C. Fremling (Caltech), S. R. Kulkarni (Caltech) report on behalf of a larger collaboration

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