DRAFT
2023-10-25 13:40:38
Type: Object/s-Discovery/Classification
Bibcode: 2023TNSAN.278....1P
Classification of AT2023ufx as a likely SN II at z~0.01
Authors: M. Pursiainen (Warwick), S. Srivastav, S. J. Smartt (Oxford/QUB), C.R. Angus, M. Fulton, M. Nicholl, K. W. Smith, D. R. Young, T. Moore, X. Sheng, A. Aamer (QUB), P. Ramsden (QUB/Birmingham), J. Gillanders, H. Stevance, S. Ramaiya (Oxford), M. Huber (IfA, Hawaii)
Keywords: Supernova, Spectroscopy
Abstract:
We report the classification of the transient AT2023ufx as a likely type II supernova at z~0.01

We report the classification of the optical transient ATLAS23tsa/ZTF23abjjqxf/AT2023ufx as a likely type II supernova at z~0.01. 

We obtained a low-resolution spectrum of AT2023ufx on 2023-10-19 using the Alhambra Faint Object Spectrograph and Camera (ALFOSC) on the Nordic Optical Telescope at the Spanish Observatorio del Roque de los Muchachos, Spain. The observation was performed using the Gr4 grism (3800-8000A) and a 1” slit. 

The spectrum shows broad H in absorption and emission, and weaker He I absorption. Template comparisons using SNID (Blondin & Tonry 2007 2007ApJ…666.1024B) and superfit (Howell et al. 2005 2005ApJ…634.1190H) find matches to type II supernovae at z~0.01. 

We note that we are unable to firmly constrain the redshift and sub-type of 2023ufx at this epoch; we find plausible matches to type IIL, IIP, IIb and 1987A-like subtypes within the range 0.01<z<0.032 (see attached). We thus encourage further follow-up observations of this event. 
 

 

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 2023ufx 08:24:51.568 +21:17:43.15 SN II 0.01 Broad H absorption and emission features, and some weaker He I absorption 08:24:51.568 +21:17:43.15 SN II 0.01
AstroNote Publication Timestamp Title Authors
2023-268 2023-10-12 15:59:11 ATLAS discovery of the candidate fast blue optical transient AT2023ufx S. Srivastav, S. J. Smartt (Oxford/QUB), K. W. Smith, D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. Angus, A. Aamer (QUB), P. Ramsden (QUB/Birmingham), L. Shingles (GSI/QUB), J. Gillanders, L. Rhodes, H. Stevance (Oxford), L. Denneau, J. Tonry, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. Sommer (LMU/QUB)
2023-269 2023-10-12 17:32:41 Early Spectrum of the FBOT Candidate 2023ufx from SCAT M. A. Tucker (CCAPP/OSU) on behalf of the SCAT team
File Comments
SN2023ufx_SNID_comparisons.png SNID template comparisons to 2023ufx. We find plausible matches to the following subtypes and reshifts; IIL -- z~0.011; IIP -- z~0.015; IIb -- z~0.024; 1987A-like -- z~0.032

Comments