RA/DEC (2000)
04:30:41.671 +02:56:42.89
67.6736273 +2.9452468
Type
SLSN-I
Redshift
0.2455
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2023-12-13 02:59:52.224
TNS AT
Y
Public
Y
Discovery Mag
19.753
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, A. Lawrence, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt (Oxford/QUB), K. W. Smith, D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, P. Ramsden (Queen's University Belfast), A. Aamer (QUB/Birmingham), L. Shingles (GSI/QUB), S. Srivastav, S. Ramaiya, J. Gillanders, L. Rhodes, A. Andersson, H. Stevance (Oxford), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. Sommer (LMU/QUB)

Spectra

 SN_2023aafk - 2024-02-10 19:54:55 NOT / ALFOSC (SGLF)z=
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Show Mg at z=vexp= km/s
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Show [Ca II] at z=vexp= km/s
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Show Tellurics 
Show Galaxy lines at z=
Show WR-WN at z=vexp= km/s
Show WR-WC/O at z=vexp= km/s
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),0 (observed)

Light curves

 ATLAS-CHL_ATLAS-04_orange
 P48_ZTF-Cam_r
 P48_ZTF-Cam_g
 ATLAS-MLO_ATLAS-01_orange
   
Pointer position (MJD, Mag, Abs.Mag): (0.00, 0.00, 0.00)
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
16676 2024-02-10 19:54:55 NOT / ALFOSC 2250 S. Geier and F. Poidevin F. Poidevin and I. Pérez-Fournon SGLF tns_2023aafk_2024-02-10_19-54-55_NOT_ALFOSC_SGLF.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
orange-ATLAS ATLAS-CHL_ATLAS-04 2023-12-13 02:59:52 - 2023-12-13 02:59:52 2460291.62491 - 2460291.62491 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
380506 2023-12-13 02:59:52 2460291.62491 19.753 0.127 20.15 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 110 Robot
r-ZTF P48_ZTF-Cam 2023-12-10 06:08:38 - 2023-12-29 04:40:48 2460288.756 - 2460307.695 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
382803 2023-12-29 04:40:48 2460307.695 19.57 ABMag r-ZTF P48_ZTF-Cam 30 ZTF
382802 2023-12-10 06:08:38 2460288.756 19.81 ABMag r-ZTF P48_ZTF-Cam 30 ZTF
g-ZTF P48_ZTF-Cam 2023-11-20 09:43:12 - 2023-11-20 09:43:12 2460268.905 - 2460268.905 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
382801 2023-11-20 09:43:12 2460268.905 19.78 ABMag g-ZTF P48_ZTF-Cam 30 ZTF [Last non detection]
orange-ATLAS ATLAS-MLO_ATLAS-01 2023-12-12 10:43:20 - 2023-12-12 10:43:20 2460290.94676 - 2460290.94676 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
380505 2023-12-12 10:43:20 2460290.94676 19.53 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
AT Reports
ID Time received (UT) Sender Reporter/s Reporting group Disc. Data Source RA DEC Discovery date (UT) Discovery Mag. Filter Related files AT Type Host name Internal name Assoc. Groups End prop. period Remarks ADS Bibcode Unreal Auto classification
198176 2023-12-29 09:35:06 ZTF_Bot1 C. Fremling (Caltech) on behalf of the Zwicky Transient Facility (ZTF) collaboration ZTF ZTF 04:30:41.671 +02:56:42.89 2023-12-10 06:08:38.400 19.81 r-ZTF PSN ZTF23absniid ZTF N
196612 2023-12-15 23:29:17 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 04:30:41.684 +02:56:43.12 2023-12-13 02:59:52.224 19.753 orange-ATLAS PSN ATLAS23xly ATLAS 2023TNSTR3253....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
16589 2024-02-16 18:05:57 Ismael Perez-Fournon F. Poidevin (IAC and ULL), S. Geier (GRANTECAN & IAC), I. Pérez-Fournon, C. M. Gutiérrez (IAC & ULL), Z. Delgado-González (ULL), C. Jiménez Angel (GRANTECAN), R. Könyves-Tóth (Konkoly Observatory, Univ. of Szeged), R. Marques-Chaves (Univ. of Geneva), C. M. B. Omand (The Oskar Klein Centre), and R. Shirley (MPE) on behalf of the SGLF SLSN group SGLF SLSN-I 0.2455 1 SGLF AT 2023aafk (ATLAS23xly, ZTF23absniid) was selected for spectroscopic classification with NOT ALFOSC (grism 4) as a SLSN candidate from the slowly evolving ZTF (and ATLAS forced photometry) light curve, the ALeRCE light curve classification, and the faint likely host galaxy. The classification and phase were determined using SNID (S. Blondin & J. L. Tonry 2007, ApJ, 666, 1024), with good matches to type-I SLSNe and SNe Ic-BL at z = 0.2455 and phase = 20 - 40 days. The reported redshift is from host galaxy emission lines.The light curve is nearly flat since 2024-12-10 (MJD = 60288), with low-amplitude undulations. The ZTF light curve is available at the ZTF/LSST brokers, e.g. Lasair, ALeRCE, ANTARES, and Fink: https://lasair-ztf.lsst.ac.uk/objects/ZTF23absniid/ https://alerce.online/object/ZTF23absniid https://antares.noirlab.edu/loci/ANT2023ta2ruwjmjj4r https://fink-portal.org/ZTF23absniid SN position on the DESI Legacy Survey imaging: https://www.legacysurvey.org/viewer?ra=67.6736273&dec=2.9452468&zoom=14&layer=ls-dr10&zoom=16&mark=67.6736273,2.9452468 2024TNSCR.480....1P
Spectra
ID Obs-date (UT) Tel / Inst Exp-Time Observer/s Reducer/s Group Spectrum ascii file Spectrum fits file Spec. Type Assoc. Groups End prop. period Remarks
16676 2024-02-10 19:54:55 NOT / ALFOSC 2250 S. Geier and F. Poidevin F. Poidevin and I. Pérez-Fournon SGLF tns_2023aafk_2024-02-10_19-54-55_NOT_ALFOSC_SGLF.txt Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 198176 of Group ZTF
Previous RA, DEC: 04:30:41.684, +02:56:43.12 (67.6736825, +2.94531)
Updated RA, DEC: 04:30:41.671, +02:56:42.89 (67.6736273, 2.9452468)