RA/DEC (2000)
20:07:19.931 +55:28:25.14
301.8330465 +55.4736498
Type
SLSN-I
Redshift
0.161
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-08-18 09:48:47.232
TNS AT
Y
Public
Y
Discovery Mag
19.805
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), M. R. Alarcón, J. Licandro, P. Nichita (IAC), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025upm - 2025-09-06 21:50:16 LT / SPRAT (ZTF)z=
▌Show H at z=vexp= km/s
▌Show He at z=vexp= km/s
▌Show He II at z=vexp= km/s
▌Show C II at z=vexp= km/s
▌Show C III at z=vexp= km/s
▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
▌Show N III at z=vexp= km/s
▌Show N IV at z=vexp= km/s
▌Show N V at z=vexp= km/s
▌Show O at z=vexp= km/s
▌Show [O I] at z=vexp= km/s
▌Show O II at z=vexp= km/s
▌Show [O II] at z=vexp= km/s
▌Show [O III] at z=vexp= km/s
▌Show O V at z=vexp= km/s
▌Show O VI at z=vexp= km/s
▌Show Na at z=vexp= km/s
▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
▌Show Si II at z=vexp= km/s
▌Show S II at z=vexp= km/s
▌Show Ca II at z=vexp= km/s
▌Show [Ca II] at z=vexp= km/s
▌Show Fe II at z=vexp= km/s
▌Show Fe III at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌Show Å at z=vexp= km/s
▌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-TDO_ATLAS-05_wide
 ▌GOTO-N_GOTO-2_L
 ▌P48_ZTF-Cam_r
 ▌ATLAS-HKO_ATLAS-02_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
21982 2025-09-06 21:50:16 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025upm_2025-09-06_21-50-16.415_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-08-16 01:27:01 - 2025-08-16 01:27:01 2460903.56043 - 2460903.56043 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
510468 2025-08-16 01:27:01 2460903.56043 19.3 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-2 2025-08-17 04:08:00 - 2025-08-24 22:04:13 2460904.672219 - 2460912.419592 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
512142 2025-08-24 22:04:13 2460912.419592 19.4 0.14 ABMag L-GOTO GOTO-N_GOTO-2 360
512141 2025-08-17 04:08:00 2460904.672219 18.5 ABMag L-GOTO GOTO-N_GOTO-2 360 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-08-11 05:20:59 - 2025-08-23 06:50:38 2460898.7229051 - 2460910.785162 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
511634 2025-08-23 06:50:38 2460910.785162 19.3969 0.0954356 ABMag r-ZTF P48_ZTF-Cam
511633 2025-08-14 04:35:17 2460901.691169 20.4 0.118252 ABMag r-ZTF P48_ZTF-Cam
511632 2025-08-11 05:20:59 2460898.7229051 19.9059 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-08-18 09:48:47 - 2025-08-18 09:48:47 2460905.90888 - 2460905.90888 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
510469 2025-08-18 09:48:47 2460905.90888 19.805 0.109 20.19 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 110 Robot
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
267576 2025-08-25 06:36:00 GOTO_bot D. O'Neill,G. Ramsay,K. Ackley et al. GOTO GOTO 20:07:19.993 +55:28:24.63 2025-08-24 22:04:12.576 19.4 L-GOTO Other GOTO25ghv GOTO N
267288 2025-08-23 11:06:44 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 20:07:19.931 +55:28:25.14 2025-08-14 04:35:17.001 20.4 r-ZTF PSN ZTF25abiwxmw ZTF N
266698 2025-08-20 10:55:09 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 20:07:19.954 +55:28:25.09 2025-08-18 09:48:47.232 19.805 orange-ATLAS PSN ATLAS25jvd ATLAS 2025TNSTR3286....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
21982 2025-09-07 12:44:09 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Zoe McGrath (LJMU) ZTF SLSN-I 0.161 1 1 ZTF Spectrum is well-fit to template spectra from pre-peak SLSN-I at a redshift of z = 0.161 ± 0.011. Further follow-up is encouraged to refine the transient's redshift. Classification performed using Next Generation Superfit (NGSF, Goldwasser et al. 2022). 2025TNSCR3609....1W
Related files
File Comments Last Modified (UT) Modified By
tns_2025upm_atrep_21982_ZTF.pdf NGSF fits 2025-09-07 12:44:10 Jacob Wise
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
21982 2025-09-06 21:50:16 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Zoe McGrath Jacob Wise ZTF tns_2025upm_2025-09-06_21-50-16.415_LT_SPRAT_ZTF.spec Object

Comments

TNS
System

Sat, 08/23/2025 - 11:06

Object coordinates updated

Object coordinates updated according to AT-report 267288 of Group ZTF
Previous RA, DEC: 20:07:19.954, +55:28:25.09 (301.83314, +55.4736375)
Updated RA, DEC: 20:07:19.931, +55:28:25.14 (301.8330465, +55.4736498)