RA/DEC (2000)
22:54:43.666 +07:51:43.39
343.681942406 +7.86205224099
Type
SN IIn
Redshift
0.023586
Related AstroNotes: 2025-155, 2025-162
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-05-24 08:57:32.256
TNS AT
Y
Public
Y
Discovery Mag
18.76
Filter
cyan-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), 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)

Spectra

 SN_2025lwz - 2025-05-30 09:38:22 ESO-NTT / EFOSC2-NTT (ePESSTO+)z=
 SN_2025lwz - 2025-05-29 13:04:10 FTN / FLOYDS-N (Global SN Project)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

 GOTO-N_GOTO-2_L
 PS2_GPC2_w
 ATLAS-CHL_ATLAS-04_orange
 ATLAS-CHL_ATLAS-04_cyan
 GOTO-N_GOTO-1_L
 P48_ZTF-Cam_r
   
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
21194 2025-05-30 09:38:22 ESO-NTT / EFOSC2-NTT 1800 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Yu-Hsing Lee, Cheng-Han Lai, Ting-Wan Chen ePESSTO+ tns_2025lwz_2025-05-30_09-38-22_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025lwz_2025-05-30_09-38-22_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object
21195 2025-05-29 13:04:10 FTN / FLOYDS-N 3600 LCO Yuan Qi Ni Global SN Project tns_2025lwz_2025-05-29_13-04-10_FTN_FLOYDS-N_Global_SN_Project.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-05-19 05:11:49 - 2025-05-19 05:11:49 2460814.716539 - 2460814.716539 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491832 2025-05-19 05:11:49 2460814.716539 18.76 0.18 ABMag L-GOTO GOTO-N_GOTO-2 180
w-P1 PS2_GPC2 2025-05-27 13:27:25 - 2025-05-27 13:27:25 2460823.06071 - 2460823.06071 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
494578 2025-05-27 13:27:25 2460823.06071 18.85 0.03 22 ABMag w-P1 PS2_GPC2 45 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-05-20 09:29:40 - 2025-05-20 09:29:40 2460815.8956 - 2460815.8956 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491171 2025-05-20 09:29:40 2460815.8956 17.4 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
cyan-ATLAS ATLAS-CHL_ATLAS-04 2025-05-24 08:57:32 - 2025-05-24 08:57:32 2460819.87329 - 2460819.87329 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491172 2025-05-24 08:57:32 2460819.87329 18.76 0.15 19.06 ABMag cyan-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
L-GOTO GOTO-N_GOTO-1 2025-05-15 04:46:35 - 2025-05-15 04:46:35 2460810.699022 - 2460810.699022 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491831 2025-05-15 04:46:35 2460810.699022 18.9 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-05-12 11:29:20 - 2025-05-25 11:04:03 2460807.9787037 - 2460820.9611458 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
491519 2025-05-25 11:04:03 2460820.9611458 18.9259 0.124346 19.9319 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
491518 2025-05-12 11:29:20 2460807.9787037 18.23 ABMag r-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
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
258195 2025-06-12 11:23:37 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 22:54:43.666 +07:51:43.39 2025-05-27 13:27:25.344 18.85 w-P1 PSN PS25dgc Pan-STARRS N
256894 2025-05-27 08:47:20 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 22:54:43.662 +07:51:43.39 2025-05-19 05:11:49.056 18.76 L-GOTO Other GOTO25ddi GOTO N
256724 2025-05-25 19:47:01 ALeRCE S. Jurado,F.E. Bauer,F. Forster et al. ALeRCE ZTF 22:54:43.675 +07:51:43.23 2025-05-25 11:04:02.997 18.9259 r-ZTF PSN SDSS J225443.46+075149.9 ZTF25aaqqfkv ZTF Early SN candidate (r-rise > 0.06+-0.01 mag/day) classified using ALeRCE's stamp classifier (Carrasco-Davis et al. 2021) and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF25aaqqfkv N
256562 2025-05-25 05:44:34 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 22:54:43.697 +07:51:43.05 2025-05-24 08:57:32.256 18.76 cyan-ATLAS PSN ATLAS25fjc ATLAS 2025TNSTR1950....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
21195 2025-05-30 18:15:07 Yuan Qi Ni Chris Ni (KITP/LCO), Moira Andrews, Joseph Farah, Kathryn Wynn, D. Andrew Howell, Curtis McCully Global SN Project SN IIn 0.023586 1 Global SN Project We report the classification of SN 2025lwz as SN IIn. The spectrum shows a best match to IIn SN 1998S from SNID (Blondin & Tonry 2007, ApJ, 666, 1024). The object redshift is acquired from the nearby host of WISEA J225443.49+075149.9 (z=0.023586, value from NED). Additional follow-up is encouraged. 2025TNSCR2041....1N
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
21195 2025-05-29 13:04:10 FTN / FLOYDS-N 3600 LCO Yuan Qi Ni Global SN Project tns_2025lwz_2025-05-29_13-04-10_FTN_FLOYDS-N_Global_SN_Project.txt Object
21194 2025-05-30 18:09:09 ePESSTOplus_Bot1 Stefano Pio Cosentino, Callum Francis Aster, Amar Aryan, Yu-Hsing Lee, Cheng-Han Lai, Ting-Wan Chen, Ofer Yaron on behalf of ePESSTO+ ePESSTO+ SN II 0.024 1 ePESSTO+ 2025TNSCR2039....1C
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
21194 2025-05-30 09:38:22 ESO-NTT / EFOSC2-NTT 1800 Stefano Pio Cosentino, Callum Francis Aster Amar Aryan, Yu-Hsing Lee, Cheng-Han Lai, Ting-Wan Chen ePESSTO+ tns_2025lwz_2025-05-30_09-38-22_ESO-NTT_EFOSC2-NTT_ePESSTO+.asci tns_2025lwz_2025-05-30_09-38-22_ESO-NTT_EFOSC2-NTT_ePESSTO+.fits Object

Comments

Matt
Nicholl

QUB Girls in Maths and Physics

Identified in Pan-STARRS data by Eva, Pippa Ashe, and Kaitlin as part of the QUB Girls in Maths and Physics event.

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 258195 of Group Pan-STARRS
Previous RA, DEC: 22:54:43.675, +07:51:43.23 (343.681981, +7.8620077)
Updated RA, DEC: 22:54:43.666, +07:51:43.39 (343.681942406, +7.86205224099)

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 256724 of Group ZTF
Previous RA, DEC: 22:54:43.697, +07:51:43.05 (343.6820725, +7.8619575)
Updated RA, DEC: 22:54:43.675, +07:51:43.23 (343.681981, +7.8620077)