RA/DEC (2000)
23:51:46.954 -01:22:07.63
357.945642452 -1.36878491394
Type
SN IIn
Redshift
0.0379
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-09-13 02:58:31.008
TNS AT
Y
Public
Y
Discovery Mag
18.86
Filter
L-GOTO
Reporter/s
D. O'Neill, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025xhp - 2025-09-28 22:12:04 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

 ▌PS2_GPC2_w
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌GOTO-N_GOTO-1_L
 ▌P48_ZTF-Cam_r
 ▌P48_ZTF-Cam_g
   
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
22110 2025-09-28 22:12:04 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath Jacob Wise ZTF tns_2025xhp_2025-09-28_22-12-04.079_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
w-P1 PS2_GPC2 2025-09-16 08:59:36 - 2025-09-16 08:59:36 2460934.87472 - 2460934.87472 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
518935 2025-09-16 08:59:36 2460934.87472 18.4 0.03 22 ABMag w-P1 PS2_GPC2 45 Robot
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-09-27 05:48:03 - 2025-09-28 03:12:44 2460945.7417 - 2460946.63384 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
520691 2025-09-28 03:12:44 2460946.63384 17.899 0.105 19.02 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
520690 2025-09-27 05:48:03 2460945.7417 18.97 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-09-11 02:48:18 - 2025-09-13 02:58:31 2460929.616885 - 2460931.623968 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516645 2025-09-13 02:58:31 2460931.623968 18.86 0.13 ABMag L-GOTO GOTO-N_GOTO-1 180
516644 2025-09-11 02:48:18 2460929.616885 18.8 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-08-29 09:37:06 - 2025-08-29 09:37:06 2460916.9007639 - 2460916.9007639 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516845 2025-08-29 09:37:06 2460916.9007639 20.8208 0.18933 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-08-29 08:03:00 - 2025-09-14 07:35:23 2460916.8354167 - 2460932.8162384 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
516846 2025-09-14 07:35:23 2460932.8162384 18.6378 0.074008 ABMag g-ZTF P48_ZTF-Cam
516844 2025-08-29 08:03:00 2460916.8354167 20.9565 ABMag g-ZTF P48_ZTF-Cam [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
271665 2025-09-29 09:38:32 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 23:51:46.980 -01:22:07.56 2025-09-28 03:12:43.776 17.899 orange-ATLAS PSN ATLAS25mca ATLAS N
270859 2025-09-21 14:47:40 PS1_Bot1 K. C. Chambers,T. de Boer,J. Fairlamb et al. Pan-STARRS Pan-STARRS 23:51:46.954 -01:22:07.63 2025-09-16 08:59:35.808 18.4 w-P1 PSN PS25hoq Pan-STARRS N
269901 2025-09-14 09:18:42 Fritz Jesper Sollerman (SU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 23:51:46.963 -01:22:07.66 2025-08-29 09:37:06.000 20.8208 r-ZTF PSN ZTF25abpzwne ZTF N
269816 2025-09-13 07:53:41 GOTO_bot D. O'Neill,K. Ackley,M. Dyer et al. GOTO GOTO 23:51:46.991 -01:22:07.60 2025-09-13 02:58:31.008 18.86 L-GOTO Other GOTO25gyi GOTO 2025TNSTR3674....1O N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22110 2025-09-28 23:13:17 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (Caltech), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU) ZTF SN IIn 0.0379 1 ZTF Spectrum displays H-alpha and H-beta emission with an absense of [O III] superimposed on a blue continuum, cosistent with a SN IIn classification. Host redshift of z = 0.037900 ± 0.000150 from The 6dF Galaxy Survey Data Release 3. We note that the transient appears to display precursor activity at m ~ 21 between MJD 60901 and MJD 60919 in ZTF forced photometry. 2025TNSCR3900....1W
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
22110 2025-09-28 22:12:04 LT / SPRAT Jacob Wise, Daniel Perley, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath Jacob Wise ZTF tns_2025xhp_2025-09-28_22-12-04.079_LT_SPRAT_ZTF.spec Object

Comments

TNS
System

Sun, 09/21/2025 - 14:47

Object coordinates updated

Object coordinates updated according to AT-report 270859 of Group Pan-STARRS
Previous RA, DEC: 23:51:46.963, -01:22:07.66 (357.9456799, -1.3687946)
Updated RA, DEC: 23:51:46.954, -01:22:07.63 (357.945642452, -1.36878491394)

TNS
System

Sun, 09/14/2025 - 09:18

Object coordinates updated

Object coordinates updated according to AT-report 269901 of Group ZTF
Previous RA, DEC: 23:51:46.991, -01:22:07.60 (357.945794, -1.368777)
Updated RA, DEC: 23:51:46.963, -01:22:07.66 (357.9456799, -1.3687946)