RA/DEC (2000)
18:44:49.366 +58:04:13.71
281.205693 +58.0704745
Type
SN IIP
Redshift
0.026
Discovery ReportClassification Report
Related AstroNotes: 2025-305
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2025-10-11 05:13:40.002
TNS AT
Y
Public
Y
Host Name
GALEXASC J184449.82+580412.4
Discovery Mag
18.3361
Filter
g-ZTF
Reporter/s
F. Forster, F.E. Bauer, G. Pignata, A. Munoz-Arancibia, A. Mourao, L. Hernandez-Garcia, L. Galbany, J. Silva-Farfan, R. Dastidar, J.P. Brandt, A. Alvarez, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, B. Gamboa, P. Huijse, H. Larranaga, C. Mansilla, K. Medina, D. Moreno, E. Munoz, E. Pizarro, I. Reyes, P. Sanchez-Saez, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025aaaa - 2025-10-22 20:02:52 NOT / ALFOSC (None)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_g
 ▌ATLAS-MLO_ATLAS-01_cyan
   
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
22277 2025-10-22 20:02:52 NOT / ALFOSC 1200 Emma Johtela, Uliana Pylypenko, Emily Sageser, Jouni Valkjärvi None tns_2025aaaa_2025-10-22_20-02-52_NOT_ALFOSC_None.ascii tns_2025aaaa_2025-10-22_20-02-52_NOT_ALFOSC_None.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
wide-ATLAS ATLAS-TDO_ATLAS-05 2025-10-09 22:16:13 - 2025-10-09 22:16:13 2460958.42793 - 2460958.42793 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524058 2025-10-09 22:16:13 2460958.42793 19.22 ABMag wide-ATLAS ATLAS-TDO_ATLAS-05 30 Robot [Last non detection]
L-GOTO GOTO-N_GOTO-2 2025-09-16 20:55:00 - 2025-10-19 20:50:40 2460935.371527 - 2460968.368518 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
525094 2025-10-19 20:50:40 2460968.368518 18.34 0.06 ABMag L-GOTO GOTO-N_GOTO-2 180
525093 2025-09-16 20:55:00 2460935.371527 19.8 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
g-ZTF P48_ZTF-Cam 2025-10-08 05:14:31 - 2025-10-11 05:13:40 2460956.7184144 - 2460959.7178241 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
523050 2025-10-11 05:13:40 2460959.7178241 18.3361 0.139158 19.037 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
523049 2025-10-08 05:14:31 2460956.7184144 19.3511 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
cyan-ATLAS ATLAS-MLO_ATLAS-01 2025-10-12 06:24:23 - 2025-10-12 06:24:23 2460960.76693 - 2460960.76693 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524059 2025-10-12 06:24:23 2460960.76693 18.435 0.093 19.49 ABMag cyan-ATLAS ATLAS-MLO_ATLAS-01 30 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
274017 2025-10-20 07:20:06 GOTO_bot D. O'Neill, G. Ramsay, K. Ackley et al. GOTO GOTO 18:44:49.387 +58:04:12.94 2025-10-19 20:50:40.128 18.34 L-GOTO Other GOTO25itf GOTO N
273463 2025-10-15 12:50:45 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 18:44:49.384 +58:04:13.25 2025-10-12 06:24:22.752 18.435 cyan-ATLAS PSN ATLAS25msj ATLAS N
272952 2025-10-11 23:59:59 ALeRCE F. Forster, F.E. Bauer, G. Pignata et al. ALeRCE ZTF 18:44:49.366 +58:04:13.71 2025-10-11 05:13:40.002 18.3361 g-ZTF PSN GALEXASC J184449.82+580412.4 ZTF25abwjmwj ZTF Early SN candidate (g-rise > 0.34+-0.05 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/ZTF25abwjmwj 2025TNSTR4066....1F N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
22277 2025-10-23 12:42:33 Christina Humina Emma Johtela, Uliana Pylypenko, Emily Sageser, Jouni Valkjärvi, Christina Humina, Tuomas Kangas, Erkki Kankare (University of Turku), Niko Pyykkinen (NOT) None SN IIP 0.026 1 Classification was done using SNID (Blondin & Tonry 2007 2007ApJ...666.1024B) as part of a remote observing course at the University of Turku. AT 2025aaaa is best matched with type IIP around the peak and the light curve also shows the target being in early plateau-phase. Redshift is from spectral match, which roughly matches the redshift of the broad Halpha emission line. 2025TNSCR4262....1J
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
22277 2025-10-22 20:02:52 NOT / ALFOSC 1200 Emma Johtela, Uliana Pylypenko, Emily Sageser, Jouni Valkjärvi None tns_2025aaaa_2025-10-22_20-02-52_NOT_ALFOSC_None.ascii tns_2025aaaa_2025-10-22_20-02-52_NOT_ALFOSC_None.fits Object

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