RA/DEC (2000)
04:32:02.901 -10:24:07.67
68.012088 -10.402131
Type
AGN
Redshift
0.037
Discovery ReportClassification Report
Related AstroNotes: 2025-304
Reporting Group
BlackGEM
Discovering Data Source
BlackGEM
Discovery Date
2025-10-14 07:01:47.000
TNS AT
Y
Public
Y
Discovery Mag
18.5
Filter
BG-q-BlackGem
Reporter/s
S. Faris, H. Tranin, F. Stoppa, D. Pieterse, G. Ramsay, P. Groot, P. Vreeswijk, N. Blagorodnova, J. van Roestel, H. Wichern, S. Scaringi
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025aaxf - 2025-10-21 05:37:35 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

 ▌BG4_BlackGEM-Cam4_BG-q
 ▌BG3_BlackGEM-Cam3_BG-q
   
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
22262 2025-10-21 05:37:35 NOT / ALFOSC 1100 Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko None tns_2025aaxf_2025-10-21_05-37-35_NOT_ALFOSC_None.txt tns_2025aaxf_2025-10-21_05-37-35_NOT_ALFOSC_None.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-10-07 06:54:52 - 2025-10-07 06:54:52 2460955.7881019 - 2460955.7881019 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524941 2025-10-07 06:54:52 2460955.7881019 19.39 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-10-14 07:01:47 - 2025-10-14 07:01:47 2460962.7929051 - 2460962.7929051 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
524942 2025-10-14 07:01:47 2460962.7929051 18.5 0.1 20.34 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
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
273943 2025-10-19 14:45:02 BlackGEM_Bot1 S. Faris, H. Tranin, F. Stoppa et al. BlackGEM BlackGEM 04:32:02.901 -10:24:07.67 2025-10-14 07:01:47.000 18.5 BG-q-BlackGem PSN BGEM J043202.90-102407.7 BlackGEM 2025TNSTR4183....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
22262 2025-10-21 13:33:34 Tuomas Kangas Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko, Tuomas Kangas, Christina Humina, Erkki Kankare (University of Turku), Niko Pyykkinen (NOT) None AGN 0.037 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 2025aaxf is matched by an AGN spectrum, and its coordinates correspond to the ZTF target ZTF19aagzanb with a long variable light curve. The redshift is based on narrow H I and O III lines in the spectrum. 2025TNSCR4231....1V
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
22262 2025-10-21 05:37:35 NOT / ALFOSC 1100 Jouni Valkjärvi, Emma Johtela, Emily Sageser, Uliana Pylypenko None tns_2025aaxf_2025-10-21_05-37-35_NOT_ALFOSC_None.txt tns_2025aaxf_2025-10-21_05-37-35_NOT_ALFOSC_None.fits Object

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