RA/DEC (2000)
16:53:20.693 -08:25:32.30
253.3362198 -8.4256384
Type
CV
Redshift
0
Discovery ReportClassification Report
Related AstroNotes: 2025-176
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-05-22 06:34:49.998
TNS AT
Y
Public
Y
Discovery Mag
18.7831
Filter
r-ZTF
Reporter/s
Nabeel Rehemtulla (CIERA, NU), Wynn Jacobson-Galán (Caltech), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025ljt - 2025-06-02 01:40:28 NOT / ALFOSC (BlackGEM)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
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▌Show C IV at z=vexp= km/s
▌Show N II at z=vexp= km/s
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▌Show N V at z=vexp= km/s
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▌Show [O I] at z=vexp= km/s
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▌Show [O II] at z=vexp= km/s
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▌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
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▌Show Tellurics 
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌GOTO-S_GOTO-4_L
 ▌GOTO-N_GOTO-2_L
 ▌BG3_BlackGEM-Cam3_BG-q
 ▌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
21247 2025-06-02 01:40:28 NOT / ALFOSC 300 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025ljt_2460828.569767824_NOT_ALFOSC_BlackGEM.txt tns_2025ljt_2460828.569767824_NOT_ALFOSC_BlackGEM.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-05-24 13:56:03 - 2025-05-24 13:56:03 2460820.080592 - 2460820.080592 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490972 2025-05-24 13:56:03 2460820.080592 17.21 0.03 ABMag L-GOTO GOTO-S_GOTO-4 180
L-GOTO GOTO-N_GOTO-2 2025-05-20 23:58:46 - 2025-05-20 23:58:46 2460816.499141 - 2460816.499141 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490971 2025-05-20 23:58:46 2460816.499141 19.5 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
BG-q-BlackGem BG3_BlackGEM-Cam3 2025-05-20 03:26:40 - 2025-06-03 04:23:22 2460815.6435185 - 2460829.6828935 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
493466 2025-06-03 04:23:22 2460829.6828935 18.27 0.06 19.86 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic
493465 2025-05-20 03:26:40 2460815.6435185 21.03 ABMag BG-q-BlackGem BG3_BlackGEM-Cam3 60 robotic [Last non detection]
r-ZTF P48_ZTF-Cam 2025-05-22 06:34:50 - 2025-05-23 09:13:53 2460817.7741898 - 2460818.8846412 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490350 2025-05-23 09:13:53 2460818.8846412 16.9402 0.0369207 ABMag r-ZTF P48_ZTF-Cam
490349 2025-05-22 06:34:50 2460817.7741898 18.7831 0.0711706 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-05-21 10:48:07 - 2025-05-21 10:48:07 2460816.950081 - 2460816.950081 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
490348 2025-05-21 10:48:07 2460816.950081 20.0666 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
257689 2025-06-03 09:23:02 BlackGEM_Bot1 J. A. Paice,H. Tranin,F. Stoppa et al. BlackGEM BlackGEM 16:53:20.716 -08:25:32.24 2025-06-03 04:23:22.000 18.27 BG-q-BlackGem 1 PSN BGEM J165320.71-082532.2 BlackGEM N
Related files
File Comments Last Modified (UT) Modified By
tns_2025ljt_atrep_257689_BlackGEM.pdf Finding Chart 2025-06-03 09:23:04 BlackGEM_Bot1
256421 2025-05-24 15:06:00 GOTO_bot A. Kumar,K. Ackley,M. Dyer et al. GOTO GOTO 16:53:20.688 -08:25:32.46 2025-05-24 13:56:02.976 17.21 L-GOTO Other GOTO25dan GOTO N
256051 2025-05-23 09:34:14 BTSbot_bot Nabeel Rehemtulla (CIERA,NU),Wynn Jacobson-Galán (Caltech) et al. ZTF ZTF 16:53:20.693 -08:25:32.30 2025-05-22 06:34:49.998 18.7831 r-ZTF PSN ZTF25aardghz ZTF Bright (m_peak <= 18.5) transient candidate identified autonomously by BTSbot (Rehemtulla et al. 2024; arXiv:2401.15167). 2025TNSTR1925....1R N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21247 2025-06-06 22:27:37 Nadejda Blagorodnova Mujortova Nadejda Blagorodnova Mujortova BlackGEM CV 0 1 Add BlackGEM, CET-3PO 2025TNSCR2126....1M
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
21247 2025-06-02 01:40:28 NOT / ALFOSC 300 Gerard Garcia-Moreno, Mathias Gort Gerard Garcia-Moreno BlackGEM tns_2025ljt_2460828.569767824_NOT_ALFOSC_BlackGEM.txt tns_2025ljt_2460828.569767824_NOT_ALFOSC_BlackGEM.fits Object

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