RA/DEC (2000)
09:25:19.826 +23:30:09.54
141.3326096 +23.502649
Type
TDE-featureless
Redshift
0.144
Discovery ReportClassification Report
Related AstroNotes: DRAFT-2133, 2025-127
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2025-02-16 06:35:58.004
TNS AT
Y
Public
Y
Discovery Mag
20.0092
Filter
g-ZTF
Reporter/s
Daniel Perley (LJMU), Christoffer Fremling (Caltech), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌TDE_2025cyj - 2025-04-30 00:14:40 Keck1 / LRIS (ZTF)z=
 ▌TDE_2025cyj - 2025-04-27 00:00:00 Keck1 / LRIS (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

 ▌LAST_LAST-Cam_Clear
 ▌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
21747 2025-04-30 00:14:40 Keck1 / LRIS J. Somalwar J. Somalwar ZTF tns_2025cyj_2025-04-30_00-14-40_Keck1_LRIS_ZTF.spec Object
20922 2025-04-27 00:00:00 Keck1 / LRIS J. Somalwar J. Somalwar ZTF tns_2025cyj_2025-04-27_00-00-00_Keck1_LRIS_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- LAST_LAST-Cam 2025-02-28 19:09:22 - 2025-03-18 19:16:40 2460735.29817 - 2460753.30324 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
476784 2025-03-18 19:16:40 2460753.30324 19.79 ABMag Clear- LAST_LAST-Cam 400
476783 2025-02-28 19:09:22 2460735.29817 20.14 ABMag Clear- LAST_LAST-Cam 400 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-02-09 09:22:28 - 2025-02-09 09:22:28 2460715.8906019 - 2460715.8906019 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
472551 2025-02-09 09:22:28 2460715.8906019 17.9399 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2025-02-16 06:35:58 - 2025-02-28 07:18:13 2460722.7749769 - 2460734.8043171 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
472553 2025-02-28 07:18:13 2460734.8043171 19.9191 0.166003 ABMag g-ZTF P48_ZTF-Cam
472552 2025-02-16 06:35:58 2460722.7749769 20.0092 0.299835 ABMag g-ZTF P48_ZTF-Cam
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
248845 2025-03-18 19:52:01 LAST_Bot1 R. Konno (WIS), E. Zimmerman (WIS), A. Horowicz (WIS) et al. LAST LAST 09:25:19.781 +23:30:09.96 2025-03-18 19:16:39.936 19.79 Clear- PSN LAST N
246261 2025-02-28 11:48:23 Fritz Daniel Perley (LJMU), Christoffer Fremling (Caltech), Theophile du Laz (Caltech) on behalf of ZTF ZTF ZTF 09:25:19.826 +23:30:09.54 2025-02-16 06:35:58.004 20.0092 g-ZTF PSN ZTF25aagfhmz ZTF 2025TNSTR.831....1P N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21747 2025-08-11 14:28:49 Robert Stein Erica Hammerstein (UC Berkeley), Robert Stein (JSI) on behalf of the ZTF TDE/AGN working group ZTF TDE-featureless 0.144 1 ZTF Classification updated from TDE to TDE-featureless with same spectrum 2025TNSCR3149....1H
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
21747 2025-04-30 00:14:40 Keck1 / LRIS J. Somalwar J. Somalwar ZTF tns_2025cyj_2025-04-30_00-14-40_Keck1_LRIS_ZTF.spec Object
20922 2025-04-30 00:14:40 Erica Hammerstein Erica Hammerstein on behalf of the ZTF TDE/AGN working group ZTF TDE 0.144 1 ZTF Spectrum shows a steep, blue continuum after performing SDSS host galaxy subtraction. There are no obvious features, but the long light curve rise time, featureless nature, and host galaxy may point toward an association with the TDE-featureless class of Hammerstein+2023. 2025TNSCR1606....1H
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
20922 2025-04-27 00:00:00 Keck1 / LRIS J. Somalwar J. Somalwar ZTF tns_2025cyj_2025-04-27_00-00-00_Keck1_LRIS_ZTF.spec Object

Comments