RA/DEC (2000)
15:25:39.284 +17:40:50.53
231.413684 +17.6807034
Type
TDE
Redshift
0.0835
Discovery ReportClassification Report
Related AstroNotes: 2025-9
Reporting Group
ZTF
Discovering Data Source
ZTF
Discovery Date
2024-12-05 13:24:45.996
TNS AT
Y
Public
Y
Discovery Mag
19.7968
Filter
r-ZTF
Reporter/s
Eli Gendreau-Distler (UC Berkeley), Jesper Sollerman (SU), Christoffer Fremling (Caltech), Daniel Perley (LJMU), Theophile du Laz (Caltech) on behalf of ZTF
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2024aepd - 2025-01-03 06:28:25 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

 ▌GOTO-N_GOTO-1_L_
 ▌P48_ZTF-Cam_r_
 ▌P48_ZTF-Cam_g_
 ▌ATLAS-HKO_ATLAS-02_orange_
   
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
20116 2025-01-03 06:28:25 NOT / ALFOSC 900 A. Theil, S. Grund Panos Charalampopoulos None tns_2024aepd_2025-01-03_06-28-24.622_NOT_ALFOSC_None.ascii Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-1 2024-12-19 06:21:24 - 2024-12-28 06:27:44 2460663.764859 - 2460672.769256 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
457040 2024-12-28 06:27:44 2460672.769256 18.13 0.18 ABMag L-GOTO GOTO-N_GOTO-1 180
457039 2024-12-19 06:21:24 2460663.764859 17.8 ABMag L-GOTO GOTO-N_GOTO-1 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2024-12-05 13:21:50 - 2024-12-05 13:24:46 2460650.0568287 - 2460650.0588657 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
454614 2024-12-05 13:24:46 2460650.0588657 19.7968 0.248362 ABMag r-ZTF P48_ZTF-Cam
454613 2024-12-05 13:21:50 2460650.0568287 19.6176 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2024-12-21 13:05:09 - 2024-12-21 13:05:09 2460666.0452431 - 2460666.0452431 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
454615 2024-12-21 13:05:09 2460666.0452431 18.2305 0.0659761 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2024-12-18 15:52:37 - 2024-12-21 15:22:53 2460663.16154 - 2460666.14089 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
454668 2024-12-21 15:22:53 2460666.14089 18.456 0.137 18.98 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
454667 2024-12-18 15:52:37 2460663.16154 18.57 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot [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 Bibcode Unreal Auto classification
238201 2024-12-30 10:20:55 GOTO_bot A. Kumar,G. Ramsay,K. Ackley et al. GOTO GOTO 15:25:39.291 +17:40:50.56 2024-12-28 06:27:44.064 18.13 L-GOTO Other GOTO24jqq GOTO N
236782 2024-12-22 21:37:05 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 15:25:39.304 +17:40:50.43 2024-12-21 15:22:52.896 18.456 orange-ATLAS PSN ATLAS24rqf ATLAS N
236757 2024-12-22 13:25:17 Fritz Eli Gendreau-Distler (UC Berkeley),Jesper Sollerman (SU),Christoffer Fremling (Caltech) et al. ZTF ZTF 15:25:39.284 +17:40:50.53 2024-12-05 13:24:45.996 19.7968 r-ZTF PSN ZTF24abyhjvc ZTF 2024TNSTR5019....1G N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
20116 2025-01-10 10:38:17 Panos Charalampopoulos Panos Charalampopoulos None TDE 0.0835 1 2 We obtained two NOT/ALFOSC optical spectra (separated by 6 days) of the transient AT 2024aepd located in the nucleus of its host galaxy (see AstroNote 2025-9). The spectra are blue and show broad emission lines. At a redshift of z~0.0835, those lines can be identified as Halpha, a blend of Hbeta, HeII 4686 and NIII 4640, and potentially NIII 4100. At this redshift, the peak absolute magnitude in the g-band is M = -20.09. There are no evident host galaxy lines and no spectroscopic redshift for the host. Based on the spectra, the location of the transient, the absolute magnitude and its persistent blue optical colours (g-r = -0.43 at peak), we tentatively classify AT 2024aepd as a tidal disruption event. 2025TNSCR.144....1C
Related files
File Comments Last Modified (UT) Modified By
tns_2024aepd_atrep_20116.png NOT/ALFOSC spectra of AT 2024aepd on MJD = 60678.27 and MJD = 60684.23. Potential TDE and host galaxy lines are marked. 2025-01-10 10:38:17 Panos Charalampopoulos
tns_2024aepd_atrep_20116_0.png Classifications were done using NGSF (Next Generation SuperFit; AstroNote 2022-191, Howell et al. 2005 2005ApJ...634.1190H). 2025-01-10 10:38:17 Panos Charalampopoulos
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
20116 2025-01-03 06:28:25 NOT / ALFOSC 900 A. Theil, S. Grund Panos Charalampopoulos None tns_2024aepd_2025-01-03_06-28-24.622_NOT_ALFOSC_None.ascii Object

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