RA/DEC (2000)
03:04:26.347 +04:44:44.32
46.109779375 +4.7456443
Type
TDE
Redshift
0.152
Discovery ReportClassification Report
Reporting Group
ALeRCE
Discovering Data Source
ZTF
Discovery Date
2021-01-04 04:13:49.996
TNS AT
Y
Public
Y
Host Name
SDSS J030426.33+044444.2
Host Redshift
0.403
Comments
[Prefix updated to TDE by admin on 2025-01-26]
Discovery Mag
20.1812
Filter
r-ZTF
Reporter/s
A. Munoz-Arancibia, F. Forster, F.E. Bauer, L. Hernandez-Garcia, G. Pignata, L. Galbany, E. Camacho, J. Silva-Farfan, A. Mourao, J. Arredondo, G. Cabrera-Vives, R. Carrasco-Davis, P.A. Estevez, P. Huijse, E. Reyes, I. Reyes, P. Sanchez-Saez, C. Valenzuela, E. Castillo, D. Ruz-Mieres, D. Rodriguez-Mancini, M. Catelan, S. Eyheramendy, M.J. Graham on behalf of the ALeRCE broker
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌TDE_2021lo - 2022-02-25 05:17:13 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

 ▌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
12097 2022-02-25 05:17:13 Keck1 / LRIS 600 Matthew Graham, Antonio Rodriguez Matthew Graham, Yuhan Yao ZTF tns_2021lo_2459635.72029_Keck1_LRIS_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2021-01-04 04:13:50 - 2021-01-06 05:09:34 2459218.6762731 - 2459220.7149769 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
184309 2021-01-06 05:09:34 2459220.7149769 19.9323 0.155951 20.2736 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
184306 2021-01-04 04:13:50 2459218.6762731 20.1812 0.226797 20.1419 ABMag r-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
g-ZTF P48_ZTF-Cam 2021-01-02 08:17:31 - 2021-01-06 04:34:58 2459216.8454977 - 2459220.6909491 3
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
184308 2021-01-06 04:34:58 2459220.6909491 20.0091 0.168598 20.6164 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
184307 2021-01-04 05:09:57 2459218.7152431 20.3712 0.254526 20.4099 ABMag g-ZTF P48_ZTF-Cam 30 Robot Data provided by ZTF
184305 2021-01-02 08:17:31 2459216.8454977 18.7747 ABMag g-ZTF P48_ZTF-Cam 30 Robot [Last non detection] Data provided by ZTF
orange-ATLAS ATLAS-HKO_ATLAS-02 2021-01-30 06:57:36 - 2021-01-31 06:04:19 2459244.79 - 2459245.753 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
189678 2021-01-31 06:04:19 2459245.753 19.373 0.18 19.76 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
189677 2021-01-30 06:57:36 2459244.79 19.19 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 ADS Bibcode Unreal Auto classification
98295 2021-02-04 17:06:27 ATLAS_Bot1 J. Tonry, L. Denneau, A. Heinze et al. ATLAS ATLAS 03:04:26.340 +04:44:44.54 2021-01-31 06:04:19.200 19.373 orange-ATLAS PSN ATLAS21dma ATLAS N
95751 2021-01-06 22:18:24 ALeRCE A. Munoz-Arancibia, F. Forster, F.E. Bauer et al. ALeRCE ZTF 03:04:26.347 +04:44:44.32 2021-01-04 04:13:49.996 20.1812 r-ZTF PSN SDSS J030426.33+044444.2 ZTF21aabiipy ZTF SN candidate classified using ALeRCE's stamp classifier - see http://arxiv.org/abs/2008.03309 - and the public ZTF stream. Discovery image and light curve in http://alerce.online/object/ZTF21aabiipy 2021TNSTR..54....1M N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
12040 2022-03-05 18:45:49 Yuhan Yao Yuhan Yao, Matthew Graham, Antonio Rodriguez, Jean Somalwar (Caltech), Sjoert van Velzen (Leiden University), Suvi Gezari (STScI), Erica Hammerstein (UMD) ZTF TDE 0.152 1 ZTF In a retrospective search of tidal disruption event (TDE) candidates in the ZTF database, we selected ZTF21aabiipy/AT2021lo as a TDE candidate based on its light curve properties (long rise time, no sign of cooling, post-peak plateau). A Keck/LRIS spectrum was obtained on 2022 Feb 25, roughly one year after the peak of this optical transient. We observed broad emission lines of Halpha and He II complex at z=0.152, suggesting that AT2021lo is a TDE-H+He. We also observed host galaxy lines of [N II] emission and Ca II absorption at the same redshift. 2022TNSCR.620....1Y
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
12097 2022-02-25 05:17:13 Keck1 / LRIS 600 Matthew Graham, Antonio Rodriguez Matthew Graham, Yuhan Yao ZTF tns_2021lo_2459635.72029_Keck1_LRIS_ZTF.spec Object

Comments