RA/DEC (2000)
13:53:09.988 +09:44:25.35
208.2916185 +9.7403742
Type
TDE
Redshift
0.133
Discovery ReportClassification Report
Related AstroNotes: 2021-83
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2021-01-12 14:52:48.000
TNS AT
Y
Public
Y
Discovery Mag
19.205
Filter
cyan-ATLAS
Reporter/s
J. Tonry, L. Denneau, A. Heinze, H. Weiland (IfA, University of Hawaii), B. Stalder (LSST), A. Rest (STScI), C. Stubbs (Harvard University), K. W. Smith, S. J. Smartt, D. R. Young, S. Srivastav, O. McBrien, M. Fulton, J. Gillanders (Queen's University Belfast), T.-W. Chen (MPE), D. E. Wright (University of Minnesota), J. Anderson (ESO)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2021ack - 2021-02-17 00:00:00 LDT / Deveny-LMI (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-MLO_ATLAS-01_orange_
 ▌ATLAS-HKO_ATLAS-02_cyan_
   
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
9131 2021-02-17 00:00:00 LDT / Deveny-LMI E. Hammerstein ZTF tns_2021ack_2021-02-17_00-00-00_DCT_Deveny-LMI_ZTF.ascii Object 2022-04-12
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2020-12-20 12:25:46 - 2020-12-20 12:25:46 2459204.0178935 - 2459204.0178935 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
196065 2020-12-20 12:25:46 2459204.0178935 19.8594 ABMag r-ZTF P48_ZTF-Cam [Last non detection]
g-ZTF P48_ZTF-Cam 2020-12-20 13:14:15 - 2020-12-20 13:14:15 2459204.0515625 - 2459204.0515625 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
196066 2020-12-20 13:14:15 2459204.0515625 20.2049 0.203252 ABMag g-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-MLO_ATLAS-01 2021-01-06 14:26:53 - 2021-01-06 14:26:53 2459221.102 - 2459221.102 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
186216 2021-01-06 14:26:53 2459221.102 19.07 ABMag orange-ATLAS ATLAS-MLO_ATLAS-01 30 Robot [Last non detection]
cyan-ATLAS ATLAS-HKO_ATLAS-02 2021-01-12 14:52:48 - 2021-01-12 14:52:48 2459227.12 - 2459227.12 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
186217 2021-01-12 14:52:48 2459227.12 19.205 0.157 19.76 ABMag cyan-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
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
101283 2021-03-05 17:26:06 Erica Hammerstein Erica Hammerstein,Suvi Gezari,Shri Kulkarni et al. ZTF ZTF 13:53:09.988 +09:44:25.35 2020-12-20 13:14:14.784 20.2049 g-ZTF PSN ZTF20acyydkh ZTF N
96558 2021-01-12 23:42:42 ATLAS_Bot1 J. Tonry,L. Denneau,A. Heinze et al. ATLAS ATLAS 13:53:09.967 +09:44:25.32 2021-01-12 14:52:48.000 19.205 cyan-ATLAS PSN ATLAS21blz ATLAS 2021TNSTR.114....1T N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
9121 2021-03-08 19:12:45 Erica Hammerstein Erica Hammerstein, Suvi Gezari, Sjoert van Velzen, Shri Kulkarni, Brad Cenko, Yuhan Yao, on behalf of the ZTF collaboration ZTF TDE 0.133 1 Add ZTF We report the classification of the optical transient ZTF20acyydkh/AT2021ack (RA=13:53:09.99 Dec=+09:44:25.35) as a tidal disruption event (TDE) due to its persistent blue optical colors and follow-up spectrum. ZTF20acyydkh/AT2021ack was first reported to TNS as ATLAS21blz on 2021 Jan 12 but was first detected in the Zwicky Transient Facility (ZTF) MSIP Northern Sky Survey on 2020 Dec 20 at a magnitude of g ~ 20.2. The transient is now post-peak with persistent blue optical color (g-r ~ -0.87 mag). A spectrum with the Lowell Discovery Telescope DeVeny Spectrograph was taken on 2021 Feb 17. This follow-up spectrum displayed a blue continuum with broad Hα, He II λ4686, and N III λ4640. We place the transient and its host galaxy at a redshift of z = 0.133 from host stellar absorption lines. 2021TNSCR.732....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
9131 2021-02-17 00:00:00 LDT / Deveny-LMI E. Hammerstein ZTF tns_2021ack_2021-02-17_00-00-00_DCT_Deveny-LMI_ZTF.ascii Object 2022-04-12

Comments

TNS
System

Fri, 03/05/2021 - 17:26

Object coordinates updated

Object coordinates updated according to AT-report 101283 of Group ZTF
Previous RA, DEC: 13:53:09.967, +09:44:25.32 (208.2915275, +9.7403675)
Updated RA, DEC: 13:53:09.988, +09:44:25.35 (208.2916185, 9.7403742)