AT 2021urk
RA/DEC (2000)
00:42:45.350 +41:52:22.62
10.688958 +41.87295
Type
Nova
Redshift
0
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2021-07-26 20:58:45.000
TNS AT
Y
Public
Y
Host Name
M31
Discovery Mag
17.9
Filter
Clear-
Reporter/s
Mi Zhang, Xing Gao (Xingming Observatory)

Spectra

 AT_2021urk - 2021-08-09 01:38:00 Other / Other (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),
Spectra
SelectIDObs-date (UT)Tel / InstExp-TimeObserver/sReducer/sGroupSpectrum ascii fileSpectrum fits fileSpec. TypeAssoc. GroupsEnd prop. periodRemarks
103962021-08-09 01:38:00Other / Other2400Claudio Balcon (Belluno A.O.)Claudio BalconNone tns_2021urk_2021-08-09_01-38-00_Other_Other.dat tns_2021urk_2021-08-09_01-38-00_Other_Other.fitObjectI obtained the low-resolution spectrum R~100 using the FOSC-ES32 spectrograph attached to a 0.2m telescope, in the course of Italian Supernovae Search Project.
Light Curves
FilterTel / InstObs-date rangePhotometry
Clear-Other_Other2016-07-04 04:38:00 - 2021-08-08 04:27:456
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2338762021-08-08 04:27:4517.819.6VegaMagClear-Other_Other180RobotMASTER-IAC
2338752021-08-08 04:24:0917.819.6VegaMagClear-Other_Other180RobotMASTER-IAC
2317802021-08-02 21:08:4917.820.5ABMagClear-Other_Other300Xing GaoThe transient was discovered on several 300-s survey images (limiting mag about 20.5) taken by Xing Gao using HMT at Xingming Observatory #3 (N88). Images can be found at: http://xjltp.china-vo.org/xm56mz.html
2317792021-07-26 20:58:4517.918.5ABMagClear-Other_Other30Xing GaoThe transient was discovered on several 30-s survey images (limiting mag about 18.5) taken by Xing Gao using HMT at Xingming Observatory #2 (N89). Images can be found at: http://xjltp.china-vo.org/xm56mz.html
2317782021-07-25 19:02:5118.5ABMagClear-Other_Other30Xing Gao[Last non detection] The transient was discovered on several 30-s survey images (limiting mag about 18.5) taken by Xing Gao using HMT at Xingming Observatory #2 (N89). Images can be found at: http://xjltp.china-vo.org/xm56mz.html
2338742016-07-04 04:38:0021.3VegaMagClear-Other_Other540Robot[Last non detection] MASTER-IAC
G-GaiaGaia_Gaia-photometric2021-07-11 21:05:46 - 2021-08-09 01:09:072
Photometry
IDObs-dateMag. / FluxErrLim. Mag./FluxUnitsFilterTel / InstExp-timeObserver/sRemarks
2338392021-08-09 01:09:0716.760.2ABMagG-GaiaGaia_Gaia-photometric60Robot
2338382021-07-11 21:05:4621.5ABMagG-GaiaGaia_Gaia-photometricRobot[Last non detection]
AT Reports
IDTime received (UT)SenderReporter/sReportting groupDisc. Data SourceRADECDiscovery date (UT)Discovery Mag.FilterRelated filesAT TypeInternal nameAssoc. GroupsEnd prop. periodRemarks
1198852021-08-10 09:42:06MASTERK. Zhirkov, V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University)MASTERMASTER00:42:45.360+41:52:21.902021-08-08 04:24:09.21617.8Clear-PNVMASTER OT J004245.36+415221.9MASTER
1198672021-08-10 06:55:24Gaia_Bot1S.T. Hodgkin, E. Breedt, A. Delgado, D.L. Harrison, M. van Leeuwen, G. Rixon, T. Wevers, A. Yoldas (IoA Cambridge), N. Ihanec, K. Kruszyńska, K.A. Rybicki, Ł. Wyrzykowski (Warsaw University Astronomical Observatory), Z. Kostrzewa-Rutkowska (Leiden Observatory), D. Eappachen (SRON/RU), G. Marton (Konkoly Observatory), on behalf of the Gaia Alerts teamGaiaAlertsGaiaAlerts00:42:45.350+41:52:22.622021-08-09 01:09:07.20016.76G-GaiaPSNGaia21drrGaiaAlertsGaia detection of Nova in M31
1188972021-08-02 21:35:06sammimasMi Zhang, Xing Gao (Xingming Observatory)XOSSXOSS00:42:45.420+41:52:23.302021-07-26 20:58:45.00017.9Clear-PNVXM56MZXOSSMi Zhang, Xing Gao (Xingming Observatory), report the discovery of a possible nova (mag approximately 17.9 on several 30-s survey image (limiting mag about 18.5) taken by Xing Gao at Xingming Observatory #2 (N89) around July. 26.87413 UTC using a unfiltered CCD ( 0.5-m f/4 reflector ). The transient approximately located at R.A.=00h42m45.42s +41d52’23”.3 (equinox 2000.0). Which is about 12.4" east and 2174.8" north of the center of the NGC224(M31). Nothing is visible at this position on archival images taken on July. 25.79365 (limiting mag 18.5) . Images can be found at: http://xjltp.china-vo.org/xm56mz.html
Classification Reports
IDTime received (UT)SenderClassifier/sGroupClassificationRedshiftRelated filesAssoc. GroupsEnd prop. periodRemarksADS Bibcode
103802021-08-09 02:21:01balclaClaudio BalconNoneNova0The spectrum resembles that of a Nova.2021TNSCR2742....1B

Comments

2021urk was measured as g (Gaia) = 18.18 +/- 0.13 on UT 2021 Aug. 13 (08:44 - 900 sec exposure)

Rothney Astrophysical Observatory (University of Calgary) 0.65-m Baker-Nunn Schmidt + CCD

Object coordinates updated according to AT-report 119867 of Group GaiaAlerts
Previous RA, DEC: 00:42:45.420, +41:52:23.30 (10.68925, +41.873139)
Updated RA, DEC: 00:42:45.350, +41:52:22.62 (10.688958, 41.87295)