RA/DEC (2000)
20:31:52.830 +27:40:17.26
307.970125 +27.671461
Type
CV
Redshift
Discovery ReportClassification Report
Reporting Group
GaiaAlerts
Discovering Data Source
GaiaAlerts
Discovery Date
2023-11-23 18:21:36.000
TNS AT
Y
Public
Y
Discovery Mag
14.47
Filter
G-Gaia
Reporter/s
S.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 team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2023ylu - 2023-11-12 18:54:43 Galileo / BC-Asi (None)z=
▌Show H at z=vexp= km/s
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▌Show Mg at z=vexp= km/s
▌Show Mg II at z=vexp= km/s
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▌Show [Ca II] at z=vexp= km/s
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌Gaia_Gaia-photometric_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
16453 2023-11-12 18:54:43 Galileo / BC-Asi 1200 Ochner.P; Cazzola.R Ochner.P; Cazzola.R None tns_2023ylu_2023-11-12.788_Galileo_BC-Asi.txt tns_2023ylu_2023-11-12.788_Galileo_BC-Asi.fits Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
G-Gaia Gaia_Gaia-photometric 2023-08-13 16:19:12 - 2023-11-23 18:21:36 2460170.18 - 2460272.265 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
376300 2023-11-23 18:21:36 2460272.265 14.47 0.2 ABMag G-Gaia Gaia_Gaia-photometric 60 Robot
376299 2023-08-13 16:19:12 2460170.18 21.5 ABMag G-Gaia Gaia_Gaia-photometric 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
194591 2023-11-25 19:10:30 Gaia_Bot1 S.T. Hodgkin, E. Breedt, A. Delgado et al. GaiaAlerts GaiaAlerts 20:31:52.830 +27:40:17.26 2023-11-23 18:21:36.000 14.47 G-Gaia Other Gaia23dix GaiaAlerts 5.5 mag outburst in blue Gaia source, candidate CV 2023TNSTR3066....1H N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
16366 2024-01-08 16:33:25 Vittorio Andreoli Andreoli.V ; Ochner.P : Castellani.F, Cazzola.R None CV 1 Low resolution spectra was obteined by 1.22-m tlescope + B&C spectrograph (with dispersion 2.25 Ang/pix) located in Asiago (Italy) on 2023-11-12.788 and with 0.25-m telescope + Alpy600 spectrograph (with dispersion 4.9 Ang/pix) located in Novezzina (Italy) on 2023-11-12.823, the spectra show emission of Halpha (6562.8 Ang) and 5573 Ang (sky background), absorption of Hbeta, Hdelta, Hgamma, Hepsilon and He I (4471 Ang) and has a blue continuum. Considered d=0.406 kpc from the 3D dust mapping (Green et al 2019) get E(B-V)≈0.00 B,V,R photometry was also collected with 0.4m telescope + Moravian G4 CCD full frame located in Novezzina (Italy) at 2023/11/12.788 with results B=13.961, V=13.466, R= 13.036 , (B-V)0 =0.495 . Gaia DR2 1857057959447151616 is also present in ZTF database at magnitude 17.9 (filter zg) that’s means Δmag ≈ 5 mag (referring to the magnitude of discovery) All this feature are typically of a dwarf nova outburst, we propose to classified TCP J20315286+2740166 (Gaia DR3 1857057959447151616) as a dwarf nova. 2024TNSCR..78....1V
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
16453 2023-11-12 18:54:43 Galileo / BC-Asi 1200 Ochner.P; Cazzola.R Ochner.P; Cazzola.R None tns_2023ylu_2023-11-12.788_Galileo_BC-Asi.txt tns_2023ylu_2023-11-12.788_Galileo_BC-Asi.fits Object

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