RA/DEC (2000)
18:22:55.930 +10:20:01.30
275.733042 +10.333694
Type
CV
Redshift
Discovery ReportClassification Report
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2025-04-20 20:19:43.392
TNS AT
Y
Public
Y
Discovery Mag
15.03
Filter
Clear-
Reporter/s
Mi Zhang, Jianlin Xu, Guoyou Sun, Jiangao Ruan, Jingyuan Zhao, Wenjie Zhou, Yong Ma, Ye, Zhuoyang Chen (Xingming Obs.), Hanjie Tan (AUUK), Guangwei Wu (NAAA), Xing Gao, Ali Esamdin, Chunhai Bai, Yong Wang (XAO), on behalf of the KATS team
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025hwl - 2025-04-22 00:38:53 Other / Other (None)z=
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   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 ▌Other_Other_Clear
   
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
20881 2025-04-22 00:38:53 Other / Other 1800 Ochner P., Ferrigno F Ochner P., Ferrigno F None tns_2025hwl_2025-04-22.027_Other_Other_None.txt tns_2025hwl_2025-04-22.027_Other_Other_None.fits Object We report the spectroscopic classification of AT2025hwl (TCP J18225593+1020013). A low resolution spectrum was obtained with the 1.22-m telescope and B&C spectrograph (dispersion: 2.25 Å/pixel) at Asiago Observatory (Italy) on 2025-04-22.027. The spectrum shows a blue continuum with Balmer absorption lines, except for Hα (6562.8 Å), which appears filled-up due to emission from the accretion disk. The Hβ (4861 Å) line exhibits a full width at half maximum (FWHM) of 1230 km/s. A likely progenitor is identified in ZTF data (Bellm et al. 2019) with a mean r-band magnitude of 18, implying a brightness increase of approximately 3 magnitudes (Δmag ≈ 3). These features are characteristic of a cataclysmic variable (CV). We propose that AT2025hwl be classified as a CV.
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
Clear- Other_Other 2025-04-20 20:19:43 - 2025-04-20 20:19:43 2460786.34703 - 2460786.34703 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
483013 2025-04-20 20:19:43 2460786.34703 15.03 0.12 19.5 VegaMag Clear- Other_Other 60 Xing Gao
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
252138 2025-04-20 23:16:06 Mi Zhang Mi Zhang,Jianlin Xu,Guoyou Sun et al. XOSS XOSS 18:22:55.930 +10:20:01.30 2025-04-20 20:19:43.392 15.03 Clear- Other KATS25H002 XOSS CV candidate classified by XOSS. Details can be found at http://xjltp.china-vo.org/kats25h002.html 2025TNSTR1453....1Z N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
20881 2025-04-22 11:19:30 Vittorio Andreoli Ochner P., Ferrigno F., and Andreoli V None CV 1 We report the spectroscopic classification of AT2025hwl (TCP J18225593+1020013). A low resolution spectrum was obtained with the 1.22-m telescope and B&C spectrograph (dispersion: 2.25 Å/pixel) at Asiago Observatory (Italy) on 2025-04-22.027. The spectrum shows a blue continuum with Balmer absorption lines, except for Hα (6562.8 Å), which appears filled-up due to emission from the accretion disk. The Hβ (4861 Å) line exhibits a full width at half maximum (FWHM) of 1230 km/s. A likely progenitor is identified in ZTF data (Bellm et al. 2019) with a mean r-band magnitude of 18, implying a brightness increase of approximately 3 magnitudes (Δmag ≈ 3). These features are characteristic of a cataclysmic variable (CV). We propose that AT2025hwl be classified as a CV. 2025TNSCR1500....1P
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
20881 2025-04-22 00:38:53 Other / Other 1800 Ochner P., Ferrigno F Ochner P., Ferrigno F None tns_2025hwl_2025-04-22.027_Other_Other_None.txt tns_2025hwl_2025-04-22.027_Other_Other_None.fits Object We report the spectroscopic classification of AT2025hwl (TCP J18225593+1020013). A low resolution spectrum was obtained with the 1.22-m telescope and B&C spectrograph (dispersion: 2.25 Å/pixel) at Asiago Observatory (Italy) on 2025-04-22.027. The spectrum shows a blue continuum with Balmer absorption lines, except for Hα (6562.8 Å), which appears filled-up due to emission from the accretion disk. The Hβ (4861 Å) line exhibits a full width at half maximum (FWHM) of 1230 km/s. A likely progenitor is identified in ZTF data (Bellm et al. 2019) with a mean r-band magnitude of 18, implying a brightness increase of approximately 3 magnitudes (Δmag ≈ 3). These features are characteristic of a cataclysmic variable (CV). We propose that AT2025hwl be classified as a CV.

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