RA/DEC (2000)
18:45:32.005 +23:49:28.96
281.3833544 +23.8247122
Type
CV
Redshift
0
Reporting Group
XOSS
Discovering Data Source
XOSS
Discovery Date
2025-03-20 22:01:37.920
TNS AT
Y
Public
Y
Discovery Mag
16.25
Filter
Clear-
Reporter/s
Jianlin Xu, Mi Zhang, 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

Spectra

 AT_2025fbc - 2025-03-24 04:16:30 LT / SPRAT (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
z-step:   v-step: 
   Binning factor: (rounded to nearest integer >1)
Mouse hovers at WL: 0 (rest),

Light curves

 P48_ZTF-Cam_r
 P48_ZTF-Cam_g
 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
20675 2025-03-24 04:16:30 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho Jacob Wise ZTF tns_2025fbc_2025-03-24_04-16-30.059_LT_SPRAT_ZTF.spec Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
r-ZTF P48_ZTF-Cam 2025-03-16 11:38:31 - 2025-03-16 11:38:31 2460750.985081 - 2460750.985081 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
480100 2025-03-16 11:38:31 2460750.985081 16.3374 0.045469 ABMag r-ZTF P48_ZTF-Cam
g-ZTF P48_ZTF-Cam 2025-03-10 12:19:22 - 2025-03-30 12:06:44 2460745.0134491 - 2460765.0046759 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
480101 2025-03-30 12:06:44 2460765.0046759 16.8896 0.0338222 ABMag g-ZTF P48_ZTF-Cam
480099 2025-03-10 12:19:22 2460745.0134491 19.3758 ABMag g-ZTF P48_ZTF-Cam [Last non detection]
Clear- Other_Other 2025-03-20 22:01:38 - 2025-03-20 22:01:38 2460755.4178 - 2460755.4178 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
477328 2025-03-20 22:01:38 2460755.4178 16.25 0.15 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
250500 2025-04-01 18:22:15 Fritz Andreas Roberts Betz (UC Berkeley), Daniel Perley (LJMU), Christoffer Fremling (Caltech) et al. ZTF ZTF 18:45:32.005 +23:49:28.96 2025-03-16 11:38:30.998 16.3374 r-ZTF PSN ZTF25aaizuju ZTF N
249108 2025-03-21 09:29:04 Mi Zhang Jianlin Xu, Mi Zhang, Guoyou Sun et al. XOSS XOSS 18:45:31.980 +23:49:28.90 2025-03-20 22:01:37.920 16.25 Clear- Other KATS25F020 XOSS CV candidate classified by XOSS. Details can be found at http://xjltp.china-vo.org/kats25f020.html 2025TNSTR1073....1X N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
20675 2025-03-31 09:12:48 Jacob Wise Jacob Wise (LJMU), Daniel Perley (LJMU), K-Ryan Hinds (LJMU), Aleksandra Bochenek (LJMU), Zoe McGrath (LJMU), Anna Ho (Cornell) ZTF CV 0 1 ZTF Spectrum displays hydrogen absorption features at z = 0. This, combined with the ZTF lightcurve's sharp and dramatic rise of >3 mag in <3 days motivates us to classify this as a CV. 2025TNSCR1221....1W
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
20675 2025-03-24 04:16:30 LT / SPRAT Daniel Perley, Jacob Wise, K-Ryan Hinds, Aleksandra Bochenek, Zoe McGrath, Anna Ho Jacob Wise ZTF tns_2025fbc_2025-03-24_04-16-30.059_LT_SPRAT_ZTF.spec Object

Comments

TNS
System

Object coordinates updated

Object coordinates updated according to AT-report 250500 of Group ZTF
Previous RA, DEC: 18:45:31.980, +23:49:28.90 (281.38325, +23.824694)
Updated RA, DEC: 18:45:32.005, +23:49:28.96 (281.3833544, +23.8247122)