RA/DEC (2000)
00:35:15.726 -44:04:47.98
8.815525 -44.079994
Type
Varstar
Redshift
0
Discovery ReportClassification Report
Related AstroNotes: 2025-221
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-06-18 08:51:12.960
TNS AT
Y
Public
Y
Discovery Mag
18.571
Filter
orange-ATLAS
Reporter/s
J. Tonry, L. Denneau, H. Weiland, R. Siverd (IfA, University of Hawaii), N. Erasmus, W. Koorts (South African Astronomical Observatory), A. Jordan, V. Suc (UAI, Obstech), S. J. Smartt, K. W. Smith (Oxford/QUB), D. R. Young, M. Nicholl, M. Fulton, M. McCollum, T. Moore, J. Weston, X. Sheng, C. R. Angus, A. Wilson, A. Aamer, D. Magill (QUB), P. Ramsden (Birmingham/QUB), L. Shingles (GSI/QUB), S. Srivastav, J. H. Gillanders, H. Stevance, A. J. Cooper, F. Stoppa, J. Tweddle (Oxford), L. Rhodes (TSI/McGill), A. Rest (STScI), T.-W. Chen (NCU), C. Stubbs (Harvard), J. S. Sommer (LMU), B. P. Schmidt (ANU), C. Kukuckova, N. Keenan (Belfast High School), E. Boyd (Glenlola Collegiate)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌AT_2025ocg - 2025-07-19 05:13:12 ESO-NTT / EFOSC2-NTT (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),

Light curves

 ▌GOTO-S_GOTO-4_L
 ▌ATLAS-CHL_ATLAS-04_orange
 ▌ATLAS-STH_ATLAS-03_orange
 ▌BG4_BlackGEM-Cam4_BG-q
   
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
21580 2025-07-19 05:13:12 ESO-NTT / EFOSC2-NTT 1500 G. Csoernyei G. Csoernyei None tns_2025ocg_2025-07-19_05-13-11.643_ESO-NTT_EFOSC2-NTT_None.asci tns_2025ocg_2025-07-19_05-13-11.643_ESO-NTT_EFOSC2-NTT_None.fits Object Quick-reduction spectrum
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-S_GOTO-4 2025-06-15 16:19:59 - 2025-06-20 16:42:24 2460842.180545 - 2460847.196114 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496969 2025-06-20 16:42:24 2460847.196114 19.4 0.13 ABMag L-GOTO GOTO-S_GOTO-4 180
496968 2025-06-15 16:19:59 2460842.180545 19.1 ABMag L-GOTO GOTO-S_GOTO-4 180 [Last non detection]
orange-ATLAS ATLAS-CHL_ATLAS-04 2025-06-18 08:51:13 - 2025-06-18 08:51:13 2460844.8689 - 2460844.8689 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496528 2025-06-18 08:51:13 2460844.8689 18.571 0.168 18.76 ABMag orange-ATLAS ATLAS-CHL_ATLAS-04 30 Robot
orange-ATLAS ATLAS-STH_ATLAS-03 2025-06-15 02:32:46 - 2025-06-15 02:32:46 2460841.60609 - 2460841.60609 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496527 2025-06-15 02:32:46 2460841.60609 18.6 ABMag orange-ATLAS ATLAS-STH_ATLAS-03 30 Robot [Last non detection]
BG-q-BlackGem BG4_BlackGEM-Cam4 2025-06-11 10:04:40 - 2025-06-20 09:52:19 2460837.9199074 - 2460846.911331 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
496730 2025-06-20 09:52:19 2460846.911331 19.17 0.11 20.43 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic
496729 2025-06-11 10:04:40 2460837.9199074 19.6 ABMag BG-q-BlackGem BG4_BlackGEM-Cam4 60 robotic [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
259464 2025-06-20 22:23:25 GOTO_bot A. Kumar, D. O'Neill, K. Ackley et al. GOTO GOTO 00:35:15.709 -44:04:47.92 2025-06-20 16:42:23.904 19.4 L-GOTO Other GOTO25dwe GOTO N
259303 2025-06-20 11:30:02 BlackGEM_Bot1 F. Stoppa, H. Tranin, D. Pieterse et al. BlackGEM BlackGEM 00:35:15.726 -44:04:47.98 2025-06-20 09:52:19.000 19.17 BG-q-BlackGem PSN BGEM J003515.72-440447.9 BlackGEM N
259213 2025-06-19 20:05:06 ATLAS_Bot1 J. Tonry, L. Denneau, H. Weiland et al. ATLAS ATLAS 00:35:15.754 -44:04:47.80 2025-06-18 08:51:12.960 18.571 orange-ATLAS PSN ATLAS25ghg ATLAS 2025TNSTR2285....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
21580 2025-07-19 23:49:19 Geza Csornyei NTT spectroscopic classifications of optical transients during the ESO Summer Research Programme None Varstar 0 1 The spectrum shows clear 4000 AA break at z = 0. The spectrum also shows a narrow Halpha emission line due to background galaxy contamination, at a redshift of z = 0.025. 2025TNSCR2778....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
21580 2025-07-19 05:13:12 ESO-NTT / EFOSC2-NTT 1500 G. Csoernyei G. Csoernyei None tns_2025ocg_2025-07-19_05-13-11.643_ESO-NTT_EFOSC2-NTT_None.asci tns_2025ocg_2025-07-19_05-13-11.643_ESO-NTT_EFOSC2-NTT_None.fits Object Quick-reduction spectrum

Comments

TNS
System

Fri, 06/20/2025 - 11:30

Object coordinates updated

Object coordinates updated according to AT-report 259303 of Group BlackGEM
Previous RA, DEC: 00:35:15.754, -44:04:47.80 (8.815642, -44.079944)
Updated RA, DEC: 00:35:15.726, -44:04:47.98 (8.815525, -44.079994)