RA/DEC (2000)
22:41:37.127 -03:10:37.95
340.4046945 -3.1772087
Type
SLSN-I
Redshift
0.09
Discovery ReportClassification Report
Reporting Group
ATLAS
Discovering Data Source
ATLAS
Discovery Date
2025-04-27 14:31:10.272
TNS AT
Y
Public
Y
Discovery Mag
16.417
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)
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025imr - 2025-05-15 05:10:53 LT / SPRAT (GOTO)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),0 (observed)

Light curves

 ▌GOTO-N_GOTO-2_L
 ▌P48_ZTF-Cam_r
 ▌ATLAS-HKO_ATLAS-02_orange
   
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
21045 2025-05-15 05:10:53 LT / SPRAT Robotic GOTO tns_2025imr_2025-05-15_05-10-52.550_LT_SPRAT_GOTO.dat Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2024-12-18 20:00:31 - 2025-05-12 04:55:25 2460663.333687 - 2460807.705149 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
487881 2025-05-12 04:55:25 2460807.705149 16.78 0.06 ABMag L-GOTO GOTO-N_GOTO-2 180
487880 2024-12-18 20:00:31 2460663.333687 19.5 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
r-ZTF P48_ZTF-Cam 2025-05-08 11:20:20 - 2025-05-10 11:29:44 2460803.9724537 - 2460805.9789815 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
487778 2025-05-10 11:29:44 2460805.9789815 16.5673 0.0347976 ABMag r-ZTF P48_ZTF-Cam
487777 2025-05-08 11:20:20 2460803.9724537 16.5969 0.029214 ABMag r-ZTF P48_ZTF-Cam
orange-ATLAS ATLAS-HKO_ATLAS-02 2025-01-13 05:46:46 - 2025-04-27 14:31:10 2460688.74081 - 2460793.10498 2
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
484455 2025-04-27 14:31:10 2460793.10498 16.417 0.026 18.74 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 Robot
484454 2025-01-13 05:46:46 2460688.74081 17.54 ABMag orange-ATLAS ATLAS-HKO_ATLAS-02 30 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
254798 2025-05-12 06:50:27 GOTO_bot A. Kumar,G. Ramsay,K. Ackley et al. GOTO GOTO 22:41:37.128 -03:10:37.95 2025-05-12 04:55:24.960 16.78 L-GOTO Other GOTO25ckd GOTO N
254742 2025-05-10 17:41:50 Fritz Jacob Wise (LJMU),Christoffer Fremling (Caltech),Daniel Perley (LJMU) et al. ZTF ZTF 22:41:37.127 -03:10:37.95 2025-05-08 11:20:19.999 16.5969 r-ZTF PSN ZTF25aapsdaj ZTF N
252809 2025-04-27 19:54:52 ATLAS_Bot1 J. Tonry,L. Denneau,H. Weiland et al. ATLAS ATLAS 22:41:37.128 -03:10:37.94 2025-04-27 14:31:10.272 16.417 orange-ATLAS PSN ATLAS25ehu ATLAS 2025TNSTR1548....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
21045 2025-05-15 08:13:47 Miika Pursiainen M. Pursiainen, J. Lyman, D. O'Neill, T. Killestein, B. Warwick, K. Ackley, M. Dyer, F. Jiménez-Ibarra, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, L. Nuttall, E. Pallé, D. Pollacco, A. Kumar on behalf of GOTO collaboration GOTO SLSN-I 0.09 1 Add GOTO Spectrum is consistent with Type I SLSNe at redshift of about 0.09 to 0.1 (based on template matching). In the absence of any obvious host lines, we conservatively assume z=0.09. At the redshift the SN is brighter than -21.5 mag as expected for a SLSN. Further, the host galaxy appears to be a typical for SLSNe-I (i.e. blue and small) in Legacy Survey. As such, we classify the event as SLSN-I. 2025TNSCR1797....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
21045 2025-05-15 05:10:53 LT / SPRAT Robotic GOTO tns_2025imr_2025-05-15_05-10-52.550_LT_SPRAT_GOTO.dat Object

Comments

TNS
System

Sat, 05/10/2025 - 17:41

Object coordinates updated

Object coordinates updated according to AT-report 254742 of Group ZTF
Previous RA, DEC: 22:41:37.128, -03:10:37.94 (340.404698889, -3.17720444444)
Updated RA, DEC: 22:41:37.127, -03:10:37.95 (340.4046945, -3.1772087)