RA/DEC (2000)
10:38:32.501 +19:25:03.09
159.635421 +19.417524
Type
SN Ia
Redshift
0.169
Discovery ReportClassification Report
Reporting Group
GOTO
Discovering Data Source
GOTO
Discovery Date
2025-05-15 21:29:11.328
TNS AT
Y
Public
Y
Discovery Mag
20.17
Filter
L-GOTO
Reporter/s
B. Gompertz, K. Ackley, M. Dyer, J. Lyman, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. Breton, J. Casares, L. Nuttall, B. Godson, T. Killestein, A. Kumar, D. O'Neill, M. Pursiainen, on behalf of GOTO collaboration
NEDSIMBADDECaLSPanSTARRS-1SkyMapperVizieRWISEDSSADS

Spectra

 ▌SN_2025kmd - 2025-05-16 23:44:29 NOT / ALFOSC (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),0 (observed)

Light curves

 ▌GOTO-N_GOTO-2_L
 ▌GOTO-N_GOTO-1_L
   
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
21081 2025-05-16 23:44:29 NOT / ALFOSC 2400 R. Rautio (Univ. Oulu) Z. P. Zhu (NAOC), L. Izzo (INAF/OACN and DARK/NBI) None tns_2025kmd_2025-05-16_23-44-29_NOT_ALFOSC_None.txt Object
Light Curves
Filter Tel / Inst Obs-date range JD Range Photometry
L-GOTO GOTO-N_GOTO-2 2025-05-08 21:32:14 - 2025-05-08 21:32:14 2460804.397391 - 2460804.397391 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488455 2025-05-08 21:32:14 2460804.397391 18 ABMag L-GOTO GOTO-N_GOTO-2 180 [Last non detection]
L-GOTO GOTO-N_GOTO-1 2025-05-15 21:29:11 - 2025-05-15 21:29:11 2460811.395271 - 2460811.395271 1
Photometry
ID Obs-date JD Mag. / Flux Err Lim. Mag./Flux Units Filter Tel / Inst Exp-time Observer/s Remarks
488456 2025-05-15 21:29:11 2460811.395271 20.17 0.21 ABMag L-GOTO GOTO-N_GOTO-1 360
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
255110 2025-05-16 10:37:51 GOTO_bot B. Gompertz, K. Ackley, M. Dyer et al. GOTO GOTO 10:38:32.501 +19:25:03.09 2025-05-15 21:29:11.328 20.17 L-GOTO Other GOTO25cqo GOTO 2025TNSTR1805....1G N
Classification Reports
ID Time received (UT) Sender Classifier/s Group Classification Redshift Spectra Related files Assoc. Groups End prop. period Remarks ADS Bibcode
21081 2025-05-21 10:43:36 Antonio Martin-Carrillo L. Izzo (INAF/OACN and DARK/NBI), A. Martin-Carrillo (UCD), Z. P. Zhu (NAOC), D. B. Malesani (DAWN/NBI and Radboud), B. P. Gompertz (U. Birmingham), G. Corcoran (UCD), N. R. Tanvir (Leicester), R. Rautio (Univ. Oulu) None SN Ia 0.169 1 Using SNID, the spectrum matches well several normal rising type-Ia supernovae at z = 0.18 +/- 0.01, 7 days before peak. The slit in our observation was oriented to cover as well the bright galaxy 5.3” NW of this source. We detect several emission lines which we identify Halpha, Hbeta, [O III] and [O II] at a common redshift of z = 0.169. With a 15 kpc projected separation, this galaxy is thus a plausible host of AT 2025kmd/GOTO25cqo. 2025TNSCR1882....1I
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
21081 2025-05-16 23:44:29 NOT / ALFOSC 2400 R. Rautio (Univ. Oulu) Z. P. Zhu (NAOC), L. Izzo (INAF/OACN and DARK/NBI) None tns_2025kmd_2025-05-16_23-44-29_NOT_ALFOSC_None.txt Object

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