TNS Classification Report No. 21845 [ 2025TNSCR3326....1P ]
Date Received (UTC): 2025-08-22 12:49:56 Sender: Miika Pursiainen
Group: GOTO
M. Pursiainen, D. O'Neill, J. Lyman, P. Charalampopoulos, G. Ramsay, B. Warwick, K. Ackley, M. Dyer, F. Jiménez-Ibarra, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, L. Nuttall, E. Pallé, D. Pollacco, T. Killestein, A. Kumar on behalf of GOTO collaboration report/s a classification of object: SN 2025ugl
Type: SN
Remarks: Spectrum shows blue continuum with shallow, broad P-Cygni lines. Due to the relatively low SNR of the spectrum, the classification is not immediately obvious even if SN-nature is likely due to the off-nuclear host association with extended, blue galaxy at an unknown redshift. We find reasonable template matches with e.g. pre-peak Type IIb SNe (z~0.14), SLSN 2015bn near-peak (z~0.17) and SLSN-I PTF10aagc (z~0.035), and the breadth of the matched SN types and redshifts underlines the difficulties in determining the exact type. Further follow-up is encouraged.
The following Classification spectrum was provided:
Obsdate: 2025-08-22 05:36:23
Instrument: SPRAT
Telescope: Liverpool Telescope
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2025ugl
Date Received (UTC): 2025-08-22 12:49:56 Sender: Miika Pursiainen
Group: GOTO
M. Pursiainen, D. O'Neill, J. Lyman, P. Charalampopoulos, G. Ramsay, B. Warwick, K. Ackley, M. Dyer, F. Jiménez-Ibarra, K. Ulaczyk, D. Steeghs, D. Galloway, V. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. Breton, L. Nuttall, E. Pallé, D. Pollacco, T. Killestein, A. Kumar on behalf of GOTO collaboration report/s a classification of object: SN 2025ugl
Type: SN
Remarks: Spectrum shows blue continuum with shallow, broad P-Cygni lines. Due to the relatively low SNR of the spectrum, the classification is not immediately obvious even if SN-nature is likely due to the off-nuclear host association with extended, blue galaxy at an unknown redshift. We find reasonable template matches with e.g. pre-peak Type IIb SNe (z~0.14), SLSN 2015bn near-peak (z~0.17) and SLSN-I PTF10aagc (z~0.035), and the breadth of the matched SN types and redshifts underlines the difficulties in determining the exact type. Further follow-up is encouraged.
The following Classification spectrum was provided:
Obsdate: 2025-08-22 05:36:23
Instrument: SPRAT
Telescope: Liverpool Telescope
Details of the object and its spectra can be viewed here: https://www.wis-tns.org/object/2025ugl