TNS Classification Report No. 20468 [ 2025TNSCR.804....1G ]
Date Received (UTC): 2025-02-25 17:27:44 Sender: Anjasha Gangopadhyay
Group: ZTF
Anjasha Gangopadhyay, Jesper Sollerman, Ariel Goobar, Avinash Singh (OKC,SU), Steve Schulze (NorthWestern), Yuhan Yao (UC Berkeley) report/s a classification of object: SN 2025bpq
Type: SN IInRedshift: 0.0637
Remarks: We classify SN2025bpq as a type IIn SN based on the spectrum taken with NOT on 2025-02-24 (gr4, 40 mins). The SN shows flash ionized signatures of C III/N III around 4700 Angstrom along with intermediate width H$\alpha$ and H$\beta$ emission signatures (FWHM ~ 1300 km/sec). The redshift estimated from the host galaxy lines of ZTF25aafofmu is 0.0637. NGSF (AstroNote 2022-191; Howell et al. 2005) also shows a best match with SN IIn/II-flash. The line width is narrower than typical TDEs and rise time is also quite fast at the given absolute magnitude which rules out the TDE scenario.
The following Classification spectrum was provided:
Obsdate: 2025-02-24 00:00:00
Instrument: ALFOSC
Telescope: Nordic Optical Telescope
Remarks: The redshift is calculated from the host galaxy lines.
Details of the object and its spectra can be viewed here: https://sandbox.wis-tns.org/object/2025bpq
Date Received (UTC): 2025-02-25 17:27:44 Sender: Anjasha Gangopadhyay
Group: ZTF
Anjasha Gangopadhyay, Jesper Sollerman, Ariel Goobar, Avinash Singh (OKC,SU), Steve Schulze (NorthWestern), Yuhan Yao (UC Berkeley) report/s a classification of object: SN 2025bpq
Type: SN IInRedshift: 0.0637
Remarks: We classify SN2025bpq as a type IIn SN based on the spectrum taken with NOT on 2025-02-24 (gr4, 40 mins). The SN shows flash ionized signatures of C III/N III around 4700 Angstrom along with intermediate width H$\alpha$ and H$\beta$ emission signatures (FWHM ~ 1300 km/sec). The redshift estimated from the host galaxy lines of ZTF25aafofmu is 0.0637. NGSF (AstroNote 2022-191; Howell et al. 2005) also shows a best match with SN IIn/II-flash. The line width is narrower than typical TDEs and rise time is also quite fast at the given absolute magnitude which rules out the TDE scenario.
The following Classification spectrum was provided:
Obsdate: 2025-02-24 00:00:00
Instrument: ALFOSC
Telescope: Nordic Optical Telescope
Remarks: The redshift is calculated from the host galaxy lines.
Details of the object and its spectra can be viewed here: https://sandbox.wis-tns.org/object/2025bpq