apereyra@igp.gob.pe
ATel #17342; A. Pereyra (Geophysical Institute of Peru, Astronomy Area), M. Zevallos (National University of Engineering - UNI, Peru), J. Tello (UNI), D. Alvarado (UNI), J. Delgado (UNI)
on 19 Aug 2025; 19:44 UT
Credential Certification: Antonio Pereyra (apereyra@igp.gob.pe)
Subjects: Optical, Supernovae, Transient
We report photometric observations of Type Ia supernovae SN 2025plf (TNSTR-2025-2485, TNSCR-2025-2528) and SN 2025rbs (TNSTR-2025-2688, TNSCR-2025-2699), obtained with the OAUNI 51cm telescope (arXiv:1512.03104) at Huancayo Observatory, Peru. CCD imaging was carried out in R filter on 2025-07-25 (UT) under non-photometric conditions, with airmasses lower than 1.5. The integration times were 60x20s=1200s for SN 2025plf and 45x20s=900s for SN 2025rbs. Our measurements yielded:
| SN |
Date (UT) |
filter |
seeing (") |
mag |
| 2025plf |
2025-07-25.261 |
R |
1.9 |
15.61 +/- 0.11 |
| 2025rbs |
2025-07-25.281 |
R |
2.0 |
12.19 +/- 0.01 |
Zero-point calibration in both cases was performed using UCAC4 field stars. The observations were gathered ~25 days after the discovery of SN 2025plf and ~11 days after that of SN 2025rbs. The OAUNI project is supported by UNI, TWAS, IGP, and ProCiencia-Concytec (Convenio 133-2020 Fondecyt).
