Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.23416 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918265348947968 |
|---|---|
| author | Mondal, Sandeep Kumar Kishore, Shubham Gupta, Alok C. Giacinti, Gwenael |
| author_facet | Mondal, Sandeep Kumar Kishore, Shubham Gupta, Alok C. Giacinti, Gwenael |
| contents | In this work, we report evidence suggesting the potential future detection of a month-scale quasi-periodic oscillation (QPO) in the gamma-ray light curve of OP 313. We analysed almost 16.8 years of Fermi-LAT gamma-ray data and applied the Bayesian block method to the monthly-binned light curve. We identified four high-flux states and investigated the possibility of a QPO in the fourth high-flux state (MJD 59482-60832). Using the Weighted Wavelet Z-transform (WWZ) and Lomb-Scargle Periodogram (LSP) methods, we find tentative evidence for a month-scale QPO; however, its detection significance is limited by the small number of observed cycles. With a sufficiently long data set, the QPO may be detected with higher significance in the future. We further explored possible physical origins of this potential QPO and examined several models. We found that a curved-jet model can explain the observed behaviour. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_23416 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Possibility of Month-scale Quasi-periodic Oscillations in the Gamma-ray Light Curve of OP 313 Mondal, Sandeep Kumar Kishore, Shubham Gupta, Alok C. Giacinti, Gwenael High Energy Astrophysical Phenomena In this work, we report evidence suggesting the potential future detection of a month-scale quasi-periodic oscillation (QPO) in the gamma-ray light curve of OP 313. We analysed almost 16.8 years of Fermi-LAT gamma-ray data and applied the Bayesian block method to the monthly-binned light curve. We identified four high-flux states and investigated the possibility of a QPO in the fourth high-flux state (MJD 59482-60832). Using the Weighted Wavelet Z-transform (WWZ) and Lomb-Scargle Periodogram (LSP) methods, we find tentative evidence for a month-scale QPO; however, its detection significance is limited by the small number of observed cycles. With a sufficiently long data set, the QPO may be detected with higher significance in the future. We further explored possible physical origins of this potential QPO and examined several models. We found that a curved-jet model can explain the observed behaviour. |
| title | Possibility of Month-scale Quasi-periodic Oscillations in the Gamma-ray Light Curve of OP 313 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.23416 |