A search for minute-time-scale flares from the transient AT\,2024wpp
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| author | Ofek, Eran O. Ozer, Lior Konno, Ruslan Strasman, Nimrod Chen, Ping Ben-Ami, Sagi Polishook, David Krassilchtchikov, Alexander Garrappa, Simone Zimmermann, Erez A. Segre, Enrico Horowicz, Asaf Gal-Yam, Avishay Shani, Yarin M. Fainer, Stanislav Engel, Michael Sofer-Rimalt, Yahel Ho, Anna Y. Q. Shvartzvald, Yossi Yaron, Ofer Rybicki, Kris Blumenzweig, Arie Spitzer, Sarah Arad, Ron |
| author_facet | Ofek, Eran O. Ozer, Lior Konno, Ruslan Strasman, Nimrod Chen, Ping Ben-Ami, Sagi Polishook, David Krassilchtchikov, Alexander Garrappa, Simone Zimmermann, Erez A. Segre, Enrico Horowicz, Asaf Gal-Yam, Avishay Shani, Yarin M. Fainer, Stanislav Engel, Michael Sofer-Rimalt, Yahel Ho, Anna Y. Q. Shvartzvald, Yossi Yaron, Ofer Rybicki, Kris Blumenzweig, Arie Spitzer, Sarah Arad, Ron |
| contents | The AT 2018cow-like fast blue optical transient AT2022tsd showed a large number of few-minute-duration, high-luminosity (~10^43 erg/s) flares. We present an intensive search for such flares from another 18cow-like event, AT2024wpp. We have used the Large Array Survey Telescope (LAST) to observe this transient between 28 and 74 days after the approximate time of zero flux. The target was observed for about 23 hours to a sensitivity that allows one to detect 3x10^42 erg/s flares at S/N>5. No optical flares have been found, suggesting a one-sided 2-sigma confidence upper limit of <0.02 on the flare's duty cycle, and flare rate lower than about 0.11/hr. These limits suggest that not all 18cow-like objects display a high rate of minute-timescale luminous flares. This can be explained either by diversity in the 18cow-like population or by viewing angle effects (e.g., beaming), or rather that the optical depth towards the central emitting region did not fall below unity during the particular search window. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_18359 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A search for minute-time-scale flares from the transient AT\,2024wpp Ofek, Eran O. Ozer, Lior Konno, Ruslan Strasman, Nimrod Chen, Ping Ben-Ami, Sagi Polishook, David Krassilchtchikov, Alexander Garrappa, Simone Zimmermann, Erez A. Segre, Enrico Horowicz, Asaf Gal-Yam, Avishay Shani, Yarin M. Fainer, Stanislav Engel, Michael Sofer-Rimalt, Yahel Ho, Anna Y. Q. Shvartzvald, Yossi Yaron, Ofer Rybicki, Kris Blumenzweig, Arie Spitzer, Sarah Arad, Ron High Energy Astrophysical Phenomena The AT 2018cow-like fast blue optical transient AT2022tsd showed a large number of few-minute-duration, high-luminosity (~10^43 erg/s) flares. We present an intensive search for such flares from another 18cow-like event, AT2024wpp. We have used the Large Array Survey Telescope (LAST) to observe this transient between 28 and 74 days after the approximate time of zero flux. The target was observed for about 23 hours to a sensitivity that allows one to detect 3x10^42 erg/s flares at S/N>5. No optical flares have been found, suggesting a one-sided 2-sigma confidence upper limit of <0.02 on the flare's duty cycle, and flare rate lower than about 0.11/hr. These limits suggest that not all 18cow-like objects display a high rate of minute-timescale luminous flares. This can be explained either by diversity in the 18cow-like population or by viewing angle effects (e.g., beaming), or rather that the optical depth towards the central emitting region did not fall below unity during the particular search window. |
| title | A search for minute-time-scale flares from the transient AT\,2024wpp |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2508.18359 |