A Search for Minute-timescale Flares from the Transient AT 2024wpp

Abstract The AT 2018cow-like fast blue optical transient AT 2022tsd showed a large number of a few-minute-duration, high-luminosity (∼10 43 erg s −1 ) flares. We present an intensive search for such flares from another 18cow-like event, AT 2024wpp. We have used the Large Array Survey Telescope to observe this transient between 28 and 74 days after the approximate time of zero flux. The target was observed for about 23 hr to a sensitivity that allows one to detect 3 × 10 42 erg s −1 flares at a signal-to-noise ratio ≳ 5. No optical flares have been found, suggesting a one-sided 2 σ confidence upper limit of <0.02 on the flare’s duty cycle, and flare rate lower than about 0.11 hr −1 . 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 toward the central emitting region did not fall below unity during the particular search window.

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Publication Details

Journal
The Astrophysical Journal
Published
2025-10-24
DOI
https://doi.org/10.3847/1538-4357/ae00c0
Citations
2
Primary Topic
Solar and Space Plasma Dynamics
Type
article
Field-Weighted Citation Impact
2.31
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article

A Search for Minute-timescale Flares from the Transient AT 2024wpp

Stanislav Fainer, Sarah Spitzer, Krzysztof A. Rybicki, E. Segrè et al.
2 citations
The Astrophysical Journal
Solar and Space Plasma Dynamics
2.31
article

A Search for Minute-timescale Flares from the Transient AT 2024wpp

Stanislav Fainer, Sarah Spitzer, Krzysztof A. Rybicki, E. Segrè, Arie Blumenzweig, Yossi Shvartzvald, Michael S. Engel, S. Garrappa, E. Zimmerman, A. Gal‐Yam, Yahel Sofer-Rimalt, O. Yaron, David Polishook, Ruslan Konno, Y. M. Shani, Anna Y. Q. Ho, E. O. Ofek, Ping Chen, Sagi Ben-Ami, Alexander Krassilchtchikov, Asaf Horowicz, Lior Ozer, Ron Arad, Nimrod Strasman
article en
2 citations

Abstract

Abstract The AT 2018cow-like fast blue optical transient AT 2022tsd showed a large number of a few-minute-duration, high-luminosity (∼10 43 erg s −1 ) flares. We present an intensive search for such flares from another 18cow-like event, AT 2024wpp. We have used the Large Array Survey Telescope to observe this transient between 28 and 74 days after the approximate time of zero flux. The target was observed for about 23 hr to a sensitivity that allows one to detect 3 × 10 42 erg s −1 flares at a signal-to-noise ratio ≳ 5. No optical flares have been found, suggesting a one-sided 2 σ confidence upper limit of <0.02 on the flare’s duty cycle, and flare rate lower than about 0.11 hr −1 . 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 toward the central emitting region did not fall below unity during the particular search window.

The Astrophysical JournalVol. 993(1)
Cornell University (US), Weizmann Institute of Science (IL)
Openalex Percentile: Top 10%
Solar and Space Plasma Dynamics
2.31
DOIOpen Access PDFOpenAlex
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