Dice Question Streamline Icon: https://streamlinehq.com

Resolve the intra-segment temporal structure of flare F1 in HD 283572

Characterize the underlying sub-minute temporal variability during the 3-minute flare segment T3:S13 (event F1) observed from HD 283572, to ascertain whether the majority of the emission arose from two 29.7-second spikes or from additional unresolved variability within the segment.

Information Square Streamline Icon: https://streamlinehq.com

Background

During track T3, HD 283572 exhibited a strong flare (event F1) within segment T3:S13. Imaging each 29.7-second integration showed two prominent peaks (F1A and F1B at 25.0 ± 3.8 mJy and 23.0 ± 4.8 mJy), while other integrations in the segment were less significant (~11.5 ± 2.3 mJy).

Although these results suggest most of the 3-minute averaged flux might be due to two short spikes, the authors state the dataset does not allow determination of the true temporal behavior within F1, leaving the fine time structure unresolved.

References

Whilst these results may suggest that the majority of the observed flux over the 3\,min cadence T3:S13 arose from just two 29.7\,sec integrations, our data are unable to determine the underlying variability during F1.

— SMA detection of an extreme millimeter flare from the young class III star HD 283572 (2402.01833 - Lovell et al., 2 Feb 2024) in Section 2.2.2 (Per-scan variability)