Second Timescale Photometry of the Very Fast Nova V1674 Her with Palomar Gattini-IR

Creators: Hansen, Kylie Y.; De, Kishalay; Ashley, Michael C. B.; Kasliwal, Mansi M.; Delacroix, Alexander; Greffe, Tim; Hale, David; Hankins, Matthew J.; Lau, Ryan; Li, Chengkui; McKenna, Daniel; Moore, Anna M.; Ofek, Eran O.; Smith, Roger M.; Soon, Jamie; Soria, Roberto; Srinivasaragavan, Gokul P.; Travouillon, Tony

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Abstract

We report second-timescale infrared photometry of the nova V1674 Her using Palomar Gattini-IR (PGIR). These observations constitute the first infrared and highest temporal resolution data (resolution of ≈0.84 s) of the nova reported to date. PGIR observed in this fast readout mode for more than an hour on three nights between 3 and 6 days after discovery. We searched for periodic variability using a Lomb–Scargle periodogram and did not detect anything down to a three sigma upper limit of 0.093 mag. This suggests that the periodic variability detected in the nova by Patterson et al. was lower by at least a factor of about 1.65 in the first week of the eruption.

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© 2021. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received October 2021; Revised October 2021; Accepted October 2021; Published October 2021.

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