2025RNAAS...9..156K

Query : 2025RNAAS...9..156K

2025RNAAS...9..156K - Research Notes of the AAS, 9, 156 (2025/July-0)

Seeing-correlated Variability in ZTF Light Curves.

KRUSHINSKY V.V., PRUZHINSKAYA M.V., SEMENIKHIN T.A. (The SNAD Team)

Abstract (from CDS):

We report on spurious quasi-periodic variability detected in high-cadence Zwicky Transient Facility (ZTF) Data Release 23 light curves from Field 840, observed on the night of 2024 January 9. The apparent flux variations correlate strongly with the seeing full width at half maximum. This effect can occur even in galaxies that appear point-like at ZTF resolution, making them difficult to distinguish from true astrophysical variability. This highlights the importance of careful inspection of image metadata when interpreting short-term variability in time-domain surveys.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Time domain astronomy - Supernovae - Time series analysis - Transient detection

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2020uzv SN* 07 57 07.357 +70 50 57.62           SNIa 2 0
2 SN 2021jka SN* 08 02 27.170 +70 27 24.91           SNIa 1 0

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