Multi-band behaviour of the TeV blazar PG 1553+113 in optical range on diverse timescales - Flux and spectral variations

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Table 5.

Summary of the periods found in the historical VR-band LCs of PG 1553+113.

Passband	Method	Period
		[day]
V-band	Sine wave fit	807 ± 20
	LSP	803 ± 70
	`REDFIT`	772 ± 85
	LSP	208 ± 6 ^(a)
	`REDFIT`^(b)	211 ± 10 ^(a)

R-band	Sine wave fit	812 ± 30
	LSP	801 ± 62
	`REDFIT`	817 ± 107
	`REDFIT`	248 ± 12
	LSP	212 ± 6 ^(a)
	`REDFIT`	210 ± 8 ^(a)

Notes. The methods used are also listed.

^(a)

These periods refer to the LCs corrected for the long-term variations.

^(b)

V power spectrum is inconsistent with the AR1 model.

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