2021JAVSO..49...19K

Query : 2021JAVSO..49...19K

2021JAVSO..49...19K - J. Am. Assoc. Variable star obs., 49, 19 (2021)

An Update on the Periods and Period Changes of the Blazhko RR Lyrae Star XZ Cygni.

KANESHIRO D., SMITH H.A. and SAMOLYK G.

Abstract (from CDS):

XZ Cygni is an RR Lyrae variable that underwent relatively large changes in its primary and Blazhko periods during the 20th century. Here we use AAVSO photometry obtained between 2001 and 2019 to extend previous studies of this star. Whereas XZ Cygni's fundamental mode and Blazhko periods changed dramatically between 1965 and 1979, those periods have been more stable since the 1980s, although the fundamental period has not been entirely constant. We compare the period change behavior of XZ Cygni with theoretical predictions of period change.

Abstract Copyright: ∼

Journal keyword(s):

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 1

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Number of rows : 1

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	V* XZ Cyg	RR*	19 32 29.3050827744	+56 23 17.494181700		9.94	9.68			kA1.5hA8	268	0

Query : 2021JAVSO..49...19K

Basic data :

V* XZ Cyg -- RR Lyrae Variable

* (HD,AG,...), RR* (2006AJ), V* (AN,V*), RR? (2018yCat), PM* (2018yCat), NIR (2MASS)

19 32 29.3050827744 +56 23 17.494181700 (Optical) [ 0.0135 0.0147 90 ] A 2020yCat.1350....0G

19 31 27.3426204934 +56 16 47.279382207 [ 0.0135 0.0147 90 ]

088.2149481770905 +16.9761297303069 [ 0.0135 0.0147 90 ]

85.059 -24.226 [0.018 0.017 90] A 2020yCat.1350....0G

V(km/s) -160.00 [1.78] / z(~) -0.000534 [0.000006] / cz -159.96 [1.78] B 2007AN....328..889K

1.5864 [0.0147] A 2020yCat.1350....0G

kA1.5hA8 D 1994ApJS...93..271S

B 9.94 [0.03] D 2000A&A...355L..27H

V 9.68 [0.03] D 2000A&A...355L..27H

G 9.913754 [0.006490] C 2020yCat.1350....0G

J 9.17 [0.04] C 2003yCat.2246....0C

H 8.96 [0.03] C 2003yCat.2246....0C

K 8.884 [0.019] C 2003yCat.2246....0C

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`HD 239124`	`HIC 96112`	`SAO 31761`	`WEB 16835`
`AG+56 1263`	`HIP 96112`	*`SV HV 2973`**	`YZ 56 10573`
`AN 76.1905`	`2MASS J19322930+5623174`	`TIC 267808239`	`Gaia DR2 2142052889490819328`
`BD+56 2257`	`NSVS 3078093`	`TYC 3929-1961-1`	`Gaia DR3 2142052889490819328`
`GCRV 11964`	`PLX 4587`	`UCAC3 293-139097`	`Gaia DR1 2142052885197472000`
`GEN# +1.00239124`	`PLX 4587.00`	`uvby98 100239124`
`GSC 03929-01961`	`PPM 37515`	*`V XZ Cyg`**

References (268 between 1850 and 2026) (Total 268)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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`HD 239124`	`AG+56 1263`	`BD+56 2257`	`GSC 03929-01961`	`HIC 96112`
`HIP 96112`	`2MASS J19322930+5623174`	`PLX 4587`	`PPM 37515`	`SAO 31761`
`TYC 3929-1961-1`	`UCAC3 293-139097`	`uvby98 100239124`	*`V XZ Cyg`**	`Gaia DR2 2142052889490819328`
`Gaia DR3 2142052889490819328`	`Gaia DR1 2142052885197472000`

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