1999MNRAS.306..809R

Query : 1999MNRAS.306..809R

1999MNRAS.306..809R - Mon. Not. R. Astron. Soc., 306, 809-814 (1999/July-2)

Simultaneous optical polarimetry and X-ray observations of the magnetic CV CP Tuc (AX J2315-592).

RAMSAY G., POTTER S.B., BUCKLEY D.A.H. and WHEATLEY P.J.

Abstract (from CDS):

CP Tuc (AX J2315-592) shows a dip in X-rays which lasts for approximately half the binary orbit and is deeper in soft X-rays compared with hard X-rays. It has been proposed that this dip is due to the accretion stream obscuring the accretion region from view. If CP Tuc were a polar, as has been suggested, then the length of such a dip would make it unique amongst polars since in those polars in which a dip is seen in hard X-rays the dip lasts for only 0.1 of the orbit. We present optical polarimetry and RXTE observations of CP Tuc which show circular polarization levels of ∼10 per cent and find evidence for only one photometric period. These data confirm CP Tuc as a polar. Our modelling of the polarization data implies that the X-ray dip is due to the bulk of the primary accretion region being self-eclipsed by the white dwarf. The energy dependence of the dip is due to a combination of this self-eclipse and also the presence of an X-ray temperature gradient over the primary accretion region.

Abstract Copyright: 1999 RAS

Journal keyword(s): binaries: eclipsing - stars: individual: CP Tuc (AX J2315-592) - stars: magnetic fields - novae, cataclysmic variables - stars: variables: other - X-rays: stars

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* CP Tuc	CV*	23 15 19.0034090472	-59 10 29.129147076						DA	45	0

Query : 1999MNRAS.306..809R

Basic data :

V* CP Tuc -- Cataclysmic Binary

X (AX,1eRASS,...), WD? (2018MNRAS), CV* (2012ApJ), V* (V*,[DWS97]), WD* (2024A&A), * (Gaia)

23 15 19.0034090472 -59 10 29.129147076 (Optical) [ 0.1239 0.1520 90 ] A 2020yCat.1350....0G

23 12 22.5901528394 -59 26 49.495400021 [ 0.1239 0.1520 90 ]

323.6788735741018 -53.9099373289559 [ 0.1239 0.1520 90 ]

17.762 -38.252 [0.148 0.197 90] A 2020yCat.1350....0G

4.9282 [0.1954] A 2020yCat.1350....0G

DA E 2024A&A...682A...5V

G 19.105951 [0.004396] C 2020yCat.1350....0G

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`AX J2315-592`	`2XMM J231519.0-591029`	`[DWS97] Tuc 2`
`1eRASS J231519.5-591027`	`3XMM J231518.9-591029`	`Gaia DR2 6492236727426610304`
*`V CP Tuc`**	`XSS J23115-5922`	`Gaia DR3 6492236727426610304`

References (45 between 1850 and 2026) (Total 45)
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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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* CP Tuc

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V* CP Tuc Gaia DR2 6492236727426610304 Gaia DR3 6492236727426610304

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