J/other/BASI/39.259 WX Pyx J-band light curve (Joshi+, 2011)
A study of the near-infrared modulation at spin and orbital periods in the
intermediate polar WX Pyx.
Joshi V.H., Ashok N.M., Banerjee D.P.K.
<Bull. Astron. Soc. India, 39, 259-275 (2011)>
=2011BASI...39..259J 2011BASI...39..259J
ADC_Keywords: Binaries, cataclysmic ; Photometry, infrared
Keywords: stars: individual: WX Pyx - novae, cataclysmic variables
Abstract:
We present near-infrared J-band photometric observations of the
intermediate polar WX Pyx. The frequency analysis indicates the
presence of a period at 1559.2±0.2s which is attributed to the spin
period of the white dwarf. The spin period inferred from the infrared
data closely matches that determined from X-ray and optical
observations. WX Pyx is a system whose orbital period has not been
measured directly and which is not too well constrained. From the IR
observations, a likely peak at 5.30±0.02h is seen in the power
spectrum of the object. It is suggested that this corresponds to the
orbital period of the system. In case this is indeed the true orbital
period, some of the system physical parameters may be estimated. Our
analysis indicates that the secondary star is of M2 spectral type and
the distance to the object is 1.53kpc. An upper limit of 30 for the
angle of inclination of the system is suggested. The mass transfer
rate and the magnetic moment of the white dwarf are estimated to be
(0.95-1.6)x10-9M_☉/yr and (1.9-2.4)x1033G*cm3 respectively.
Description:
Near infrared J band photometry of WX Pyx was done using the Mt.Abu
1.2-m telescope. The object was observed for a total duration of 22 hr
spanning six nights from December 2007 to February 2010.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
08 33 05.77 -22 48 31.9 WX Pyx = 2 Pyx
---------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 25 369 J band photometric data of WX Pyx
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.4 d HJD Heliocentric Julian date
14- 18 F5.2 mag Jmag J magnitude
20- 23 F4.2 mag e_Jmag rms uncertainty on Jmag
25 I1 --- Obs [1/6] Observation number (1)
--------------------------------------------------------------------------------
Note (1): observation period in table1:
1 = 2007-12-18, 10 cycles
2 = 2007-12-19, 9 cycles
3 = 2008-01-18, 7.5 cycles
4 = 2008-03-18, 9.5 cycles
5 = 2009-03-19, 9.5 cycles
6 = 2010-02-22, 5 cycles
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Mar-2015