TV Columbae = A0526-328

IPs

AE Aqr
FO Aqr
XY Ari
V405 Aur
HT Cam
MU Cam
DW Cnc
BG CMi
V709 Cas
V1025 Cen
TV Col
TX Col
UU Col
V2306 Cyg
YY Dra
PQ Gem
DQ Her
EX Hya
NY Lup
V2400 Oph
GK Per
AO Psc
WX Pyx
V1223 Sgr
V1062 Tau
RX J2133

Candidates

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TV Columbae = A0526-328

A finding chart for TV Col

SkyView image of TV Col (see important notes); the IP is the SE component of the close pair.

Position:

Equatorial: 05^h29^m25.53^s, -32^d49^m05.3^s (J2000)
Galactic: l=236.79, b=-30.60

Finding Chart:

Charles et al (1979)

Brightness:

B~13.6-(14.5; fx (2-10 keV)~5.4x10^(-11) ergs/cm/cm/s (ASCA)

Periods:

Orbital: 0.2286 d = 5.4864 hr = 19751.03 s, from partial eclipes in the optical
HJD(eclipse) = 2448267.4893(5) + 0.2285999(2)E
(Hellier 1993a)
Spin: ~0.02212 d = 31.85 min = 1911 s, rarely seen in the optical?
Ephemeris?
Others: 5.2 hr photometric period and 4-day beat between orbit and 5.2hr.

Inclination:

~70 (has grazing eclipse).

Distance:

368-15+17 pc (McArthur et al 2001)

A typically atypical prototype: TV Col helped establish the searchlight model (irradiation of the secondary or the hotspot) of the beat frequency, but that involved a 5.2 hr spin period, 5.5 hr orbital period, and the 4 day beat. The 5.2 hr/4 day `periods' are not truely stable, and are thought most likely to be an accretion disk precession phenomenon.