AO Piscium = H2252-035

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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AO Piscium = H2252-035

A finding chart for AO Psc

SkyView image of AO Psc (see important notes).

Position

Equatorial: 22^h55^m17.99^s, -03^d10^m40.0^s (J2000)
Galactic: l=68.67, b=-53.34

Finding Chart:

Griffiths et al (1980)

Brigntness:

Optical ; fx (2-10 keV)~4.1x10^(-11) ergs/cm/cm/s (ASCA)

Periods:

Orbital: 0.1496252 d = 3.591 hr = 12927.6 s, seen in optical and X-rays.
HJD (max) = 2444864.1428 (28) + 0.1496252 (5) E
(Kaluzny & Semeniuk 1988)
See the X-ray orbital modulations seen with ASCA.
Spin: 0.00932 d = 13.42 min = 805.2s, seen in X-ray and optical photometry.
HJD = 2444883.92074 (37) + 0.009319484 (4) E -2.87 (30) x 10^-13 E²
(Kaluzny & Semeniuk 1988) has now accumulated too much uncertainties to be useable.
See the X-ray spin profiles seen with ASCA.
Others: The 858.69 s sideband is more prominent than the spin period in the optical.
HJD = 2445174.18142 (16) + 0.009938493 (2) (4) E -3.87 (25) x 10^-13 E²
(Kaluzny & Semeniuk 1988)
See the X-ray beat pulses seen with ASCA.

Inclination:

~60 deg? (X-ray orbital dip, no eclipse).

Distance:

~400 pc?

In many ways, the architype of IPs: sinusoidal X-ray spin modulation, sideband is stronger in the optical than the spin, steady spin-up (although how closely has it been monitored of late?). Orbital modulation is modest in X-rays, but definitely due to absorption event; sinusoidal and prominent in the optical.