BG Canis Minoris = 3A0729+103

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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BG Canis Minoris = 3A0729+103

A finding chart for BG CMi

SkyView image of BG CMi (see important notes)

Position:

Position
- Equatorial: 07^h31^m29.04^s, +09^d56^m21.8^s (J2000)
- Galactic: l=208.48, b=+13.36
Finding Chart:
McHardy et al. (1984)
Brigntness:
Optical ; fx (2-10 keV)~2.3x10^(-11) ergs/cm/cm/s (ASCA)
Periods:
- Orbital: 0.1347486 d = 3.234864 hr = 11645.51 s, see in optical and X-rays
  HJD(Eclipse) = 2445020.396(2)=0.13474854(10)E
  (Hellier 1997a; see, however, Kim et al. 2005)
- Spin (?): 0.010573 d = 15.225 min = 913.5 s, seen in optical photometry, optical spectroscopy and X-rays.
  HJD(max) = 2445020.27999(33)+0.010572993(4)E-3.86(9)x10^(-13)E^2
  (Hellier 1997a; see, however Kim et al. 2005)
- Others: positive sideband in X-rays; 1083s in optical.
Inclination:
~65 deg? (has grazing eclipse)
Distance:
?

BG CMi has a very strong orbital X-ray modulation, and probably has a grazing eclipse in the optical. Perhaps one of its most important feature is that optical and IR polarization have been detected in this system; inferred magnetic field is ? Also, there has been some controversy over whether the 913.5s period really is the white dwarf spin period or not.