National Aeronautics and Space Administration

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
V2069 Cyg
V2306 Cyg
YY Dra
PQ Gem
DQ Her
EX Hya
NY Lup
V2400 Oph
GK Per
AO Psc
WX Pyx
V1223 Sgr
V1062 Tau
EI UMa
IGR 00234
IGR 15094
IGR 17303
Swift J0732
RX J0704
RX J1803
RX J2133
SDSS J233325
XSS 00564

Full Catalog

Related Systems

Position

• Equatorial: 19^h58^m14.48^s, +32^d32^m42.2^s (J2000)
• Galactic: l=69.05, b=+1.70

Finding Chart:

Israel et al (1999) (their star B).

Brigntness:

Optical V~16; fx (2-10 keV)~1.0x10^-11 ergs cm^-2s^-1 (ASCA)

IP Credential:

***** (Ironclad)

Periods:

• Orbital: 0.181 d = 4.35 h = 15660 s from optical spectroscopy and photometry according to Zharikov, Tovmassian & Echevarria (2002).; 0.2245 d = 5.387 h = 19393 s, according Norton et al (2002).
• Spin: 0.0169752 d = 24.44 min = 1466.66 s, from optical and X-ray photometry, in which half the spin period (733.33 s) is the dominant period.

  HJD = 2451739.318445(2) + 0.0084876(4)E

  (Norton et al 2002) for the two equally spaced minima per spin period.
• Others: Beat period of 1587.24 s is present in optical photometry, although one of its one-day aliases is stronger in the periodogram.

Inclination:

?

Distance:

?

References

• Brunschweiger et al. 2009
• Butters et al. 2009
• Israel et al. 1998
• Israel et al. 1999
• Negueruela, Reig & Clark 2000
• Norton et al. 2002
• Parker, Norton & Mukai 2005
• Uslenghi et al. 2000
• Uslenghi et al. 2001
• Zharikov et al. 2001
• Zharikov, Tovmassian & Echevarria 2002