National Aeronautics and Space Administration

IPs

V455 And
V515 And
AE Aqr
FO Aqr
V349 Aqr
XY Ari
V405 Aur
V647 Aur
HT Cam
MU Cam
DW Cnc
BG CMi
V709 Cas
V1025 Cen
V1033 Cas
TV Col
TX Col
UU Col
V2069 Cyg
V2306 Cyg
DO Dra
PQ Gem
V418 Gem
DQ Her
V1323 Her
V1460 Her
V1674 Her
EX Hya
NY Lup
V2400 Oph
V2731 Oph
V3037 Oph
V598 Peg
GK Per
AO Psc
HZ Pup
V667 Pup
WX Pyx
V1223 Sgr
V4743 Sgr
CC Scl
V1062 Tau
EI UMa
AX J1740.1
AX J1832.3
AX J1853.3
CTCV J2056
CXO J174954
IGR J04571
IGR J08390
IGR J15094
IGR J16500
IGR J16547
IGR J17014
IGR J17195
IGR J18151
IGR J18173
IGR J18308
IGR J19267
LAMOST 0240
PBC J0927.8
PBC J1841.1
RX J1804
RX J2015
RX J2113
RX J2133
RX J2306
Swift J0717
Swift J1839
Swift J2006
Swift J2138

Full Catalog

Related Systems

Position

• Equatorial: 20^h15^m36.96^s, +37^d11^m22.9^s (Gaia)
• Galactic: l=74.89, b=+1.20

Finding Chart:

Halpern et al. (2001)

Brigntness:

Optical: G=17.6 (Gaia); X-rays: 3.7x10^-12 ergs cm^-2 s^-1 (4XMM-DR11); some fraction of 1.8x10^-11 ergs cm^-2 s^-1 (BAT 157m; 14-195 keV)

IP Credential:

**** (Confirmed): This CV and a blazar are both thought to contribute to the BAT source, Swift J2015.9+3715. Now that the spectroscopic orbital period of 0.5317 d has been found, to go with the 7196 s spin period, this object is confirmed to be an IP.

Periods:

• Orbital: 0.531713 d = 12.7611 h = 45940.0 s
• Spin: 0.08328 d = 119.9 m = 7196 s, seen in X-rays.
• Others:

Inclination:

Distance:

1508 (1365-1675) pc (Gaia EDR3; parallax: 0.676+/-0.070 mas)

References

• Halpern et al. 2001 (gamma-ray source identification)
• Bassani et al. 2014 (X-rays and gamma-rays)
• Halpern & Thorstensen 2015 (optical identification and characterization)
• Coti Zelati et al.2016 (X-rays)
• Halpern et al. 2018 (optical photometry and spectroscopy)