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: 07^h51^m17.32^s, +14^d44^m24.0^s (Gaia)
• Galactic: l=206.06, b=+19.77

Finding Chart:

Mason et al. (1992)

Brigntness:

Optical G=14.1 (Gaia); X-rays: 3.2x10^-11 ergs cm^-2s^-1 (BAT 157m; 14-195 keV), 2.8x10^-11 ergs cm^-2s^-1 (4XMM-DR11)

IP Credential:

***** (Ironclad) The spin period is confirmed many times over, and the orbital period is determined using optical spectroscopy.

Periods:

• Orbital: 0.216359 d = 5.1926 hr= 18693.4 s

  HJD=2449333.984(4)+0.216359(3)E

  (Hellier (1997a)) for red-to-blue crossing of the emission lines, though there is some uncertainty over the cycle count.
• Spin: 0.0096460639 d = 13.890332 min = 833.41992 s, seen in X-rays and optical.

  TDB_dip = 2450103.152344(53) + 0.0096460639(4)E + 4.379(26)x10^-13E²

  (Evans, Hellier & Ramsay (2006); Note that there is a typographical error in this ephemeris as published in MNRAS. The extraneous "4" after "(26)" should be ignored: Evans 2008, private communication.)
  See the complex X-ray spin pulse shapes.
• Others: 14.5 min sideband period.

Inclination:

Low? (little orbital modulation)

Distance:

733.6 (719.4-749.7) pc (Gaia EDR3; parallax: 1.325+/-0.023 mas)

References

1. Ishida 1991 (X-rays)
2. Mason et al. 1992 (X-rays, extremeultraviolet, optical & infrared)
3. Piirola, Hakala & Coyne 1993 (optical polarimetry)
4. Rosen, Mittaz & Hakala 1993 (optical spectroscopy, photometry & polarimetry)
5. Hilditch & Bell 1994 (optical photometry)
6. Duck et al. 1994 (X-rays)
7. Hellier, Ramseyer & Jablonski 1994 (optical photometry)
8. Haberl & Motch 1995 (X-rays)
9. Vaeth, Chanmugam & Frank 1996 (cyclotron and X-ray model)
10. Potter et al. 1997 (optical & infrared photometry and polarimetry)
11. Dhillon et al. 1997 (infrared spectroscopy)
12. Mason 1997 (X-ray and optical spin timings)
13. Hellier 1997 (spin-resolved optical spectroscopy)
14. Stavroyiannopoulos et al. 1997 (time-resolved ultraviolet spectroscopy)
15. Howell et al. 1997 (extreme ultraviolet and optical polarimetry)
16. Cropper, Ramsay & Wu 1998 (X-ray spectroscopy)
17. Somov, Somova & Najdenov 1998a (optical spectroscopy)
18. Cash, Howell & Rosen 1998 (far ultraviolet spectroscopy)
19. Hellier, Mukai & Osborne 1998 (X-ray spectroscopy)
20. Somov, Somova & Najdenov 1998b (optical spectropolarimetry)
21. Kiziloglu et al. 1998 (X-ray spectroscopy)
22. Belloni et al. 1999 (X-rays)
23. Ezuka & Ishida 1999 (X-ray spectroscopy)
24. Hellier 1999 (spin tomography)
25. Cropper et al. 1999 (post-chock model with gravity)
26. James et al. 2002 (X-rays)
27. de Martino et al. 2004 (X-rays)
28. Suleimanov, Revnivtsev & Ritter 2005 (X-ray spcectroscopy)
29. Parker, Norton & Mukai 2005 (X-ray timing)
30. Evans, Hellier & Ramsay 2006 (X-rays)
31. Evans & Hellier 2007 (X-rays - soft component search)
32. Brunschweiger et al. 2009 (X-rays)
33. Scaringi et al. 2010 (X-rays)
34. Anzolin et al. 2010 (X-ray flickering)
35. Yuasa et al. 2010 (X-ray spectroscopy)
36. Pretorius & Mukai 2014 (space density)
37. Sanad 2015 (ultraviolet)
38. Barrett et al. 2017 (radio)
39. Schwope 2018 (space density)
40. Suleimanov, Doroshenko & Werner 2019 (X-ray spectroscopy)
41. Shaw et al. 2020 (X-ray spectroscopy)