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Name
  GK Per  
AAVSO UID
000-BBG-044 (113803 observations)  
Constellation
Perseus Sequence
J2000.0
03 31 12.01 +43 54 15.5  (52.80004 +43.90431) Search nearby
B1950.0 03 27 47.54 +43 44 04.5
Proper motion
RA: -8.0 +/- 2.3 mas/yDec: -17.9 +/- 1.5 mas/ySource: UCAC4
Galactic coord. 150.956 -10.104
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1A 0327+43 1RXS J033111.9+435427 1SWASP J033112.00+435414.9
1SWXRT J033111.7+435412 1SXPS J033112.0+435414 1WGA J0331.1+4354
2E 0327.7+4344 2E 785 2MASS J03311201+4354154
2MAXI J0330+438 2PBC J0331.1+4353 2RXP J033108.8+435333
2XMM J033112.0+435416 3A 0327+438 3XMM J033112.0+435415
AAVSO 0324+43 AN 3.1901 BD+43 740a
CMC 1101091 CMC15 J033112.0+435415 CSI+43 740 2
CXOGSG J033112.0+435415 Downes GK Per GSC 02874-00922
HD 21629 N Per 1901 NPM2 +43.0150
NSVS 4166492 Nova Per 1901 Nova Persei 1901
PBC J0331.1+4353 PPMX 033112.0+435415 SDSS J033112.00+435415.3
SWIFT J0331.1+4355 SWIFT J0331.2+4354 TASS4 6163821
UCAC2 46779212 UCAC4 670-019077 WISE J033111.99+435415.3
WISEA J033112.00+435415.2 X 03277+432 XMMOM J033112.0+435415
XMMSL2 J033112.3+435412 ZTF18abnzukj  
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Variability type
NA/DQ+UG
Spectral type WD+K2IVe
Mag. range
0.2 - 14.0 V
Discoverer Thomas David Anderson
Epoch
23 Feb 1901 (HJD 2415439.00000) Ephemeris
Outburst 1901
Period 1.996803 d
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Gaia DR2 parallax 2.2627 ± 0.0431 mas (distance 436.6 ± 8.4 pc).
2 Otero, Sebastian Alberto Outburst cycle 880-1240 d. Maximum has varied between V= 9.7 and 11.3.
3 GCVS Team SB2 (sdBE + K2IVp). The following types of activity are being observed after the return to the normal brightness: rapid irregular variations (Delta(m) ~0.1m in several minutes); irregular fluctuations from night to night (Delta(m) up to 0.3m); slow irregular variations (Delta(m) = 1.5m in several dozen days); bursts with light increase in 10d - 30d and decrease in 10d - 40d, Delta(m) up to 3.5m, the mean interval between bursts being delta(t) = 820d [F.Sabbadin, A.Bianchini, AsAp Suppl 54, 393, 1983., R.Hudec, BAC 35, N3, 150, 1984.]. According to [D.Crampton, A.P.Cowley, W.A. Fisher, ApJ 300, 788, 1986.], the radial velocities are represented with the elements Max (Vr > 0) = 2444912.966 + 1.996803d*E (Kabs = 124 km/s, Kem = 34 km/s). According to [N.E.Kurochkin, E.A.Karitskaya, Astron. Tsirk. N1441, 1986.], the 2d variation is modulated with a period of 0.131623d, Max (delta(Vr)) ~2443787.995 (Kabs = 15 km/s, Kem = 20 km/s). During a burst the sinusoidal modulation of X-ray flux was recorded, Tmax = 24455555.67456 + 0.004066443d*E [M.G.Watson, A.R.King, J.Osborne, MN 212, N4, 917, 1985.]. ExpAnding envelope (0.454"/yr, 1948 - 1964; 0.432"/yr, 1964 - 1981, [L.Muench, BAAS 16, 217, 1984.]).
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References
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1 Results of Optical Monitoring of Cataclysmic Variable GK Per in 2004 2006Ap&SS.304..287V
2 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
3 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 2002MNRAS.329..597M
4 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
5 D. Crampton, A.P. Cowley, W.A. and Fisher, 1986, ApJ 300, 788 1986ApJ...300..788C
6 K. Mukai, The Intermediate Polars --
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 10.86H = 10.27K = 10.06J - K = 0.79
AllWISE W1 = 9.81W2 = 9.70W3 = 9.47W4 = 8.80W1 - W2 = 0.11W3 - W4 = 0.68
APASS-DR9 B = 14.14V = 13.09g' = 13.62r' = 12.67i' = 12.20B - V = 1.05
GALEX-DR5 FUV = 15.70NUV = 15.03FUV - NUV = 0.66
SDSS-DR12 u = 15.17g = 15.05r = 15.66i = 14.61z = 12.42u - g = 0.12r - i = 1.04
Images
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Revision History
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6 Schmeer, Patrick 2018-08-24 13:47 UTC Gaia DR2 position. Discoverer's given names added.
5 Otero, Sebastian Alberto 2011-05-16 20:04 UTC Primary record creation. Variability and spectral types from reference.
4 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
3 Admin, VSX 2009-08-27 23:36 UTC Update from [1986ApJ...300..788C].
2 Admin, VSX 2007-03-23 19:52 UTC Discoverer added.
1 Admin, VSX 2005-12-18 01:33 UTC Initial database population.

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