An Extensive Photometric Investigation of the W UMa System DK Cyg

Table 1

Times of minimum light for DK Cyg.

HJD	Method				References	HJD	Method				References
2434179.4690	Vis	−8116	0.00970	0.00971	1	2451749.4450	pe	29212	0.04885	−0.00370	3
2447758.4352	Pe	20733	0.02423	−0.00099	2	2451777.6740	ccd	29272	0.03642	−0.01636	5
2447790.4437	Pe	20801	0.02577	0.00037	2	2452163.6590	ccd	30092	0.05517	−0.00074	5
2447963.6620	Pe	21169	0.02995	0.00354	3	2452245.5592	ccd	30266	0.05521	−0.00137	5
2447963.8960	Pe	21169.5	0.02860	0.00220	3	2452253.5613	ccd	30283	0.05557	−0.00108	5
2448265.1380	Pe	21809.5	0.02865	0.00046	4	2452441.8384	ccd	30683	0.05645	−0.00176	5
2448265.1382	Pe	21809.5	0.02885	0.00066	4	2452512.4415	pe	30833	0.05597	−0.00284	7
2448272.1987	Pe	21824.5	0.02899	0.00076	4	2452525.6231	ccd	30861	0.05824	−0.00069	5
2448297.6160	Pe	21878.5	0.02900	0.00062	3	2452526.5644	ccd	30863	0.05816	−0.00078	5
2448302.7930	Pe	21889.5	0.02841	−0.00001	3	2452811.8062	ccd	31469	0.06148	0.00013	5
2448308.2078	Pe	21901	0.03027	0.00182	4	2453223.4286	ccd	32343.5	0.06500	−0.00006	8
2448308.2079	Pe	21901	0.03037	0.00192	4	2453228.3681	ccd	32354	0.06225	−0.00274	8
2448336.4491	Pe	21961	0.03013	0.00152	4	2453246.4950	ccd	32392.5	0.06756	0.00242	8
2449988.5840	ccd	25471	0.04120	0.00182	5	2453247.4346	ccd	32394.5	0.06578	0.00063	8
2450003.6456	ccd	25503	0.04070	0.00122	5	2453285.3260	ccd	32475	0.06659	0.00110	8
2450313.8240	ccd	26162	0.03403	−0.00765	5	2453286.2657	ccd	32477	0.06491	−0.00059	8
2450341.6130	ccd	26221	0.05229	0.01041	5	2453302.2672	ccd	32511	0.06293	−0.00271	8
2450397.6060	ccd	26340	0.03311	−0.00917	5	2454799.5505	ccd	35692	0.07959	0.00004	9
2450692.7400	ccd	26967	0.04414	−0.00030	5	2455043.8381	ccd	36211	0.07882	−0.00310	10
2451000.0990	pe	27620	0.04221	−0.00452	5	2455062.6680	ccd	36251	0.08107	−0.00105	11
2451095.6600	ccd	27823	0.05303	0.00557	5	2455088.5544	ccd	36306	0.07953	−0.00285	10
2451160.5980	ccd	27961	0.03573	−0.01222	5	2455810.6029	ccd	37840	0.08870	−0.00096	12
2451379.4820	pe	28426	0.04863	−0.00101	3

(1) Szafraniec [30]; (2) Hubscher et al. [31]; (3) Wolf et al. [27]; (4) Hipparcos observations (unpublished); (5) Baldwin and Samolyk [32]; (6) Kiss et al. [25]; (7) Borkovits et al. [33]; (8) Borkovits et al. [28]; (9) Gerner [34]; (10) Menzies [35]; (11) Samolyk [36]; (12) Simmons [22].