COMMUNICATIONS MITTEILUNGEN
FROM THE DER
KONKOLY OBSERVATORY STERNWARTE
OF THE DER UNGARISCHEN AKADEMIE
HUNGARIAN ACADEMY OF SCIENCES DER WISSENSCHAFTEN
BUDAPEST - SZABADSAGHEGY
No. 91.
(Vol. 10, Part 5)
UBV OBSERVATIONS OF THE RS CVn BINARY
HK LACERTAE BETWEEN 1978-1985
KATALIN OLAH
(Konkoly Observatory of the Hungarian Academy of Sciences)
DOUGLAS S. HALL
(Dyer Observatory, Vanderbilt University, Nashville, Tenn., USA)
BUDAPEST, 1988
ISBN 963 8361 28 X
HU ISSN 0328 - 2091
UBV OBSERVATIONS OF THE RS CVn BINARY
HK LACERTAE BETWEEN 1978-1985
Abstract
We report 524 UBV observations of the RS CVn binary HK Lac made
between 1978-1985. Our starspot modelling results published previ-
ously for 12 light curves (using V colour) are summarized. Three ad-
ditional modelled light curves are presented which have not been
published before.
Nine UBV light and colour curves obtained between 1982-85 in 16
American and 2 Hungarian observatories, are given. Light curve mod-
elling made for the V and B light curves separately show that the
resulting model parameters agree well within the error of the mod-
elling procedure.
Introduction and Observations
We have previously published two detailed papers on HK Lac describing
its light variation on the basis of starspot modelling (Olah et al., 1985,
1986, hereafter Paper I and Paper II, respectively). The observations we used
were only published in part so we have compiled a complete presentation here
for future use by other investigators.
The magnitudes presented here are individual values, but when performing
the light curve modelling for Paper II, we formed nightly means if we had more
than one value per night. The DeltaV magnitudes used in Paper I are individual
values and that table (Table VII in Paper I) is repeated here in full.
Observations have been secured altogether in 18 observatories in the
standard UBV system, the observers and observatories are listed in Table I. No
systematic differences have been found between the photometric results of the
different observatories.
Table III gives UBV magnitudes of HK Lac with respect to HD 208728 (C1).
The DeltaV magnitudes of this table have already been published in Paper I. We
repeat in Table III only those measurements which can be supplemented with the
corresponding DeltaB and DeltaU magnitudes. In the beginning of this table UBV magni-
tudes observed by K.O. between 1976-1978 (Olah, 1979) are given.
The UBV magnitude differences (with respect to HD 210731 (C2) of Table
IV have not been presented before. From this table the DeltaV observations made
between J.D. 2445195-2446068 were used in modelling the light curves of Paper
II. Additional 100 observations gathered between J.D. 2446181-2446367 which
have not been cited before in details, close Table IV.
To complete the lists of observations, Table V gives the rest of DeltaV
observations from Paper I.
Table I.
Observer Observatory Telescope Aperture
Boyd, L. J. Fairborn 10 inch
Burke, E.W. Jr. Kitt Peak 16 inch
Chambliss, C.R. Kutztown 15 inch
Eaton, J.A. Kitt Peak 16 inch
Fried, R.E. Braeside 16 inch
Genet, R.M. Fairborn 10 inch
Henry, G.W. Dyer 24 inch
Kitt Peak 16 inch
Cloudcroft 48 inch
Landis, H.J. Landis 8 inch
Lines, H.C. Lines 20 inch
Lines, R.D. Lines 20 inch
Louth, H. Louth 11 inch
Miles, R. Mouldsworth 11 inch
Nielsen, P. Nielsen 4 inch
Olah, K. Konkoly 24 inch
Piszkesteto 20 inch
Renner, T.R. Scuppernong 10 inch
Stelzer, H.J. Stelzer 14 inch
Troeger, J.C. Sky Lights 8 inch
Wasatonic, R.P. Pulpit Rock 20 inch
Wasson, N.F. Sunset Hills 8 inch
All magnitude tables (III-V) contain some sporadic observations which
have never been used for starspot modelling since they did not form appropri-
ate light curves.
Magnitude differences between HD 208728 (C1) and HD 210721 (C2), were
published in the Inf. Bull. Var. Stars (Olah, 1979).
Results
Most of our starspot modelling results have already been published in
Papers I and II. The main goal of those papers was, using solar analogies, to
identify stable active longitudes on the surface of the star. Two different
methods were used to determine the position of the corotating latitude situat-
ed about 30 degrees above and below the equator. We found complex but possible
7 year cyclic variations in the median brightness of the star.
In the present paper we show that spot models made in different colours
of the same light curve give the same result within the error of the determi-
nation of the parameters. From UBV light curves observed between 1982-85 the
V colour has already been fitted by two spots. Here we supplement by giving
model results from the B data.
For spot modelling we used the equations developed by Budding (1977)
combined with a grid-search method to find the proper parameters. As orbital
inclination we found i = 60deg (Paper I). Limb darkening coefficients were
0.75 (V), 0.85 (B), 0.91 (U), from Manduca et al. (1977). The time of 0 longi-
tude was the time of maximum + 180 degrees. We took the flux ratios 0.4 (V),
0.36 (B), 0.33 (U) from Planck functions assuming that the spots were 2000 OK
cooler than the surrounding photosphere. The 1.0 intensity was given by the
local maximum. The overall light variation was considered to be produced by
spotted belts around the star situated parallel to the equator. In most of the
cases we fitted the light curves by two spots. For modelling details see
Paper I.
Table II lists the J.D. intervals, epochs and the resulting spot parame-
ters. When both V and B models are available, we give them separately in
addition to their average values. The modelling results made separately for
the V and B light curves agree reasonably well. Typical uncertainties in the
parameters are as follows: +/- 2-3 degrees in longitude, +/- 5-8 degrees in
Table II Resulting spot parameters
No. J.D. (2440000+) epoch Period lambda_1 lambda_2 beta_1 beta_2 gamma1 gamma2 color
interval
1 3355-3455 3348.3 25.042 314 80 55 -6 22.9 23.3 V
2 3634-3721 3617.6 23.385 322 72 51 -7.5 23.0 26.0 V
3 3722-3806 3709.8 25.203 335 63 49 26 24.0 19.7 V
4 3855-4094 3812.1 24.282 317 63 48 6 26.8 30.7 V
5 4496-4561 4445.1 24.174 296 57 38 27.5 22.5 26.6 V
6 4865-4968 4840.8 24.243 310 70 40 26.5 18.6 15.9 V
270 50 12 46 18.2 27.9 V
276 52 3 42 17.9 25.9 B
7 5195-5279 5180.8 23.724 273 51 8 44 18.1 26.9 mean
318 52 57 23 24.2 28.1 V
320 54 59 25 23.6 28.0 B
8 5471-5622 5448.0 24.397 319 53 58 24 23.9 28.1 mean
335 60 53 17 27.0 28.0 V
335 61 50 14 26.9 28.0 B
9 5628-5687 5618.4 24.397 335 61 52 16 27.0 28.0 mean
339 -- 45 -- 37.2 ---- V
337 -- 52 -- 41.8 ---- B
10 5697-5713 5695.1 24.429 338 -- 49 -- 39.5 ---- mean
304 18 7 53 26.0 19.9 V
305 2 31 58 22.4 19.0 B
11 5820-5899 5819.3 24.461 304 10 19 56 24.2 19.5 mean
303 8 11 63 21.3 21.3 V
315 18 27 60 21.0 22.6 B
12 5970-6028 5965.0 24.461 309 13 19 62 21.2 22.0 mean
345 56 48 29 23.3 19.1 V
341 59 52 52 23.1 21.1 B
13 6030-6068 6010.9 24.461 343 58 50 41 23.2 20.1 mean
321 51 43 34 29.2 22.1 V
325 59 45 27 29.7 21.2 B
14 6181-6282 6159.8 24.389 323 55 44 31 29.5 21.7 mean
308 40 36 50 27.9 22.0 V
307 41 31 45 28.0 22.0 B
15 6283-6338 6257.7 24.501 308 41 33 48 28.0 22.0 mean
latitude and +/- 0.5 degree in radius. The latitude parameter is the most un-
certain one of all the fitted parameters. In two cases (model 11 and 13) one
can find larger discrepancies in one of the latitude and the corresponding
radius results obtained from the V and B light curves. Except model 10 (see
below) these two light curves had far the smallest number of observations: 18
(model 11) and 15 (model 13) data points were fitted. This shows, obviously,
that more observational data give less uncertain parameters.
The last 9 light curves are displayed in Figures 1-9, together with the
colour curves. The U measurements were not modelled, the curve is drawn with
the resulted average parameters (determined by B and V light curves) and
using the above mentioned limb darkening coefficient and flux ratio.
The models of No. 10, 14 and 15 from Table V have not been published
before, but the model parameters were used in a recent paper (Olah et al.,
1988). Model No. 10 (Figure 4), is very uncertain because of the few observa-
tional points, but is the only light curve of the star which could be fitted
by one single spot.
Interesting new results about starspot proper motion on HK Lac, and also
a figure of the positions of the activity centers on the star, were given in
the above mentioned paper (Olah et al., 1988).
Budapest - Szabadsaghegy, 1988. April 8.
References:
Budding, E., 1977, Astrophys. Space Sci. 48.207
Manduca, A., Bell, R.A., Gustaffson, B., 1977, Astron. Astrophys. 61.809
Olah, K., 1979, Inf. Bull. Var. Stars No. 1717 (IBVS N°.1717)
Olah, K., Eaton, J.A., Hall, D.S., Henry, G.W., Burke, E.W. Jr., Chambliss,
C.R., Fried, R.E., Landis, H.J., Louth, H., Renner, T.R., Stelzer, H.J.,
Wasatonic, R.P., 1985, Astrophys. Space Sci. 108.137 (Paper I)
Olah, K., Gesztelyi, L., Holl, A., 1988, Proc. Xth European Regional Astr.
Meeting (in press)
1987eram....5...95O
Olah, K., Hall, D.S., Boyd, L.J., Genet, R.M., Fried, R.E., Lines, R.D.,
Lines, H.C., Louth, H., Miles, R., Nielsen, P., Stelzer, H.J., Troeger,
J.C., Wasson, N.F., 1986, Astrophys. Letters 25.133 (Paper II)
Figure 1: Light and colour curves of HK Lac (model 7)
Figure 2: Light and colour curves of HK Lac (model 8)
Figure 3: Light and colour curves of HK Lac (model 9)
Figure 4: Light and colour curves of HK Lac (model 10)
Figure 5: Light and colour curves of HK Lac (model 11)
Figure 6: Light and colour curves of HK Lac (model 12)
Figure 7: Light and colour curves of HK Lac (model 13)
Figure 8: Light and colour curves of HK Lac (model 14)
Figure 9: Light and colour curves of HK Lac (model 15)
091-t3.txt
Table III
UBV magnitudes of HK Lac with respect to HD 208728 (C1)
J.D. Delta U Delta B Delta V
3045.437 ---- -.013 .100
3048.522 ---- -.011 .126
3073.303 ---- .002 .107
3076.286 -.095 -.002 .112
3077.230 -.053 .018 .122
3079.217 -.042 .037 .180
3108.254 -.025 .093 .192
3368.503 -.090 .024 .130
3385.525 ---- -.056 .086
3432.316 -.138 -.017 .115
3434.322 -.113 -.012 .117
3438.356 -.112 -.007 .113
3455.286 -.107 .014 .152
3482.276 -.137 -.024 .124
3514.222 -.188 -.029 .088
3713.473 -.002 .096 .199
3727.547 -.167 -.034 .078
3739.464 -.025 .065 .177
3740.412 -.077 .059 .162
3742.456 -.038 .009 .111
3747.497 ---- -.101 .039
3766.378 -.063 .016 .122
3777.461 -.152 -.048 .077
3797.304 -.225 -.113 .022
3879.209 ---- -.011 .091
3881.232 ---- .039 .157
4034.950 ---- .092 .223
4035.945 ---- .063 .197
4036.937 ---- .018 .158
4038.954 ---- -.061 .081
4043.947 ---- -.121 .018
4045.942 ---- -.097 .040
4048.944 ---- -.073 .066
4069.878 ---- -.115 .034
4086.810 ---- -.019 .125
4091.849 ---- -.138 -.008
4172.369 -.185 -.081 .044
4474.785 ---- .058 .139
4483.688 ---- -.102 -.011
4497.717 ---- .061 .152
4502.390 -.259 -.122 .029
4502.708 ---- -.094 .009
4511.375 -.115 -.041 .085
4514.350 -.092 -.004 .115
4533.439 -.206 -.078 .050
4541.244 -.082 .004 .109
4561.250 -.108 -.015 .082
4605.265 -.247 -.118 -.017
4613.257 -.150 -.039 .067
4621.344 ---- .022 .114
4628.246 -.247 -.144 -.013
4633.242 ---- -.073 .048
4635.231 -.130 -.038 .074
4638.246 -.153 -.049 .085
4783.522 -.127 -.024 .084
4787.536 -.004 .075 .169
4811.464 -.056 .069 .170
4813.422 -.042 .081 .184
4822.412 -.172 -.043 .063
4854.459 -.142 -.032 .067
4873.453 -.148 -.044 .054
091-t4.txt
Table IV
UBV magnitudes of HK Lac with respect to HD 210731 (C2)
J.D. Delta U Delta B Delta V
2440000+
5195.585 ---- ---- -.541
5210.509 ---- ---- -.509
5213.855 .583 -.088 -.571
5218.451 .584 -.077 -.563
5219.479 ---- -.050 -.539
5221.426 .658 -.025 -.517
5223.451 .645 -.009 -.509
5224.444 .645 -.018 -.518
5225.465 .662 -.018 -.501
5226.482 .630 -.024 -.510
5228.505 .635 .014 -.471
5228.835 .715 .040 -.445
5228.840 ---- ---- -.451
5229.426 .678 .047 -.449
5230.449 .710 .079 -.429
5230.672 ---- ---- -.417
5231.806 .760 .073 -.422
5234.810 .691 .009 -.488
5239.437 .572 -.096 -.596
5243.773 .608 -.056 -.538
5244.765 .632 -.039 -.532
5245.578 ---- ---- -.509
5245.743 .649 -.026 -.516
5246.499 ---- -.051 -.535
5247.778 .648 -.024 -.514
5250.824 .639 -.013 -.493
5253.595 ---- ---- -.419
5254.796 .754 .076 -.416
5256.780 .752 .077 -.418
5257.763 .690 .025 -.456
5259.415 .654 .009 -.488
5259.547 ---- ---- -.461
5261.361 .591 -.049 -.533
5261.824 .603 -.062 -.541
5265.563 ---- ---- -.590
5270.721 .667 -.014 -.507
5275.761 .684 .011 -.499
5279.717 .780 .108 -.391
5306.644 .760 .104 -.387
5310.688 ---- ---- -.508
5311.506 ---- ---- -.542
5316.674 .594 -.067 -.544
5319.668 .648 -.030 -.516
5322.673 .723 .008 -.477
5325.475 ---- ---- -.344
5471.557 .724 .087 -.399
5473.539 .834 .168 -.336
5475.542 .815 .158 -.353
5493.489 .663 .002 -.472
5508.471 .522 -.120 -.593
5521.510 .708 .095 -.385
5525.910 .812 .127 -.376
5526.539 .780 .109 -.388
5528.515 .659 .011 -.478
5529.930 .616 -.049 -.527
5531.944 .569 -.097 -.570
5532.517 .533 -.112 -.585
5532.902 .564 -.107 -.581
5533.487 .546 -.095 -.579
5534.750 ---- ---- -.592
5539.817 ---- ---- -.483
5541.475 .638 -.021 -.492
5542.517 .672 .027 -.458
5545.732 ---- ---- -.369
5546.519 .810 .158 -.346
5547.515 .807 .151 -.347
5547.721 ---- ---- -.349
5548.711 ---- ---- -.356
5560.963 ---- ---- -.542
5566.565 .674 .027 -.450
5572.862 .818 .149 -.343
5574.884 .765 .101 -.392
5580.741 ---- ---- -.581
5581.718 ---- ---- -.578
5581.853 .556 -.104 -.586
5582.732 ---- ---- -.586
5582.741 ---- ---- -.579
5583.726 ---- ---- -.574
5583.781 ---- -.080 -.572
5585.716 ---- ---- -.514
5586.705 ---- ---- -.523
5586.846 .638 -.042 -.523
5587.724 ---- ---- -.520
5588.444 .626 -.014 -.502
5588.886 .657 -.008 -.494
5589.889 .691 .012 -.464
5591.709 ---- ---- -.432
5595.695 ---- ---- -.339
5596.699 ---- ---- -.337
5596.786 .849 .167 -.342
5597.364 .803 .153 -.344
5599.695 ---- ---- -.403
5601.372 .676 .029 -.464
5601.670 ---- ---- -.474
5603.328 .589 -.070 -.552
5604.334 .539 -.098 -.580
5605.462 .529 -.114 -.593
5606.494 .502 -.125 -.595
5606.710 ---- ---- -.587
5607.418 .529 -.114 -.591
5618.669 ---- ---- -.371
5619.627 ---- ---- -.352
5619.718 ---- ---- -.334
5621.629 ---- ---- -.347
5622.392 .788 .134 -.359
5628.615 ---- ---- -.599
5630.624 ---- ---- -.619
5631.621 ---- ---- -.610
5632.640 ---- ---- -.595
5633.622 ---- ---- -.576
5635.354 .537 -.096 -.575
5635.627 ---- ---- -.557
5636.331 .531 -.093 -.568
5636.585 ---- ---- -.523
5641.707 .795 .106 -.395
5642.643 ---- ---- -.378
5643.636 ---- ---- -.352
5645.736 .851 .164 -.345
5646.597 ---- ---- -.365
5647.746 .789 .109 -.386
5648.323 .751 .093 -.402
5649.347 .668 .033 -.460
5649.637 ---- ---- -.471
5650.608 ---- ---- -.515
5651.290 .582 -.068 -.545
5652.664 .501 -.096 -.597
5653.352 .510 -.127 -.605
5653.627 .469 -.126 -.608
5654.632 .499 -.128 -.610
5654.652 ---- ---- -.628
5655.664 .484 -.114 -.598
5657.660 .539 -.121 -.572
5658.587 .509 -.080 -.592
5662.710 .636 -.008 -.476
5665.625 .714 .104 -.405
5665.682 .748 .085 -.409
5666.589 .669 .095 -.417
5667.606 .763 .150 -.356
5667.612 ---- ---- -.376
5667.673 .792 .132 -.358
5668.583 .766 .169 -.341
5673.616 .643 .054 -.450
5674.647 .603 .008 -.489
5675.629 .560 -.045 -.521
5676.579 .527 -.080 -.564
5677.608 .490 -.105 -.597
5678.615 .492 -.123 -.603
5679.637 .484 -.131 -.607
5681.665 .513 -.121 -.587
5683.595 .539 -.076 -.566
5684.571 .569 -.045 -.547
5685.571 .569 -.019 -.528
5686.578 .586 0.000 -.515
5687.581 .644 .032 -.481
5697.577 .722 .124 -.402
5698.574 .671 .040 -.446
5699.569 .630 .011 -.496
5700.610 .575 -.050 -.522
5703.582 .527 -.079 -.526
5704.596 .503 -.122 -.588
5710.598 .567 -.041 -.536
5711.580 .622 -.006 -.528
5713.571 .712 .079 -.422
5820.981 .662 .060 -.450
5823.972 .611 -.004 -.500
5824.965 .613 -.028 -.501
5825.963 .614 -.024 -.530
5826.963 .576 -.045 -.532
5827.956 .544 -.041 -.541
5828.955 .563 -.050 -.550
5829.965 .569 -.059 -.565
5830.951 .580 -.053 -.549
5831.947 .540 -.052 -.545
5832.945 .579 -.052 -.552
5836.935 .687 .061 -.463
5837.930 .732 .108 -.397
5838.929 .767 .134 -.380
5862.907 .686 .080 -.406
5871.929 .642 .001 -.481
5872.955 .643 -.020 -.489
5873.944 .621 -.033 -.522
5970.752 .598 .008 -.505
5971.724 .572 -.015 -.507
5972.752 .603 -.034 -.527
5973.774 .594 -.053 -.540
5983.769 .661 .058 -.462
5984.691 .712 .086 -.417
5986.710 .736 .142 -.386
5987.714 .748 .145 -.373
5990.735 .690 .081 -.429
5991.767 .642 .067 -.465
5992.738 .644 .022 -.479
5993.737 .597 -.003 -.505
5994.749 .583 -.004 -.505
5997.698 .549 -.058 -.550
5999.676 .530 -.071 -.553
6000.702 .522 -.064 -.555
6001.668 .538 -.064 -.549
6002.671 .540 -.068 -.546
6004.674 .580 -.037 -.534
6005.655 .598 -.020 -.518
6006.657 .635 .013 -.497
6007.656 .676 .043 -.466
6008.656 .706 .077 -.423
6009.691 .722 .095 -.406
6010.648 .747 .121 -.381
6012.653 .738 .139 -.382
6013.757 .706 .093 -.395
6014.645 .693 .071 -.417
6015.711 .687 .068 -.451
6016.713 .632 .038 -.475
6021.653 .526 -.035 -.550
6022.635 .560 -.065 -.535
6024.634 .519 -.072 -.545
6025.644 .551 -.077 -.560
6028.662 .598 -.048 -.532
6030.626 .634 .008 -.485
6031.633 .660 .040 -.464
6032.619 .689 .070 -.442
6034.629 .737 .100 -.411
6036.626 .788 .145 -.360
6039.676 .699 .077 -.433
6043.623 .573 -.023 -.533
6046.664 .550 -.079 -.558
6051.589 .542 -.066 -.556
6055.611 .625 .009 -.486
6056.619 .679 .042 -.456
6058.625 .766 .060 -.422
6060.614 .745 .108 -.390
6064.608 .678 .030 -.449
6068.576 .584 -.032 -.535
6181.567 .741 .083 -.383
6187.977 .727 .103 -.430
6190.979 .624 -.001 -.515
6197.956 .494 -.088 -.577
6198.954 .538 -.084 -.573
6199.954 .535 -.064 -.547
6204.950 .706 .096 -.426
6205.938 .773 .134 -.370
6206.929 .776 .152 -.351
6207.926 .698 .132 -.358
6208.928 .728 .149 -.359
6209.916 .734 .131 -.365
6210.915 .696 .105 -.389
6211.524 .696 .068 -.422
6211.912 .697 .102 -.413
6213.533 .645 .005 -.486
6213.904 .640 .036 -.467
6218.900 .526 -.083 -.570
6221.938 .500 -.103 -.596
6222.889 .498 -.100 -.561
6223.890 .526 -.081 -.581
6224.881 .623 -.059 -.554
6225.875 .664 -.012 -.509
6226.872 .694 .046 -.448
6228.497 .731 .087 -.420
6229.865 .736 .141 -.371
6230.862 .738 .140 -.371
6231.867 .770 .152 -.350
6233.895 .738 .143 -.363
6234.901 .734 .124 -.384
6235.846 .723 .098 -.415
6236.873 .673 .057 -.447
6237.892 .662 .041 -.454
6238.850 .662 .015 -.498
6241.874 .553 -.066 -.564
6242.873 .513 -.111 -.591
6243.878 .503 -.090 -.594
6244.931 .520 -.103 -.593
6245.872 .459 -.112 -.603
6248.840 .549 -.059 -.554
6249.916 .606 -.035 -.517
6250.845 .612 .022 -.466
6251.912 .546 .037 -.453
6252.932 .708 .083 -.403
6259.851 .705 .114 -.386
6267.829 .495 -.102 -.588
6269.848 .462 -.116 -.605
6270.828 .494 -.114 -.597
6271.827 .535 -.101 -.577
6272.793 .605 -.065 -.547
6277.948 .769 .147 -.372
6281.880 .770 .150 -.367
6282.784 .786 .139 -.367
6283.399 .736 .074 -.429
6283.784 .711 .100 -.406
6285.995 .662 .030 -.493
6286.832 .623 .015 -.493
6287.886 .605 -.036 -.523
6288.952 .595 -.067 -.563
6289.833 .568 -.067 -.560
6290.782 .533 -.087 -.575
6291.771 .520 -.095 -.579
6292.767 .481 -.110 -.598
6293.479 .519 -.125 -.607
6293.771 .479 -.129 -.603
6296.771 .514 -.105 -.581
6298.876 .592 -.026 -.522
6299.366 .675 .025 -.482
6299.810 .645 .023 -.482
6300.761 .686 .072 -.434
6301.796 .745 .093 -.412
6304.833 .782 .142 -.362
6306.780 .699 .114 -.381
6307.761 .751 .106 -.404
6308.883 .669 .044 -.447
6309.398 .679 .055 -.458
6312.753 .567 -.053 -.544
6313.753 .546 -.054 -.544
6314.744 .542 -.062 -.560
6316.737 .518 -.110 -.595
6317.747 .473 -.117 -.613
6320.743 .522 -.097 -.598
6321.784 .529 -.093 -.572
6322.737 .546 -.057 -.539
6325.752 .717 .086 -.422
6327.786 .745 .138 -.387
6328.825 .747 .128 -.387
6329.723 .763 .121 -.377
6330.729 .713 .119 -.409
6331.729 .708 .082 -.428
6332.754 .656 .036 -.453
6333.720 .611 .028 -.467
6334.784 .619 -.013 -.518
6338.736 .548 -.081 -.572
6356.327 .741 .087 -.426
6359.330 .659 .006 -.503
6364.314 .587 -.059 -.556
6365.367 .568 -.080 -.571
6366.354 .549 -.092 -.580
6367.330 .524 -.103 -.593
091-t5.txt
Table V
V observations of HK Lac with respect to HD 208728 (C1)
J.D. Delta V
2440000+
3633.960 0.131
3650.807 0.081
3659.834 0.164
3662.871 0.195
3676.842 0.075
3714.820 0.212
3718.762 0.139
3721.775 0.068
3722.786 0.048
3723.777 0.037
3726.783 0.053
3727.753 0.093
3747.719 0.038
3770.737 0.052
3790.727 0.168
3794.687 0.081
3795.719 0.056
3806.698 0.148
3834.629 0.178
3849.680 0.039
3855.623 0.152
3870.614 -0.005
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