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Visual observations of eclipsing binaries and cepheids in the years 1992-1996

Petr Molik

Petrin Hill Observatory, Strahovska 205, 118 46 Prague 1, Czech Republic

In this paper I present results of my visual observations of eclipsing binary stars and cepheids carried out in the years 1992-1996. In the years 1992-1993 (a few observations were obtained also in the year 1964) I observed eclipsing binaries at my home at the town of Sobeslav (South Bohemia) and in 1994-1996 at the Petrin Hill Observatory in Prague. All these observations were done visually by the Argelander step method (1964, 1992-1993) and its Nijland-Blazhko modification (1994-1996).

At the Sobeslav observing site I used an old binocular 6 x 45 (1964), two modern prismatic binoculars, 8 x 30 and 16 x 50, and a prismatic monocular Sport 25 x 70 (1992-1993). In all these instruments the first number means magnifying power and the second one the diameter of object lens in millimetres. At the Petrin Hill Observatory the observations were mostly done with the use of the 0.20 m refractor in the observation room with sliding roof, sometimes with the 0.35 m Maksutov-Cassegrain telescope in the western dome, and only on single nights with the 0.18 m refractor in the main dome and the 0.30 m refractor at the Kle subsidiary station. Notes on observing conditions during individual nights are presented here.

Altogether 81 variable stars were observed by me of which 76 were eclipsing binaries and the remaining 5 were cepheids (U Aql, eta Aql, RT Aur, SU Cas, and X Cyg). Total number of estimates of variable stars amounted to 10238. Another 111 estimates of brightness of comparison stars were done. The following table contains a list of observed variable stars. By clicking on the name of any of these stars individual data concerning given star can be retreived. The data is arranged in the following order: Name of the star, observing site, telescope or telescopes used, the source of finding chart and comparison stars, identifications of the variable and the comparison stars (identifications are not given for stars observed with the use of the standard B.R.N.O. finding charts), yearly and total numbers of estimates, date and geocentric universal time of observation, estimate.

Star name          1964   1992   1993   1994   1995   1996        Total

RT And -- -- -- 419 256 39 714 TW And -- -- -- 67 -- -- 67 CO And -- -- -- 56 12 -- 68 RY Aqr -- -- -- 1 -- -- 1 HV Aqr -- -- -- -- 192 -- 192

U Aql -- 9 23 -- -- -- 32 V346 Aql -- -- -- 141 134 -- 275 V602 Aql -- -- -- -- 6 -- 6 eta Aql 4 18 33 -- -- -- 55 RT Aur -- 12 57 -- -- -- 69

TT Aur -- -- -- 88 6 -- 94 WW Aur -- 23 63 -- -- -- 86 AR Aur -- 31 43 -- -- -- 74 UW Boo -- -- -- -- 38 -- 38 CV Boo -- -- -- -- 16 -- 16

SV Cam -- -- 74 207 187 71 539 AG CMi -- -- -- 17 -- -- 17 RZ Cas -- 55 248 -- -- -- 303 SU Cas -- 25 109 93 68 7 302 SX Cas -- -- -- 27 25 -- 52

TV Cas -- -- 48 -- -- -- 48 TW Cas -- -- 24 77 16 -- 117 BZ Cas -- -- -- 19 6 -- 25 MM Cas -- -- -- 20 13 -- 33 PV Cas -- -- -- -- 7 -- 7

U Cep -- 35 72 -- -- -- 107 XX Cep -- -- -- -- 18 -- 18 XZ Cep -- -- -- 38 -- -- 38 ZZ Cep -- -- -- 58 28 -- 86 EK Cep -- -- -- 36 -- -- 36

SS Cet -- -- -- 35 -- -- 35 U CrB -- -- 27 -- -- -- 27 X Cyg -- 3 36 -- -- -- 39 Y Cyg -- 5 6 -- -- -- 11 MY Cyg -- -- 76 -- 86 -- 162

V367 Cyg -- 3 35 -- -- -- 38 V477 Cyg -- -- -- 65 18 47 130 V995 Cyg -- -- -- -- 19 -- 19 V1034 Cyg -- -- -- -- 58 -- 58 W Del -- -- -- 40 -- -- 40

DM Del -- -- 45 343 50 -- 438 AI Dra -- -- 81 -- -- -- 81 BH Dra -- -- -- 90 19 -- 109 EF Dra -- -- -- -- 187 214 401 S Equ -- -- -- 58 -- -- 58

WX Eri = V1241 Tau -- -- -- 51 -- -- 51 SX Gem -- -- -- 56 6 -- 62 Note on SX Gem: in 1994 another 2 estimates between comparison stars. AY Gem -- -- -- 5 -- -- 5 RX Her -- -- 3 -- -- -- 3 TX Her -- -- 48 33 42 -- 123

UX Her -- -- -- 22 1 -- 23 AK Her -- -- -- -- 172 40 212 MX Her -- -- -- 21 -- -- 21 UV Leo -- -- -- -- 68 65 133 VZ Leo -- -- -- 2 -- -- 2

XY Leo -- -- -- -- -- 46 46 beta Lyr 4 18 52 -- -- -- 74 BO Mon -- -- -- 55 24 -- 79 IL Mon -- -- -- 59 49 -- 108 Note on IL Mon: another 109 estimates between comparison stars, (62 in 1994 and 47 in 1995). One of the comparison stars is probably variable. U Oph -- -- 86 -- -- -- 86

SX Oph -- -- -- -- 16 -- 16 V566 Oph -- -- 57 20 73 -- 150 V839 Oph (Part 1) -- -- -- 942 1302 615 2859 (Part 2),(Part 3) BM Ori -- -- -- 21 -- -- 21 EQ Ori -- -- -- 18 -- -- 18

ET Ori -- -- -- 11 -- -- 11 AT Peg -- -- -- 55 69 -- 124 BG Peg -- -- -- 10 -- -- 10 Z Per -- -- -- 28 -- -- 28 RV Per -- -- -- 19 -- -- 19

SZ Psc -- -- 12 -- -- -- 12 AO Ser -- -- -- -- 23 -- 23 EG Ser -- -- -- -- 25 -- 25 RW Tau -- -- 5 -- -- -- 5 AM Tau -- -- -- 29 -- -- 29

V726 Tau -- -- -- 46 8 -- 54 V781 Tau -- -- -- -- -- 77 77 TW UMa -- -- -- -- 23 -- 23 W UMi -- -- -- 285 159 -- 444 RS UMi -- -- -- 79 -- -- 79

Z Vul -- -- 22 -- -- -- 22

Total 8 237 1385 3862 3525 1221 10238

From the data on eclipsing binaries presented here the following 360 times of minimum light were obtained by the author. The times of minima were determined with the use of a computer version of the tracing paper method. Almost in all cases of superposition (folding) of observations from two or more nights the instant light elements valid for given observing season were used.

Star name   Heliocentric  Method   Observer   Note
            Julian Date
            (-2400000)

RT And 49537.471 vis P.Molik RT And 49547.535 vis P.Molik RT And 49559.479 vis P.Molik RT And 49564.512 vis P.Molik RT And 49569.539 vis P.Molik RT And 49574.576 vis P.Molik RT And 49581.488 vis P.Molik RT And 49591.559 vis P.Molik RT And 49605.391 vis P.Molik RT And 49612.306 vis P.Molik RT And 49615.456 vis P.Molik RT And 49618.599 vis P.Molik RT And 49620.489 vis P.Molik RT And 49623.635 vis P.Molik RT And 49624.261 vis P.Molik superposition (Aug 11-12, Sep 28-29, Oct 19-20, 1994) RT And 49625.517 vis P.Molik RT And 49630.551 vis P.Molik RT And 49632.441 vis P.Molik RT And 49639.353 vis P.Molik RT And 49644.379 vis P.Molik RT And 49646.273 vis P.Molik RT And 49652.559 vis P.Molik RT And 49661.366 vis P.Molik RT And 49673.314 vis P.Molik RT And 49688.412 vis P.Molik RT And 49830.546 vis P.Molik RT And 49898.475 vis P.Molik RT And 49920.487 vis P.Molik RT And 49925.520 vis P.Molik RT And 49932.435 vis P.Molik RT And 49935.579 vis P.Molik RT And 49939.352 vis P.Molik RT And 49942.496 vis P.Molik RT And 49952.564 vis P.Molik RT And 49978.353 vis P.Molik RT And 50017.344 vis P.Molik low accuracy RT And 50191.555 vis P.Molik RT And 50242.502 vis P.Molik

TW And 49632.410 vis P.Molik superposition (September 3-4, October 6-7, October 10-11, 1994)

CO And 49639.409 vis P.Molik CO And 49659.503 vis P.Molik superposition (July 28-29, November 2-3, 1994) CO And 49661.330 vis P.Molik CO And 49977.514 vis P.Molik superposition (November 15-16, 1994, September 16-17, 1995)

HV Aqr 49934.625 vis P.Molik superposition (August 4-5, September 17-18, 1995) HV Aqr 49935.550 vis P.Molik HV Aqr 49983.481 vis P.Molik HV Aqr 49989.490 vis P.Molik HV Aqr 49999.386 vis P.Molik HV Aqr 50000.341 vis P.Molik HV Aqr 50015.325 vis P.Molik HV Aqr 50017.379 vis P.Molik superposition (October 4-5, 26-27, 1995)

V346 Aql 49565.562 vis P.Molik V346 Aql 49574.415 vis P.Molik V346 Aql 49594.328 vis P.Molik V346 Aql 49605.393 vis P.Molik V346 Aql 49636.371 vis P.Molik V346 Aql 49646.327 vis P.Molik V346 Aql 49866.493 vis P.Molik V346 Aql 49897.471 vis P.Molik V346 Aql 49907.427 vis P.Molik V346 Aql 49918.490 vis P.Molik V346 Aql 49939.513 vis P.Molik

TT Aur 49605.512 vis P.Molik TT Aur 49625.506 vis P.Molik TT Aur 49645.499 vis P.Molik TT Aur 49661.499 vis P.Molik TT Aur 49785.432 vis P.Molik superposition (August 16-17, 1994, March 8-9, 1995)

WW Aur 48985.711 vis P.Molik superposition (December 23-24, 28-29, 1992) WW Aur 49018.542 vis P.Molik

AR Aur 49005.536 vis P.Molik AR Aur 49061.368 vis P.Molik

UW Boo 49811.450 vis P.Molik UW Boo 49830.531 vis P.Molik

CV Boo 49866.413 vis P.Molik

SV Cam 49102.395 vis P.Molik SV Cam 49109.497 vis P.Molik SV Cam 49214.493 vis P.Molik SV Cam 49536.521 vis P.Molik SV Cam 49539.497 vis P.Molik superposition (July 5-6, November 15-16, 1994) SV Cam 49545.429 vis P.Molik superposition (July 11-12, July 14-15, 1994) SV Cam 49558.472 vis P.Molik SV Cam 49564.409 vis P.Molik SV Cam 49580.411 vis P.Molik SV Cam 49661.663 vis P.Molik SV Cam 49673.536 vis P.Molik SV Cam 49692.506 vis P.Molik SV Cam 49693.685 vis P.Molik SV Cam 49778.491 vis P.Molik SV Cam 49842.556 vis P.Molik SV Cam 49896.527 vis P.Molik SV Cam 49899.489 vis P.Molik SV Cam 49915.505 vis P.Molik SV Cam 49918.470 vis P.Molik SV Cam 49924.405 vis P.Molik SV Cam 49989.638 vis P.Molik superposition (June 29-30, September 28-29, 1995) SV Cam 50189.504 vis P.Molik SV Cam 50195.434 vis P.Molik

RZ Cas 48985.319 vis P.Molik superposition (December 23-24, 28-29, 1992) RZ Cas 48991.294 vis P.Molik RZ Cas 49004.439 vis P.Molik superposition (January 16-17, 17-18, 1993) RZ Cas 49059.420 vis P.Molik RZ Cas 49060.618 vis P.Molik RZ Cas 49066.593 vis P.Molik RZ Cas 49102.451 vis P.Molik RZ Cas 49108.423 vis P.Molik RZ Cas 49157.432 vis P.Molik superposition (May 1-2, June 18-19, 1993) RZ Cas 49194.485 vis P.Molik superposition (July 25-26, August 7-8, 1993) RZ Cas 49200.457 vis P.Molik RZ Cas 49206.436 vis P.Molik RZ Cas 49213.614 vis P.Molik superposition (July 24-25, August 13-14, 1993)

TV Cas 49206.453 vis P.Molik TV Cas 49215.511 vis P.Molik superposition (June 18-19, August 15-16, 1993)

TW Cas 49221.453 vis P.Molik TW Cas 49568.506 vis P.Molik TW Cas 49628.453 vis P.Molik low accuracy TW Cas 49658.492 vis P.Molik low accuracy TW Cas 49661.341 vis P.Molik low accuracy TW Cas 49688.487 vis P.Molik low accuracy TW Cas 49778.461 vis P.Molik low accuracy

BZ Cas 49630.547 vis P.Molik low accuracy

MM Cas 49693.575 vis P.Molik superposition (December 6-7, 1994, January 4-5, 1995)

U Cep 48934.409 vis P.Molik superposition (October 18-19, November 7-8, 1992) U Cep 48989.259 vis P.Molik superposition (November 27-28, 1992, January 1-2, 1993) U Cep 49066.535 vis P.Molik U Cep 49101.444 vis P.Molik

XX Cep 49923.481 vis P.Molik

XZ Cep 49623.485 vis P.Molik superposition (September 27-28, October 2-3, 1994)

ZZ Cep 49605.611 vis P.Molik superposition (July 24-25, September 9-10, 1994) ZZ Cep 49618.458 vis P.Molik ZZ Cep 49920.459 vis P.Molik

EK Cep 49567.445 vis P.Molik EK Cep 49620.582 vis P.Molik low accuracy

SS Cet 49612.641 vis P.Molik superposition (September 16-17, October 13-14, 1994) SS Cet 49630.488 vis P.Molik

U CrB 49122.778 vis P.Molik superposition (four nights)

MY Cyg 49201.472 vis P.Molik superposition (July 24-25, August 1-2, 1993) MY Cyg 49207.483 vis P.Molik MY Cyg 49213.496 vis P.Molik MY Cyg 49215.497 vis P.Molik superposition (July 30-31, August 15-16, 1993) MY Cyg 49221.520 vis P.Molik MY Cyg 49918.442 vis P.Molik MY Cyg 49920.421 vis P.Molik MY Cyg 49924.437 vis P.Molik MY Cyg 49942.452 vis P.Molik

V367 Cyg 49117.140 vis P.Molik superposition (17 nights) V367 Cyg 49200.378 vis P.Molik superposition (19 nights)

V477 Cyg 49568.564 vis P.Molik V477 Cyg 49594.378 vis P.Molik V477 Cyg 49615.501 vis P.Molik V477 Cyg 49688.265 vis P.Molik V477 Cyg 49906.525 vis P.Molik V477 Cyg 50197.546 vis P.Molik V477 Cyg 50244.491 vis P.Molik

V1034 Cyg 49923.498 vis P.Molik V1034 Cyg 49924.483 vis P.Molik V1034 Cyg 49925.463 vis P.Molik

W Del 49600.498 vis P.Molik superposition (August 16-17, September 4-5, September 9-10, 1994)

DM Del 49199.431 vis P.Molik superposition (eight nights) DM Del 49221.402 vis P.Molik superposition (August 15-16, August 21-22, 1993) DM Del 49547.424 vis P.Molik low accuracy DM Del 49563.486 vis P.Molik superposition (July 24-25, July 29-30, 1994) DM Del 49568.543 vis P.Molik DM Del 49569.402 vis P.Molik DM Del 49574.463 vis P.Molik DM Del 49612.455 vis P.Molik DM Del 49618.390 vis P.Molik DM Del 49623.459 vis P.Molik superposition (Sep 27-28, 28-29, 1994, Jul 7-8, 1995) DM Del 49634.422 vis P.Molik DM Del 49645.414 vis P.Molik superposition (October 19-20, October 20-21, 1994) DM Del 49673.298 vis P.Molik DM Del 49977.371 vis P.Molik

AI Dra 49109.482 vis P.Molik AI Dra 49193.412 vis P.Molik AI Dra 49199.393 vis P.Molik AI Dra 49206.580 vis P.Molik

BH Dra 49618.452 vis P.Molik BH Dra 49658.427 vis P.Molik BH Dra 49896.486 vis P.Molik

EF Dra 49995.376 vis P.Molik mean (Aug 11-12, Sep 28-29, Oct 4-5, 10-11, 24-25, 1995) EF Dra 49999.405 vis P.Molik mean (Aug 18-19, Oct 8-9, 9-10, 26-27, 1995) EF Dra 50180.457 vis P.Molik mean (April 6-7, April 17-18, 1996) EF Dra 50189.573 vis P.Molik superposition (April 7-8, April 15-16, 1996) EF Dra 50195.505 vis P.Molik

S Equ 49630.485 vis P.Molik superposition (September 3-4, October 4-5, October 18-19, 1994)

WX Eri 49673.549 vis P.Molik WX Eri 49688.367 vis P.Molik WX Eri 49692.490 vis P.Molik

SX Gem 49702.580 vis P.Molik SX Gem 49989.620 vis P.Molik superposition (October 5-6, 1994, September 28-29, 1995)

TX Her 49171.434 vis P.Molik superposition (July 2-3, July 9-10, 1993) TX Her 49206.460 vis P.Molik TX Her 49207.485 vis P.Molik TX Her 49481.438 vis P.Molik TX Her 49484.499 vis P.Molik TX Her 49897.509 vis P.Molik TX Her 49932.526 vis P.Molik

UX Her 49580.387 vis P.Molik

AK Her 49872.497 vis P.Molik low accuracy AK Her 49896.518 vis P.Molik AK Her 49906.427 vis P.Molik AK Her 49907.491 vis P.Molik AK Her 49918.447 vis P.Molik AK Her 49923.507 vis P.Molik AK Her 49942.475 vis P.Molik AK Her 49978.305 vis P.Molik AK Her 50013.284 vis P.Molik AK Her 50191.588 vis P.Molik AK Her 50197.489 vis P.Molik

MX Her 49480.486 vis P.Molik superposition (May 7-8, July 14-15, 1994)

UV Leo 49785.347 vis P.Molik UV Leo 49811.446 vis P.Molik UV Leo 49830.350 vis P.Molik UV Leo 50180.508 vis P.Molik UV Leo 50181.402 vis P.Molik UV Leo 50189.507 vis P.Molik

XY Leo 50191.487 vis P.Molik

beta Lyr 49081.128 vis P.Molik superposition (14 nights) beta Lyr 49171.679 vis P.Molik superposition (19 nights)

BO Mon 49693.633 vis P.Molik BO Mon 49702.534 vis P.Molik BO Mon 49722.560 vis P.Molik

IL Mon 49678.718 vis P.Molik superposition (November 1-2, November 21-22, 1994) IL Mon 49783.402 vis P.Molik

U Oph 49178.378 vis P.Molik superposition (July 2-3, July 9-10, 1993) U Oph 49193.478 vis P.Molik superposition (July 24-25, August 15-16, 1993) U Oph 49214.444 vis P.Molik superposition (July 30-31, August 14-15, 1993)

SX Oph 49889.484 vis P.Molik

V566 Oph 49200.489 vis P.Molik V566 Oph 49207.451 vis P.Molik V566 Oph 49214.428 vis P.Molik

V839 Oph 49486.518 vis P.Molik V839 Oph 49536.393 vis P.Molik superposition (July 2-3, 1994, two minima) V839 Oph 49537.416 vis P.Molik V839 Oph 49539.464 vis P.Molik superposition (July 5-6, July 11-12, 1994) V839 Oph 49543.563 vis P.Molik V839 Oph 49545.393 vis P.Molik V839 Oph 49547.437 vis P.Molik V839 Oph 49548.469 vis P.Molik V839 Oph 49550.500 vis P.Molik V839 Oph 49558.485 vis P.Molik V839 Oph 49559.502 vis P.Molik V839 Oph 49562.371 vis P.Molik V839 Oph 49563.396 vis P.Molik V839 Oph 49564.418 vis P.Molik V839 Oph 49565.436 vis P.Molik V839 Oph 49567.476 vis P.Molik V839 Oph 49568.496 vis P.Molik V839 Oph 49569.518 vis P.Molik V839 Oph 49574.430 vis P.Molik V839 Oph 49576.480 vis P.Molik superposition (August 11-12, August 12-13, 1994) V839 Oph 49580.368 vis P.Molik V839 Oph 49581.386 vis P.Molik V839 Oph 49587.318 vis P.Molik V839 Oph 49591.403 vis P.Molik V839 Oph 49592.435 vis P.Molik V839 Oph 49594.480 vis P.Molik V839 Oph 49599.377 vis P.Molik V839 Oph 49600.399 vis P.Molik superposition (August 24-25, September 4-5, 1994) V839 Oph 49605.309 vis P.Molik V839 Oph 49612.266 vis P.Molik superposition (September 16-17, 1994, two minima) V839 Oph 49618.390 vis P.Molik V839 Oph 49619.417 vis P.Molik V839 Oph 49623.309 vis P.Molik V839 Oph 49624.325 vis P.Molik superposition (September 28-29, November 16-17, 1994) V839 Oph 49625.352 vis P.Molik V839 Oph 49639.249 vis P.Molik V839 Oph 49783.632 vis P.Molik V839 Oph 49830.469 vis P.Molik V839 Oph 49840.486 vis P.Molik V839 Oph 49842.531 vis P.Molik V839 Oph 49843.549 vis P.Molik V839 Oph 49853.572 vis P.Molik V839 Oph 49866.457 vis P.Molik V839 Oph 49872.382 vis P.Molik V839 Oph 49889.563 vis P.Molik V839 Oph 49896.520 vis P.Molik V839 Oph 49897.544 vis P.Molik V839 Oph 49898.369 vis P.Molik superposition (June 29-30, June 30-July 1, 1995) V839 Oph 49898.561 vis P.Molik V839 Oph 49899.389 vis P.Molik V839 Oph 49900.404 vis P.Molik V839 Oph 49906.540 vis P.Molik V839 Oph 49907.560 vis P.Molik V839 Oph 49909.409 vis P.Molik V839 Oph 49915.542 vis P.Molik V839 Oph 49918.411 vis P.Molik V839 Oph 49920.451 vis P.Molik V839 Oph 49923.515 vis P.Molik V839 Oph 49924.538 vis P.Molik V839 Oph 49925.359 vis P.Molik V839 Oph 49925.569 vis P.Molik V839 Oph 49932.522 vis P.Molik V839 Oph 49934.356 vis P.Molik V839 Oph 49935.375 vis P.Molik V839 Oph 49936.400 vis P.Molik V839 Oph 49939.463 vis P.Molik V839 Oph 49941.505 vis P.Molik V839 Oph 49942.528 vis P.Molik V839 Oph 49948.455 vis P.Molik V839 Oph 49953.361 vis P.Molik V839 Oph 49977.297 vis P.Molik V839 Oph 49978.322 vis P.Molik V839 Oph 49995.296 vis P.Molik V839 Oph 50002.247 vis P.Molik V839 Oph 50013.290 vis P.Molik V839 Oph 50180.569 vis P.Molik V839 Oph 50181.591 vis P.Molik V839 Oph 50189.564 vis P.Molik V839 Oph 50191.613 vis P.Molik V839 Oph 50195.501 vis P.Molik V839 Oph 50197.541 vis P.Molik V839 Oph 50242.536 vis P.Molik V839 Oph 50243.555 vis P.Molik V839 Oph 50244.377 vis P.Molik V839 Oph 50245.400 vis P.Molik V839 Oph 50246.421 vis P.Molik V839 Oph 50248.469 vis P.Molik V839 Oph 50249.488 vis P.Molik

BM Ori 49673.463 vis P.Molik superposition (November 16-17, December 5-6, 1994)

EQ Ori 49632.633 vis P.Molik

ET Ori 49644.629 vis P.Molik

AT Peg 49618.497 vis P.Molik AT Peg 49625.369 vis P.Molik AT Peg 49679.230 vis P.Molik low accuracy AT Peg 49932.514 vis P.Molik AT Peg 49978.356 vis P.Molik AT Peg 50017.329 vis P.Molik

Z Per 49632.353 vis P.Molik superposition (September 30-October 1, October 6-7, October 18-19, 1994)

RV Per 49658.677 vis P.Molik superposition (September 3-4, November 1-2, November 15-16, 1994)

AO Ser 49840.388 vis P.Molik

EG Ser 49898.401 vis P.Molik superposition (May 15-16, June 29-30, 1995)

AM Tau 49678.511 vis P.Molik

V726 Tau 49688.607 vis P.Molik superposition (Nov 1-2, Nov 21-22, Dec 1-2, Dec 5-6, 1994, Jan 4-5, 1995) V726 Tau 49702.454 vis P.Molik superposition (October 20-21, October 26-27, December 15-16, 1994)

V781 Tau 50105.370 vis P.Molik low accuracy V781 Tau 50180.399 vis P.Molik V781 Tau 50181.274 vis P.Molik low accuracy, superposition (April 7-8, April 21-22, 1996)

TW UMa 49837.427 vis P.Molik

W UMi 49545.522 vis P.Molik superposition (July 11-12, July 13-14, 1994) W UMi 49567.638 vis P.Molik superposition (August 2-3, October 6-7, 1994) W UMi 49574.446 vis P.Molik W UMi 49591.454 vis P.Molik W UMi 49620.367 vis P.Molik superposition (September 24-25, September 27-28, 1994) W UMi 49625.476 vis P.Molik W UMi 49630.580 vis P.Molik W UMi 49659.497 vis P.Molik superposition (October 26-27, November 2-3, 1994) W UMi 49688.417 vis P.Molik W UMi 49778.576 vis P.Molik superposition (November 4-5, 1994, March 1-2, 1995) W UMi 49785.369 vis P.Molik superposition (March 8-9, March 20-21, 1995) W UMi 49843.237 vis P.Molik superposition (December 18-19, 1994, May 5-6, 1995) W UMi 49853.421 vis P.Molik W UMi 49909.568 vis P.Molik superposition (June 30-July 1, July 10-11, 1995) W UMi 49989.535 vis P.Molik W UMi 50013.335 vis P.Molik

RS UMi 49543.641 vis P.Molik superposition (July 9-10, July 28-29, September 3-4, 1994) RS UMi 49574.474 vis P.Molik RS UMi 49580.657 vis P.Molik superposition (August 3-4, August 15-16, 1994) RS UMi 49679.284 vis P.Molik low accuracy

Z Vul 49158.454 vis P.Molik Z Vul 49207.537 vis P.Molik

SHON - Contents:

Czech Corner: Some reading for those who like it in Czech.
Economic affairs:

.

Comparison of buying power of Czech and Tararingapatam astronomers, comparison of important astronomical and economic indicators.
Discussion:

.

"The phenomenon of anti-flares in eclipsing binaries of the W UMa-type", a communication by Dr. P. Molik submitted to the IBVS, reply of Dr. L. Szabados, co-editor of the IBVS, reply of Dr. P. Molik.
Papers:

.

.

.

.

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P. Molik, A. Paschke: Eclipsing binary DX Aqr. Brief note intended as a poster paper for the GEOS symposium (Campo Blenio, Switzerland, 30th May - 1st June, 1998).

P. Molik: Orbital Period and Light Curve Changes in the Eclipsing Binary V839 Ophiuchi.

P. Molik: The phenomenon of "anti-flares" in eclipsing binaries of the W UMa-type.

P. Molik: Period and Light Curve Analysis of the Eclipsing Binary IL Monocerotis.

P. Molik: New probably variable in Monoceros - GSC 4837.0908.

Directory: J. Sosacek: Directory of astronomers engaged in the research of eclipsing binaries.
Observational data: P. Molik: Visual observations of eclipsing binaries and cepheids in the years 1992-1996.
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