COMMISSIONS 27 AND 42 OF THE IAU INFORMATION BULLETIN ON VARIABLE STARS Number 4012 Konkoly Observatory Budapest 7 April 1994 HU ISSN 0374 - 0676 PHOTOMETRY OF KR AURIGAE 1985-1988^1 KR Aurigae is a well known prototype of the antidwarf novae class of nova-like variables. Our program for extensive research of variables of this type includes a photometric patrol in B-color of KR Aur in order to continue the long set of already existing observations for construction of long-term light curve of the object. The photometric data, total number 102, obtained in the time interval between JD 2446300, and 2447231 at the NAO "Rozhen" of Bulgarian Academy of Sciences are presented in Figure 1 and Table 1. Observations were made with the 50/70 cm Schmidt, 60-cm Cassegrain and 2-m RCC telescopes. The magnitudes are based on standard stars published by Popova (1965). Two fadings in the brightness have been observed in this three year period. The greatest observed magnitudes are 15.23 and 15.10. The data published by Gotz ( 1986, 1987) show similar values. It seems that these minima are not as deep as one observed at the end of 1981 (Popov, 1982). It is worth mentioning the remarkable stability of the high state of brightness for more than 400 days since JD 2446557. [FIGURE 1] Table 1 J.D.244... m J.D.244... m J.D.244... m 6300.581 13.78 442.392 14.42 444.416 13.80 .589 13.66 .406 14.05 .423 13.82 301.588 13.60 .465 14.40 .438 13.74 302.571 13.64 444.256 13.86 .445 13.82 303.564 13.56 .274 13.86 .452 13.74 304.580 13.61 .282 13.84 .482 13.66 320.528 13.33 .290 13.86 .588 13.85 .566 13.00 .300 13.84 .591 13.82 325.573 13.50 .319 13.87 .619 13.89 347.526 14.44 .328 13.84 .647 13.74 348.543 14.50 .399 13.74 .653 13.74 398.602 15.23 .409 13.82 .660 13.74 .675 13.82 677.510 13.20 .538 13.22 .682 13.80 712.618 13.05 .541 13.10 .689 13.82 737.523 12.90 033.598 12.99 445.295 13.46 .613 13.03 034.573 12.79 .328 13.50 765.563 12.85 040.575 13.44 .361 13.46 797.463 13.08 052.557 13.49 .366 13.46 818.232 13.10 .563 13.38 .370 13.42 .226 13.06 .568 13.55 375 13.45 821.210 13.37 060.603 13.66 .380 13.46 .220 13.42 085.552 13.70 .385 13.40 834.263 12.99 092.579 13.33 .411 13.33 .269 13.05 123.458 13.10 528.345 13.48 854.262 13.06 128.410 13.00 .355 13.4: .269 13.06 128.508 13.15 .364 13.44 881.293 13.05 155.358 12.75 529.423 13.46 .310 13.22 155.378 12.62 530.437 13.40 .317 13.16 156.360 12.78 531.398 13.33 910.322 13.50 206.479 15.0: 531.412 13.33 911.326 13.0: .496 15.10 557.412 13.10 932.319 13.40 229.352 13.2: 559.438 12.98 .325 13.20 .394 13.00 676.500 12.95 7031.535 13.21 232.391 13.30 V. POPOV, Z. KRAICHEVA, A. ANTOV Department of Astronomy, Bulgarian Academy of Sciences 72 Trakia Bldv.,1784 Sofia, Bulgaria bgearn @ gstar.bitnet References: Gotz, W., 1986, IBVS, No. 2896 Gotz, W., 1987, IBVS, No. 3194 Popova, M. D., 1965, Peremennye Zvezdi, 15, 534 [BIBCODE 1965PZ.....15..534P ] Popov, V., 1982, IBVS, No. 4082 ^1 This work was partially supported by grant No. 346/93 of the Bulgarian ministry of Science and Higher Education