#IBVS 2074-t1.txt
#IBVS 2246-t89.txt
#IAU COMMISSION 27 UNPUBLISHED DATA FILE 089E
#IBVSdataKey: photometry
#Object: 44 Boo

IAU COMMISSION 27                      UNPUBLISHED DATA FILE 089E
3 pages including cover sheet                         December, 18, 1981


PHOTOELECTRIC LIGHT CURVE OF 44 BOOTES


A complete light curve of the W UMa-type eclipsing binary 44 Boo
was obtained on the night of 8-9 May, 1982. The observations
were made on the No. 3 40cm telescope at Kitt Peak National
Observatory. A dry-ice cooled 1P21 photomultiplier and
pulse-counting system were used to make the observations in the 
V band of the UBV system. Observations were made relative to the
comparison star 47 Boo.

Observations of the close pair 27/28 LMi provided data for
transformation to the standard UBV system. Analysis of the
comparison star magnitude versus air mass provided a measure of
extinction. Observational times were calibrated with respect to
radio station WWV to within 0.1 seconds. All integrations were of
10 seconds duration, and the observations were made in the 
following order: 6 of the comparison star; 3 of the comparison
star background; 60 of the variable star; and 3 of the variable 
star background; etc. A neutral density filter was used to limit
the maximum counts to aproximately 200,000 for the 10-second
integrations.

The data were reduced at the Fairborn Observatory using the
BASIC program described by Genet (1980). This include correction
for differential extinction, transformation to the standard
system and heliocentric correction of the observational times.
Approximately 1500 10-second observations of the variable star
were made in about seven hours. These data were grouped, and mean
counts for each seven observations were used in the analysis. The
phase was calculated using the ephemeris of van't Veer (1972).

Pr. Min. = Hel. J.D. 2439370.4222 + 0.2678160 E

The resultant light curve is shown in the figure. The data
are given in the table. The persistance of certain irregularities
in the light curve are being examined with respect to
observations made on nights prior to and subsequent to the
night's observations reported herein.

References:
Genet, R. M.: 1980, IAPPP Communications, 2, 23.
van't Veer, F.: 1972, Astron. and Astrophys., 20, 131.

R. M. Genet
Fairborn Observatory
1247 Folk Road
Fairborn, Ohio
USA

K. E. Kissell
2202 Malton Ave.
Simi Valley
California
93063 USA

G. C. Roberts
9625 Bellanca Ave.
Los Angeles
California
90045 USA

****************************************************************

%UDF#89
%STAR 44 BOO
%COMP 47 BOO
%AUTH Genet R.M., et al.
%PHASE:  2439370.4222 + 0.2678160 E

%LIEU Kitt Peak National Observatory
%OBS Genet R.M., et al.
%DATE 1981
%TYPE Relative
%HEAD Phase DV
0.8156 -0.8656
0.8280 -0.8637
0.8400 -0.8566
0.8649 -0.8408
0.8773 -0.8436
0.9070 -0.8124
0.9194 -0.8066
0.9418 -0.7765
0.9543 -0.7629
0.9796 -0.7349
0.9921 -0.7323
0.0045 -0.7253
0.0160 -0.7294
0.0382 -0.7309
0.0506 -0.7439
0.0754 -0.7750
0.0878 -0.7900
0.1135 -0.8152
0.1260 -0.8285
0.1549 -0.8446
0.1673 -0.8471
0.1798 -0.8527
0.2049 -0.8637
0.2174 -0.8673
0.2422 -0.8789
0.2546 -0.8773
0.2795 -0.8704
0.2951 -0.8701
0.3185 -0.8675
0.3309 -0.8654
0.3527 -0.8510
0.3651 -0.8464
0.3771 -0.8443
0.3990 -0.8256
0.4119 -0.8133
0.4357 -0.7893
0.4482 -0.7764
0.4750 -0.7474
0.4879 -0.7429
0.5133 -0.7390
0.5267 -0.7473
0.5505 -0.7607
0.5629 -0.7753
0.5753 -0.7958
0.6005 -0.8123
0.6130 -0.8226
0.6370 -0.8356
0.6494 -0.8463
0.6750 -0.8665
0.6874 -0.8696
0.7114 -0.8695
0.7238 -0.8730
0.7482 -0.8770
0.7607 -0.8830
0.8187 -0.8644
0.8311 -0.8636
0.8556 -0.8434
0.8680 -0.8369
0.8795 -0.8352
0.9101 -0.8151
0.9225 -0.8049
0.9450 -0.7723
0.9574 -0.7568
0.9827 -0.7329
0.9951 -0.7285
0.0076 -0.7244
0.0289 -0.7236
0.0413 -0.7309
0.0528 -0.7485
0.0785 -0.7758
0.0909 -0.7951
0.1166 -0.8186
0.1291 -0.8280
0.1579 -0.8452
0.1704 -0.8490
0.1832 -0.8585
0.2080 -0.8658
0.2205 -0.8671
0.2454 -0.8775
0.2578 -0.8780
0.2857 -0.8701
0.2982 -0.8695
0.3216 -0.8657
0.3340 -0.8636
0.3558 -0.8457
0.3682 -0.8443
0.3897 -0.8298
0.4021 -0.8241
0.4264 -0.7968
0.4388 -0.7817
0.4517 -0.7722
0.4785 -0.7466
0.4909 -0.7432
0.5164 -0.7423
0.5290 -0.7493
0.5536 -0.7668
0.5660 -0.7815
0.5912 -0.8040
0.6036 -0.8165
0.6152 -0.8244
0.6401 -0.8387
0.6529 -0.8477
0.6781 -0.8660
0.6905 -0.8710
0.7145 -0.8692
0.7269 -0.8733
0.7513 -0.8823
0.7637 -0.8866
0.8218 -0.8650
0.8342 -0.8618
0.8587 -0.8468
0.8711 -0.8424
0.9008 -0.8163
0.9132 -0.8098
0.9252 -0.8058
0.9481 -0.7711
0.9605 -0.7533
0.9858 -0.7277
0.9982 -0.7250
0.0107 -0.7276
0.0320 -0.7249
0.0444 -0.7329
0.0692 -0.7681
0.0817 -0.7783
0.0941 -0.7991
0.1197 -0.8242
0.1322 -0.8333
0.1612 -0.8475
0.1735 -0.8503
0.1987 -0.8598
0.2111 -0.8657
0.2240 -0.8672
0.2485 -0.8793
0.2613 -0.8777
0.2888 -0.8716
0.3017 -0.8697
0.3247 -0.8660
0.3371 -0.8651
0.3589 -0.8467
0.3713 -0.8449
0.3928 -0.8268
0.4052 -0.8200
0.4295 -0.7929
0.4419 -0.7779
0.4688 -0.7530
0.4817 -0.7457
0.4936 -0.7427
0.5195 -0.7435
0.5329 -0.7481
0.5567 -0.7684
0.5691 -0.7888
0.5943 -0.8090
0.6067 -0.8192
0.6308 -0.8338
0.6432 -0.8402
0.6688 -0.8608
0.6812 -0.8682
0.6927 -0.8749
0.7176 -0.8674
0.7305 -0.8768
0.7544 -0.8823
0.7668 -0.8848
0.8249 -0.8667
0.8374 -0.8631
0.8618 -0.8438
0.8742 -0.8423
0.9039 -0.8161
0.9163 -0.8071
0.9387 -0.7800
0.9511 -0.7675
0.9636 -0.7497
0.9890 -0.7299
0.0014 -0.7255
0.0138 -0.7263
0.0351 -0.7291
0.0475 -0.7449
0.0723 -0.7727
0.0847 -0.7869
0.1104 -0.8161
0.1228 -0.8261
0.1357 -0.8376
0.1642 -0.8484
0.1766 -0.8550
0.2018 -0.8596
0.2142 -0.8632
0.2391 -0.8773
0.2516 -0.8789
0.2764 -0.8704
0.2919 -0.8728
0.3154 -0.8681
0.3278 -0.8662
0.3398 -0.8623
0.3620 -0.8508
0.3744 -0.8421
0.3959 -0.8258
0.4083 -0.8176
0.4326 -0.7914
0.4451 -0.7778
0.4719 -0.7527
0.4848 -0.7433
0.5094 -0.7413
0.5226 -0.7440
0.5352 -0.7512
0.5598 -0.7736
0.5722 -0.7881
0.5974 -0.8090
0.6098 -0.8249
0.6339 -0.8341
0.6463 -0.8417
0.6719 -0.8619
0.6843 -0.8701
0.7083 -0.8714
0.7207 -0.8692
0.7451 -0.8838
0.7576 -0.8817
0.7700 -0.8836
0.7883 -0.8790
0.8007 -0.8744
0.8263 -0.8679
0.8387 -0.8662
0.8516 -0.8507
0.8748 -0.8351
0.8872 -0.8254
0.7914 -0.8739
0.8038 -0.8724
0.8294 -0.8690
0.8418 -0.8604
0.8655 -0.8473
0.8779 -0.8346
0.8899 -0.8260
0.7945 -0.8712
0.8100 -0.8724
0.8325 -0.8660
0.8449 -0.8615
0.8686 -0.8457
0.8810 -0.8348
0.7976 -0.8696
0.8122 -0.8706
0.8356 -0.8677
0.8480 -0.8535
0.8717 -0.8388
0.8841 -0.8322
################## (END)