(cba:news) Tak V85 and friends

Joe Patterson jop at astro.columbia.edu
Sat Jan 29 15:27:50 EST 2000





Dear CBAers,

Well as many of you know we've been vigorously pursuing the new
eclipsing SU UMa star, Takamizawa V85.  We have had some good weather
in AZ, and Jonathan has obtained some wonderful high-speed light
curves.  The white dwarf seems to have emerged a lot faster than I
expected.  It's responsible for about *half* the light in the binary,
it gets covered and uncovered in just 35 seconds by the knife-edge of
the secondary.  I append a blow-up of the eclipse; look at the
egresses - you can see a clean egress of the white dwarf (first) and
then the bright spot (last).  So we can measure the brightness of both
every time around.  O! the joy!  (Meriwether Lewis after glimpsing the
Pacific.)  By the way, this is an intensity scale, which facilitates
the identification of components; the star is about 16.7 out of eclipse 
and 19.5 in. 

Admittedly very few of you are in position to measure such things, but
I couldn't resist.  Some of the hump behavior is very strong and could
still be measured with small scopes (Tonny has successfully done it), 
but for most TmzV85 has dropped off their radar screens (or perhaps 
never appeared).  For most of the CBA world, I again commend BY Cam, 
FS Aur, and CN Ori.  RZ LMi is the other appealing target now coming 
into view - up all night now in Upper Hyperborea.  BY Cam is a violent 
variable and will keep you hopping!

Jonathan threatens to revamp the website and set up a nice TmzV85
centerfold.  He is very busy with observing now but that should come
in about 2 weeks.  The VSNET website has many daily updates on the
Tak-ster, by the way.  Attempts to foment a collaboration with the
Ouda people have not been successful, but... well, maybe some day.


                            Joe

Eclipse blow-up - HJD versus intensity



 72.87072      94.9729
 72.87097      94.5366
 72.87121      94.3626
 72.87146      96.9170
 72.87171      97.6337
 72.87195      97.9039
 72.8722       100.092
 72.87245      99.4489
 72.87269      95.2357
 72.87295      101.484
 72.87319      93.1536
 72.87343      88.0643
 72.87369      90.2817
 72.87393      91.0332
 72.87418      88.1454
 72.87443      86.7760
 72.87467      86.1390
 72.87492      86.0597
 72.87517      81.7334
 72.87541      82.7179
 72.87567      84.4889
 72.87591      83.2530
 72.87615      85.6643
 72.87641      87.0963
 72.87665      82.7942
 72.87689      82.9468
 72.87715      85.5854
 72.87739      80.0202
 72.87763      90.1986
 72.87789      86.1390
 72.87813      81.6582
 72.87837      92.4698
 72.87863      90.0326
 72.87887      99.1744
 72.87911      97.6337
 72.87937      87.2569
 72.87961      86.5366
 72.87986      87.8213
 72.88011      83.0998
 72.88035      84.8008
 72.8806       83.7915
 72.88085      86.1390
 72.88109      81.0587
 72.88134      89.6189
 72.88159      79.2136
 72.88183      75.5092
 72.88208      84.3334
 72.88233      78.7771
 72.88258      89.5364
 72.88282      92.5550
 72.88306      90.3649
 72.88332      105.002
 72.88356      93.1536
 72.8838       94.2757
 72.88406      87.9832
 72.8843       91.3692
 72.88454      93.6699
 72.8848       88.7973
 72.88504      94.1022
 72.8853       100.184
 72.88554      95.0604
 72.88578      89.2894
 72.88604      93.6699
 72.88628      97.2747
 72.88652      99.1744
 72.88678      93.1536
 72.88702      101.111
 72.88726      97.9941
 72.88752      99.0832
 72.88776      98.5371
 72.9038       126.706
 72.90406      137.151
 72.90431      130.496
 72.90455      140.734
 72.90481      122.574
 72.90506      125.429
 72.90531      142.036
 72.90556      141.644
 72.90582      144.145
 72.90606      151.495
 72.90631      153.744
 72.90656      159.661
 72.9068       143.218
 72.90705      139.701
 72.9073       135.893
 72.90754      146.015
 72.9078       135.145
 72.90804      141.644
 72.90828      138.420
 72.90854      123.140
 72.90878      133.413
 72.90902      123.822
 72.90928      125.892
 72.90952      125.314
 72.90976      117.057
 72.91001      113.762
 72.91026      124.165
 72.9105       125.545
 72.91075      120.005
 72.911        121.450
 72.91124      109.647
 72.9115       114.498
 72.91174      109.144
 72.91198      108.143
 72.91224      109.446
 72.91248      114.287
 72.91273      125.660
 72.91298      121.450
 72.91322      130.016
 72.91347      129.419
 72.91372      132.068
 72.91396      126.823
 72.91421      119.014
 72.91446      125.429
 72.9147       122.348
 72.91495      128.943
 72.9152       131.704
 72.91545      135.020
 72.91569      129.181
 72.91594      132.556
 72.91619      124.279
 72.91643      127.997
 72.91668      124.853
 72.91693      127.174
 72.91717      137.151
 72.91742      133.413
 72.91767      140.345
 72.91791      138.038
 72.91818      128.351
 72.91842      129.777
 72.91866      123.140
 72.91892      121.786
 72.91916      123.140
 72.9194       127.408
 72.91966      134.772
 72.9199       143.747
 72.92014      146.015
 72.9204       141.644
 72.92064      138.547
 72.92089      107.053
 72.92114      89.7015
 72.92138      80.2416
 72.92164      77.1258
 72.92188      68.8652
 72.92214      63.8557
 72.92238      57.4910
 72.92263      46.7735
 72.92288      29.2146
 72.92313      19.2486
 72.92337      14.4012
 72.92362      11.4604
 72.92387      10.0092
 72.92411      10.8542
 72.92436      9.69169
 72.92461      10.9144
 72.92486      12.4968
 72.92511      13.8547
 72.92535      15.6170
 72.92561      38.4414
 72.92585      61.8301
 72.92611      68.0456
 72.92636      71.5154
 72.9266       72.3102
 72.92685      78.2708
 72.9271       79.5060
 72.92736      80.6863
 72.9276       84.7227
 72.92785      86.3773
 72.9281       84.4111
 72.92834      84.6447
 72.92859      86.9360
 72.92884      95.4113
 72.92908      112.098
 72.92933      124.968
 72.92958      121.898
 72.92983      120.892
 72.93008      126.240
 72.93033      130.978
 72.93058      132.190
 72.93083      124.165
 72.93108      133.168
 72.93134      133.045
 72.93159      125.660
 72.93183      130.857
 72.93209      131.099
 72.93234      126.357
 72.93259      122.574
 72.93284      122.574
 72.9331       122.011
 72.93335      123.026
 72.93359      115.664
 72.93385      116.627
 72.9341       121.338
 72.93435      120.115
 72.9346       111.995
 72.93486      112.615
 72.93511      111.070
 72.93535      113.867
 72.93561      119.233
 72.93585      113.553
 72.93611      107.349
 72.93636      112.305
 72.9366       114.921
 72.93686      113.553
 72.93711      119.233
 72.93737      115.877
 72.93761      108.143
 72.93786      105.293
 72.93812      108.442
 72.93836      99.6322
 72.93862      99.8159
 72.93887      102.329
 72.93911      107.844
 72.93937      103.371
 72.93961      110.255
 72.93987      98.9008
 72.94011      106.267
 72.94036      102.235
 72.94062      100.739
 72.94086      105.681
 72.94112      99.9079
 72.94136      106.954
 72.94161      105.390
 72.94187      105.584
 72.94211      99.4489
 72.94237      100
 72.94261      104.039
 72.94286      103.181
 72.94311      105.293
 72.94335      107.745
 72.94361      103.181
 72.94385      107.053
 72.94409      112.512
 72.94435      105.584
 72.94459      105.681
 72.94483      107.944
 72.94509      110.764
 72.94533      100.554
 72.94557      101.111
 72.94583      101.204
 72.94607      106.169
 72.94631      104.616
 72.94657      107.646
 72.94681      97.3643
 72.94705      103.848
 72.94731      95.0604
 72.94755      95.0604
 72.9478       98.3557
 72.94805      98.9919
 72.94829      98.6279




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