BU Vul   Mallama 1980 = ApJS 44, pp 241-272 (Oct 1980)  
 
                                                     
System Type: EA/sd OMT = "Observed Minima Timings of Eclipsing Binaries" by the AAVSO, available from www.aavso.org            
             
GCVS 4 Eph.   33533.683 0.56899          
               
--- Working ----              
Epoch =   33533.683            
Period =   0.568993            
Rounding Tol. = 0.2            
  Linear Quadratic          
LS Intercept =   -0.0997422                
LS Slope =   3.6351E-06                
LS Quadr term =                    
Sum diff² =                
New epoch =   51483.7189                
New Period =   0.56899664                
               
New Ephemeris = 51483.7189 0.569              
      Y1 Y2 Y3 Y4 Y5 Y6   Y7  
Source Typ ToM error n' n O-C GCVS 4 Mallama Misc OMT #1 OMT #4 OMT #6 Nelson BBSAG Lin Fit Q fit Date  
GCVS 4   33533.683 na 0 0 0 0           9/9/1950  
Mallama1980   40037.841 0.005 11430.998 11431 -0.00098   -0.000983           6/30/1968  
BBSAG Bull...13 40038.406   11431.991 11432 -0.00498         -0.004976   6/30/1968     9 Diethelm R   B
BBSAG Bull...13 40059.468   11469.008 11469 0.004283         0.004283   7/21/1968     8 Diethelm R   B
BBSAG Bull...13 40063.439   11475.987 11476 -0.00767         -0.007668   7/25/1968     7 Diethelm R   B
BBSAG Bull...14 40088.494   11520.02 11520 0.01164         0.01164   8/19/1968     6 Diethelm R   B
BBSAG Bull...15 40141.382   11612.971 11613 -0.01671         -0.016709   10/11/1968     8 Diethelm R   B
BBSAG Bull...15 40149.367   11627.004 11627 0.002389         0.002389   10/19/1968     12 Germann R   B
BBSAG Bull...15 40157.329   11640.997 11641 -0.00151         -0.001513   10/27/1968     13 Diethelm R   B
BBSAG Bull...18 40344.528   11969.998 11970 -0.00121         -0.00121   5/3/1969     13 Locher K   B
BBSAG Bull...18 40344.537   11970.014 11970 0.00779         0.00779   5/3/1969     8 Diethelm R   B
BBSAG Bull...18 40364.449   12005.009 12005 0.005035         0.005035   5/22/1969     5 Locher K   B
BBSAG Bull...18 40365.588   12007.011 12007 0.006049         0.006049   5/24/1969     11 Locher K   B
BBSAG Bull...18 40381.514   12035 12035 0.000245         0.000245   6/9/1969     10 Locher K   B
BBSAG Bull...19 40402.573   12072.011 12072 0.006504         0.006504   6/30/1969     6 Locher K   B
Mallama1980   40403.1346 0.005 12072.998 12073 -0.00089   -0.000889           6/30/1969  
BBSAG Bull...20 40495.314   12235.003 12235 0.001645         0.001645   9/30/1969     7 Locher K   B
BBSAG Bull...20 40504.406   12250.982 12251 -0.01024         -0.010243   10/9/1969     12 Germann R   B
BBSAG Bull...20 40507.258   12255.994 12256 -0.00321         -0.003208   10/12/1969     12 Locher K   B
BBSAG Bull...21 40528.312   12292.997 12293 -0.00195         -0.001949   11/2/1969     6 Arnold v on Rotz   B
BBSAG Bull...21 40565.298   12357.999 12358 -0.00049         -0.000494   12/9/1969     16 Locher K   B
BBSAG Bull...24 40711.534   12615.008 12615 0.004305         0.004305   5/5/1970     8 Diethelm R   B
BBSAG Bull...24 40731.442   12649.996 12650 -0.00245         -0.00245   5/24/1970     7 Diethelm R   B
BBSAG Bull...24 40731.445   12650.001 12650 0.00055         0.00055   5/24/1970     11 Locher K   B
BBSAG Bull...24 40735.425   12656.996 12657 -0.0024         -0.002401   5/28/1970     6 Locher K   B
BBSAG Bull...24 40735.433   12657.01 12657 0.005599         0.005599   5/28/1970     8 Diethelm R   B
BBSAG Bull...24 40740.547   12665.998 12666 -0.00134         -0.001338   6/3/1970     7 Locher K   B
BBSAG Bull...25 40768.423   12714.989 12715 -0.00599         -0.005995   6/30/1970     7 Diethelm R   B
Mallama1980   40768.4273 0.005 12714.997 12715 -0.00169   -0.001695           6/30/1970  
BBSAG Bull...25 40805.408   12779.99 12780 -0.00554         -0.00554   8/6/1970     11 Locher K   B
BBSAG Bull...26 40839.55   12839.995 12840 -0.00312         -0.00312   9/10/1970     10 Locher K   B
BBSAG Bull...26 40858.328   12872.997 12873 -0.00189         -0.001889   9/28/1970     7 Locher K   B
BBSAG Bull...27 40866.3   12887.007 12887 0.004209         0.004209   10/6/1970     8 Diethelm R   B
BBSAG Bull...27 40866.308   12887.021 12887 0.012209         0.012209   10/6/1970     7 Erdin A   B
BBSAG Bull...27 40887.345   12923.994 12924 -0.00353         -0.003532   10/27/1970     8 Locher K   B
Mallama1980   41133.722 0.005 13356.999 13357 -0.0005   -0.000501           7/1/1971  
BBSAG Bull...31 41135.424   13359.99 13360 -0.00548         -0.00548   7/2/1971     9 Raeuber N   B
BBSAG Bull...31 41139.414   13367.003 13367 0.001569         0.001569   7/6/1971     8 Diethelm R   B
ORION 126   41139.414   13367.003 13367 0.001569   0.001569         7/6/1971   v   K
BBSAG Bull...31 41143.394   13373.998 13374 -0.00138         -0.001382   7/10/1971     10 Peter H   B
ORION 126   41143.394   13373.998 13374 -0.00138   -0.001382         7/10/1971   v   K
BBSAG Bull...31 41168.425   13417.989 13418 -0.00607         -0.006074   8/4/1971     8 Diethelm R   B
ORION 126   41168.425   13417.989 13418 -0.00607   -0.006074         8/4/1971   v   K
BBSAG Bull...31 41176.4   13432.005 13432 0.003024         0.003024   8/12/1971     8 Diethelm R   B
ORION 126   41176.4   13432.005 13432 0.003024   0.003024         8/12/1971   v   K
BBSAG Bull...31 41176.403   13432.011 13432 0.006024         0.006024   8/12/1971     8 Locher K   B
ORION 126   41176.403   13432.011 13432 0.006024   0.006024         8/12/1971   v   K
BBSAG Bull...32 41202.568   13477.995 13478 -0.00265         -0.002654   9/8/1971     8 Diethelm R   B
ORION 127   41202.568   13477.995 13478 -0.00265   -0.002654         9/8/1971   v   K
BBSAG Bull...33 41213.379   13496.996 13497 -0.00252         -0.002521   9/18/1971     11 Peter H   B
ORION 128   41213.379   13496.996 13497 -0.00252   -0.002521         9/18/1971   v   K
Mallama1980   41499.0151 0.005 13998.998 13999 -0.00091   -0.000907           6/30/1972  
Mallama1980   41863.7392 0.005 14639.998 14640 -0.00132   -0.00132           6/30/1973  
IBVS 978   41960.471 na 14810.003 14810 0.00167     0.00167     10/4/1973  
Mallama1980   42229.0324 0.005 15281.997 15282 -0.00163   -0.001626           6/30/1974  
Mallama1980   42594.3262 0.005 15923.998 15924 -0.00133   -0.001332           6/30/1975  
OMT #1   42919.791 na 16495.999 16496 -0.00053   -0.000528       5/21/1976  
OMT #1   42919.796 na 16496.008 16496 0.004472   0.004472       5/21/1976  
OMT #1   42923.773 na 16502.997 16503 -0.00148   -0.001479       5/25/1976  
OMT #1   42923.776 na 16503.003 16503 0.001521   0.001521       5/25/1976  
Mallama1980   42959.621 0.005 16566 16566 -3.8E-05   -3.8E-05           6/30/1976  
OMT #1   42960.756 na 16567.995 16568 -0.00302   -0.003024       7/1/1976  
OMT #1   42964.74 na 16574.997 16575 -0.00197   -0.001975       7/5/1976  
OMT #1   42964.741 na 16574.998 16575 -0.00097   -0.000975       7/5/1976  
OMT #1   42980.677 na 16603.006 16603 0.003221   0.003221       7/21/1976  
OMT #1   42985.791 na 16611.993 16612 -0.00372   -0.003716       7/26/1976  
OMT #1   43009.693 na 16654.001 16654 0.000578   0.000578       8/19/1976  
OMT #1   43026.757 na 16683.991 16684 -0.00521   -0.005212       9/5/1976  
OMT #1   43026.765 na 16684.005 16684 0.002788   0.002788       9/5/1976  
OMT #1   43051.796 na 16727.997 16728 -0.0019   -0.001904       9/30/1976  
OMT #1   43083.655 na 16783.989 16784 -0.00651   -0.006512       11/1/1976  
OMT #1   43290.772 na 17147.995 17148 -0.00296   -0.002964       5/27/1977  
Mallama1980   43324.9132 0.005 17207.998 17208 -0.00134   -0.001344           6/30/1977  
OMT #1   43413.67 na 17363.987 17364 -0.00745   -0.007452       9/27/1977  
OMT #1   43466.592 na 17456.997 17457 -0.0018   -0.001801       11/19/1977  
OMT #1   43665.733 na 17806.985 17807 -0.00835   -0.008351       6/6/1978  
OMT #1   43665.742 na 17807.001 17807 0.000649   0.000649       6/6/1978  
OMT #1   43669.724 na 17813.999 17814 -0.0003   -0.000302       6/10/1978  
OMT #1   43673.708 na 17821.001 17821 0.000747   0.000747       6/14/1978  
Mallama1980   43690.207 0.005 17849.998 17850 -0.00105   -0.00105           6/30/1978  
OMT #1   43694.755 na 17857.991 17858 -0.00499   -0.004994       7/5/1978  
OMT #1   43718.655 na 17899.995 17900 -0.0027   -0.0027       7/29/1978  
OMT #1   43723.774 na 17908.992 17909 -0.00464   -0.004637       8/3/1978  
OMT #1   44049.816 na 18482.008 18482 0.004374   0.004374       6/25/1979  
OMT #1   44081.675 na 18538 18538 -0.00023   -0.000234       7/27/1979  
OMT #1   44082.815 na 18540.003 18540 0.00178   0.00178       7/28/1979  
OMT #1   44126.625 na 18616.999 18617 -0.00068   -0.000681       9/10/1979  
OMT #1   44407.706 na 19110.996 19111 -0.00222   -0.002223       6/17/1980  
OMT #1   44444.7 na 19176.013 19176 0.007232   0.007232       7/24/1980  
OMT #1   44473.714 na 19227.005 19227 0.002589   0.002589       8/22/1980  
OMT #1   44485.666 na 19248.01 19248 0.005736   0.005736       9/3/1980  
OMT #1   44493.627 na 19262.001 19262 0.000834   0.000834       9/11/1980  
OMT #1   44816.815 na 19830.001 19830 0.00081   0.00081       7/31/1981  
OMT #1   44836.739 na 19865.018 19865 0.010055   0.010055       8/20/1981  
OMT #1   44849.817 na 19888.002 19888 0.001216   0.001216       9/2/1981  
OMT #1   44856.643 na 19899.999 19900 -0.0007   -0.0007       9/9/1981  
OMT #1   44868.595 na 19921.004 19921 0.002447   0.002447       9/21/1981  
OMT #1   44869.724 na 19922.989 19923 -0.00654   -0.006539       9/22/1981  
OMT #1   44872.575 na 19927.999 19928 -0.0005   -0.000504       9/25/1981  
OMT #1   44876.563 na 19935.008 19935 0.004545   0.004545       9/29/1981  
OMT #1   44885.665 na 19951.005 19951 0.002657   0.002657       10/8/1981  
OMT #1   44938.577 na 20043.997 20044 -0.00169   -0.001692       11/30/1981  
OMT #1   45166.748 na 20445.005 20445 0.003115   0.003115       7/16/1982  
OMT #1   45264.606 na 20616.99 20617 -0.00568   -0.005681       10/22/1982  
OMT #1   45492.771 na 21017.988 21018 -0.00687   -0.006874