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[vsnet-ecl 19] (No Subject in original)

Subject:  Beta Per observations 11-12 Sep 1999 

>>vsnet-ecl@kusastro.kyoto-u.ac.jp
<<ktikkane@mail.student.oulu.fi (Kari Tikkanen) 14 Sep 1999

Observer    : Kari Tikkanen, Finland
Instruments : Binoculars 12x50 mm and naked eyes         
Notes       : extinction corrected mag values
 
 Minimum of beta PER observed visually 11-12/Sep/1999 

variable YYMMDD(UT)   mag   observer  conditions

PERbeta  990911.8021  2.50  Tikkanen  dusk, clouds, uncertain   
PERbeta  990911.8239  2.13  Tikkanen  dusk, clouds, uncertain 
PERbeta  990911.8678  2.75  Tikkanen
PERbeta  990911.8872  2.80  Tikkanen
PERbeta  990911.9076  2.83  Tikkanen
PERbeta  990911.9178  2.83  Tikkanen
PERbeta  990911.9325  2.90  Tikkanen
PERbeta  990911.9452  2.88  Tikkanen
PERbeta  990911.9588  3.00  Tikkanen
PERbeta  990911.9737  3.25  Tikkanen
PERbeta  990911.9860  3.30  Tikkanen
PERbeta  990911.9959  3.28  Tikkanen
PERbeta  990912.0046  3.32  Tikkanen
PERbeta  990912.0296  3.21  Tikkanen
PERbeta  990912.0469  3.10  Tikkanen
PERbeta  990912.0538  3.10  Tikkanen  haze
PERbeta  990912.0616  3.00  Tikkanen  haze, dawn
PERbeta  990912.0740  2.88  Tikkanen  haze, dawn

I calculated minimum by "mean of middle points":

min PERbeta 990912.006 0.006 Geo Tikkanen n=18 (Visual,calc by Tikkanen)


The Light curve of

                   11-12/SEP/1999   beta PER 
 2.0 +
     |     * 
     |
     |
     |
 2.5 +  *   
     |                                              
     |            *                                 
     |              *  * *                          
     |                     * *                 *    
 3.0 +                         *           ***         
     |                            *      *            
     |                             ***                
     |                                                 
     |                                                 
 3.5 +                                                 
     --+-----+-----+-----+-----+-----+-----+-----+-----+
       21    22    23    0     1     2     3     4 Local as Winter-T
       19    20    21    22    23    0     1     2     UT

With Best Regards,
Kari A. Tikkanen, Oulu, FINLAND, Europe Union
 http://vsnet.student.oulu.fi/~ktikkane/astrov.html

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