[vsnet-chat 5591] BD+59 224 V, Rc, and H alpha Photometry

[DWest61506@aol.com]

Brian:
I have made some additional measurements of BD+59 224 (see below).  From my observations I can conclude two things: 1. Variability is small over the past three weeks.  2. H alpha emission is present.  Non-emission line stars have H alpha ~2.  An H alpha of 1.89 indicates weak H alpha emission.  Does the presence of H alpha emission provide more evidence supporting the possibility that this is a VV Cep type of system?

Regards,
Doug West
http://hometown.aol.com/dwest61506/index.html

Photometry (without color correction)
Star                   UT  Date/Time                     Measurements
BD+59 224        10/21/2002 01:32                  V=9.39
GSC 4030:591   10/21/2002 01:32                  V=10.20
BD+59 224        10/22/2002 01:28                  V=9.38
GSC 4030:591   10/22/2002 01:28                  V=10.19
BD+59 224        10/22/2002 01:32                  Rc=8.42
GSC 4030:591   10/22/2002 01:32                  Rc=10.06
BD+59 224        10/22/2002 01:35                  H alpha = 1.89 +/-0.01
GSC 4030:591   10/22/2002 01:35                  H alpha = 2.02 +/-0.02

Previous Photometry (without color transformation) 09/29/2002 2:21UT:
GSC 4030:591  V=10.28 +/-0.06, B-V= -0.06+/-0.15, V-Rc=0.23+/-0.07
BD+59 224     V= 9.38 +/-0.06, B-V=  1.31+/-0.15, V-Rc=0.97+/-0.07

Comparison stars for photometry:
GSC 4030:427  [BD+59 227]  B=11.57, V=10.48, Rc=9.88 
SAO 11690 [HD 7796]  B=9.59, V=9.47, Rc=9.39  
B&V from Tycho 1, Rc from conversion formula at: http://hometown.aol.com/dwest61506/page32.html

Information on H alpha photometry:
http://members.aol.com/dwest61506/page34.html
http://hometown.aol.com/dwest61506/page35.html

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