David's Astronomy Pages Notes - Session 126 (2006-05-12) Notes (S125)   Notes (Main)   Home Page   Notes (S127)

Goto Images from 2006-05-12

Sky Conditions

Sky Conditions Summary (S126)

See explanation of these graphs

Back to Top

RT Auriga - Variable Star (Cepheid)

As part of an ongoing project examining the variability in RT Auriga, further image sets of the variable star RT Aur  & the reference star SAO SAO 78571 were recorded.  Image sets comprised  7 sequences of  images (3 x 2s V & 3 x 5s B) alternated between RT Aur & reference star.  These and previous image sets from previous session from Feb-May 2006 were analyzed using the methodology previously described under 2005-10-05 Notes.    Results are shown in graphs below.  Data is consistent with a regular variation with a period of 3.728115 days.
Quality control was less tight than ideal due to the faintness of the available check star (particularly in B).  Data quality, particularly in B Band, suffered from increasing Airmass through May, which hampered ability to confirm B-V trends through the magnitude minima. Nevertheless the light curve for RT Auriga has been reasonably well constrained by the total dataset.

RT Aur (Auriga) RT Aug (mag ~ +5)  with  Struve 907 double star,+9.3 & +10.4, separation 12 arc secs

CCD Image (50% size)  60 sec exposure, 1x1 binning, C Filter  2006-02-10 22:11h UT (#114120) [ Full Size Image ]

V Band Magnitude estimates for RT Aug  Reference Star SAO 78571 (mag +5.75) Check Star GSC 2422:1019 (mag +10.36)

B Band Magnitude estimates for RT Aug  Reference Star SAO 78571 (mag +5.76) Check Star GSC 2422:1019 (mag +11.38)

V Band Light Curve for RT Aug  Reference Star SAO 78571 (mag +5.75),  Check Star GSC 2422:1019 (mag +10.36)

B Band Light Curve for RT Aug  Reference Star SAO 78571 (mag +5.76) Check Star GSC 2422:1019 (mag +11.38)

B Band Light Curve for RT Aug  Reference Star SAO 78571 (mag +5.76) Check Star GSC 2422:1019 (mag +11.38)

Light Curve for RT Aug  Magnitude and colour variation in RT Auriga based on observations  on 12 observing sessions between 2006-02-10 and 2006-05-12 [ Reference Star SAO 78571 ]

Back to Top