Dear group,
Good weather and very good seeing are finally here and represent an opportunity to brush off a serious amount of rust accumulated during winter and spring due to inactivity thanks to clouds, clouds and more clouds.
I was somewhat apprehensive in pursuing XO-1b due to the rich presence of the twelve-day old moon. As was the case with other occasions involving rich lunar light, I used my Baader IR-Pass filter for the pursuit of this 180-min transit and the resulting light curve exceeded my expectations.
The exoplanet XO-1b is very similar to Jupiter with respect to its mass and radius. Similarly, the host star is also very similar to our sun with respect to its spectral type, mass and radius.
For the result based on five hours total time and which includes 60 minutes pre-ingress, 180 minutes for the transit itself as well as 65 minutes post-ingress, I kindly direct you to http://www.perseus.gr/Astro-Photometry-XO-1-20090604.htm and where the 17 mmag drop in the magnitude of the parent star (11.19 pre-ingress) is beautifully documented.
I would like to thank my two faithful assistants - my AP160 and AP1200 - whose efforts make all of this possible!
Anthony.
Good weather and very good seeing are finally here and represent an opportunity to brush off a serious amount of rust accumulated during winter and spring due to inactivity thanks to clouds, clouds and more clouds.
I was somewhat apprehensive in pursuing XO-1b due to the rich presence of the twelve-day old moon. As was the case with other occasions involving rich lunar light, I used my Baader IR-Pass filter for the pursuit of this 180-min transit and the resulting light curve exceeded my expectations.
The exoplanet XO-1b is very similar to Jupiter with respect to its mass and radius. Similarly, the host star is also very similar to our sun with respect to its spectral type, mass and radius.
For the result based on five hours total time and which includes 60 minutes pre-ingress, 180 minutes for the transit itself as well as 65 minutes post-ingress, I kindly direct you to http://www.perseus.gr/Astro-Photometry-XO-1-20090604.htm and where the 17 mmag drop in the magnitude of the parent star (11.19 pre-ingress) is beautifully documented.
I would like to thank my two faithful assistants - my AP160 and AP1200 - whose efforts make all of this possible!
Anthony.
