XO-3

XO-3
AXA Light Curves, Finder Chart & All-Sky Photometry Results

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    Basic data
    Comments
    Transit LCs
    Out-of-transit LCs
    All-sky photometry
    Finder Image

Basic data

RA = 04:21:53.5, DE = +57:49:01
    Season = Dec 01
    B = 10.25 ± 0.03, V = 9.80 ± 0.03, Rc = 9.54 ± 0.03, Ic = 9.28 ± 0.05, B-V = 0.45 ± 0.05 (B. Gary, all-sky)
    HJDo = 4025.3967 (38)
    P = 3.1915426 (14) day
    Depth = 9.3 ± 1.0 mmag (R-band)
    Length = 2.90 ± 0.06 hr

Comments

Many more LCs are coming.

	Date [yyyy.mm.dd]	Filter	Observer	Depth [mmag]	Length [hr]	UT mid	JD mid	HJD mid	HJD ephem	dt [min]






2	2008.02.10	R	Naves	15.0 ± 1.5	3.35 ± 0.13	19.675 ± 0.067	4507.3196 ± 0.0028	4507.3215	4507.3196	+2.7 ± 4.0
1	2006.10.16	R	Vanmunster	9.3 ± 0.8	3.00 ± 0.13	21.450 ± 0.063	4025.3938 ± 0.0026	4025.3967	4025.3967	+0.1 ± 3.8

Light Curves

Depth is uncertain due to apparent "air mass curvature" systematic effect. Coming late is credible though.

Amazingly good precision (by a master observer).

Coied from discovery paper, Johns-Krull, et al (2007) http://arxiv.org/abs/0712.4283

Out-of-Transit (OOT)

Not statistically significant.

All-Sky Photometry

Estimated SE values are 0.03, 0.03, 0.03 and 0.05 mag. The B-V SE is 0.05 mag.

This is an "internal consistency check." It passes!

I conclude that interstellar reddening biases the Tycho V-mag value, and might also influence the conversion from J and K to V. The two all-sky measurements provide a consistent result that is free of the interestellar reddening biases. which argues for V-mag = 9.80 ± 0.03.

Finder Image

Here's a reference to the "discovery paper" for XO-3:

"XO-3: A MASSIVE PLANET IN AN ECCENTRIC ORBIT TRANSITING AN F5V STAR," Christopher M. Johns-Krull, Peter R. McCullough, Christopher J. Burke, Jeff A. Valenti, K. A. Janes, J. N. Heasley, L. Prato, R. Bissinger, M.Fleenor, C. N. Foote, E. Garcia-Melendo, B. L. Gary, P. J. Howell, F. Mallia, G. Masi, T. Vanmunster

http://arxiv.org/abs/0712.4283

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WebMaster: Bruce L. Gary. Nothing on this web page is copyrighted. This site opened: September 17, 2007. Last Update: May 08, 2008