WASP-2
AXA Light Curves

Links internal to this web page:
    Comments
    Basic data
    Table Summary of transit measurements
    Transit LCs
    OOT LCs
    Finder image

Comments on LCs on this web page:

    All transit LCs are earlier than the ephemeris predicted times, so probably the period should be adjusted downward.
    The OOT LCs show features but they might be systematics.

Basic Data

    RA = 20:30:54.1, Decl = +06:25:46
    Season = July 31
    V = 11.98 ± 0.??, B-V = 1.02 ± 0.05, R ~ 11.48
    HJDo = 3991.5146
    P = 2.15226 day
    Depth = 19 mmag (R-band)
    Length = 1.78 ± 0.08 hr

Summary of Transit Measurements

Date Filter Observer Depth [mmag] Length [hr] UT mid JD mid HJD mid Ephem HJD dt [min]
2007.10.03
 R
 Sheridan
 20.8
 n/a
 06.31 ± 0.03
 4376.7629
 4376.7656 ± 0.0013
 4376.7691
 -5.1 ± 2.0
2007.09.05
 R
 Sheridan
 25
 1.75
 06.625
 4348.7760
 4348.7805
 4348.7898
 -12.1
2007.08.21
 R
 Sheridan
 18
 1.79
 5.125
 4333.7135
 4333.7186 4333.7239
 -7.6
2007.08.08
 R
 Foote
 19
 1.76
 7.200
 4320.8000
 4320.8053
 4320.8104
 -7.3
2007.08.03
 R
 Vanmunster
 20.5
 1.70
 23.850
 4316.4938
 4316.4991
 4316.5059
 -9.8
2007.06.28
 R
 Foote
 19
 1.76
 9.760
 4279.9067
 4279.9110 4279.9174
 -9.2
2007.06.26
 BB
 Gary
 17
 1.93
 6.09
 4277.7538
 4277.7580 4277.7652
 -10.4
2007.06.09
 IRB
 Gregorio
 26
 1.60
 1.00
 4260.5417
 4260.5420
 4260.5471
 -7.3

All "dt[min]" values are negative, meaning that transits are observed to occur early. The median & average dt = -9.2 & 9.1 min.
Transit lengths are the same for R-band, and may differ for the blue-blocking and IR-blocking bands. The median & average L = 1.76 & 1.76 hr (all filters).
Transit depth doesn't have a pattern yet. The median & average depth = 19.0 and 20.6 mmag (all filters).

Transit Light Curves



High air mass near end produced large rise feature. Nice OOT and ingress. Mid-transit time derived from ingress and adopted length.


Early, like all the others, but quite deep. Good to have a 7-hour session (helps establish air mass curvature coefficient).


Edwin Sheridan's first exoplanet light curve! Congratulations!


Almost perfect!


Early event, like the others; deeper depth than expected like other measurements.


Nice!



A little short on OOT baselines but good otherwise.


Out-of-Transit (OOT) Light Curves




Same dip at 06.1 UT. Must be a systematic.


OOT.


OOT.


OOT. Something systemtic going on.


Finder Image

Coming soon.

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WebMaster: Bruce L. Gary. Nothing on this web page is copyrighted. This site opened:  August 07, 2007.  Last Update:  October 03, 2007.