Transit observations (TRESCA database)

Exoplanet:	GJ3470 b
observer:
Post address:
E-mail:
Station:
Geographic location:	east longitude: 289° \| north latitude: 42°
Instrument:
Photometric filter:	U B V R I Clear
Notes / conditions:	THIS TRANSIT MID TIME OCCURRED 143 MINUTES EARLY with longer than expected duration and greater depth compared to expected /reference paper. Unfortunately clouds ruined recording predicted transit time. Is this GJ3470b or another planet??? BBC filter, 11 star ensemble, clear sky. Alternative 2 star ensemble shows same result. Computer time accuracy synched by Dimension-4 every 15 sec. Maybe a false transit LC but I have successfully recorded 85+ LCs so far and never had this happen.
Already published in:

S is standard deviation
DQ is data quality index, calculated by amplitude and S relation,
ro is data density per minute

Mid transit JDmid:
Mid transit HJDmid:	(helcor = 0.00535)
Mid transit - UTC:
Transit duration:	minut
Transit depth:	mag
Submitted data:	geocentric based on UTC

Identification chart:

Show in ETD


R_p:	0.38 +/- 0.05 R_Jup	0.504 _-0.014^+0.014 R_Jup
R_*:	0.568 +/- 0.063 R_Sun	fixed, errors included in i
A:	0.0348 +/- 0.0014 AU	fixed, errors included in i
Per:	3.33665 days	fixed
i :	88.3 +/- 0.5 °	88.21 _-0.21\|1.55^+0.24\|1.79 °

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object GJ3470 b

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Paul Benni, 3. 1. 2014 (www)
Update: Based on recent Spitzer Observations (Demory et al 2013; arXiv:1301.6555v2) their updated Transit Ephemeris calculation fits this GJ3470b transit LC. -Paul Benni

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