J/AJ/146/113 Differential griz photometry of HATS-3 (Bayliss+, 2013)
HATS-3b: an inflated hot Jupiter transiting an F-type star.
Bayliss D., Zhou G., Penev K., Bakos G.A., Hartman J.D., Jordan A.,
Mancini L., Mohler-Fischer M., Suc V., Rabus M., Beky B., Csubry Z.,
Buchhave L., Henning T., Nikolov N., Csak B., Brahm R., Espinoza N.,
Noyes R.W., Schmidt B., Conroy P., Wright D.J., Tinney C.G., Addison B.C.,
Sackett P.D., Sasselov D.D., Lazar J., Papp I., Sari P.
<Astron. J., 146, 113 (2013)>
=2013AJ....146..113B 2013AJ....146..113B
ADC_Keywords: Planets ; Stars, double and multiple ; Stars, F-type ;
Photometry, ugriz ; Radial velocities
Keywords: planetary systems - stars: individual (HATS-3,GSC 6926-00454) -
techniques: photometric - techniques: spectroscopic
Abstract:
We report the discovery by the HATSouth survey of HATS-3b, a
transiting extrasolar planet orbiting a V=12.4 F dwarf star. HATS-3b
has a period of P=3.5479days, mass of Mp=1.07MJ, and radius of
Rp=1.38R J. Given the radius of the planet, the brightness of the
host star, and the stellar rotational velocity (vsini=9.0km/s), this
system will make an interesting target for future observations to
measure the Rossiter-McLaughlin effect and determine its spin-orbit
alignment. We detail the low-/medium-resolution reconnaissance
spectroscopy that we are now using to deal with large numbers of
transiting planet candidates produced by the HATSouth survey. We show
that this important step in discovering planets produces logg and
Teff parameters at a precision suitable for efficient candidate
vetting, as well as efficiently identifying stellar mass eclipsing
binaries with radial velocity semi-amplitudes as low as 1km/s.
Description:
The exoplanet HATS-3b was first identified from the HATSouth global
network of automated telescopes: the HS-2 unit in Chile on 2009
Sep-2010 Sep (Sloan r filter), the HS-4 unit in Namibia on 2009
Sep-2010 Sep (Sloan r filter), and the HS-6 unit in Australia on 2010
Aug-2010 Sep (Sloan r filter).
For our high-precision photometric follow-up, we used two facilities:
the Spectral camera on the 2.0m Faulkes Telescope South (FTS; part of
the Las Cumbres Observatory Global Telescope-LCOGT Network) on 2012
Jun 20 (Sloan i) and on 2012 Jul 15 (sloan i), and the GROND camera on
the MPG/ESO 2.2m telescope (at La Silla Observatory in Chile) on 2012
Aug 21 (sloan g, r, i, z). The high-precision photometric follow-up
data are presented in Table5.
HATS-3 was monitored by three different echelle spectrographs capable
of measuring high-precision radial velocities: the AAT 3.9m/CYCLOPS on
2012 May 5-11 (R=70000, λ=4540-7340Å), the Euler
1.2m/Coralie on 2012 Jun 2-7 (R=60000, λ=3850-6900Å), and
the MPG/ESO 2.2m/FEROS on 2012 Apr 1-Jun 8 (R=48000,
λ=3500-9200Å).
Objects:
------------------------------------------------------------------------
RA (ICRS) DE Designation(s) (Period)
------------------------------------------------------------------------
20 49 49.78 -24 25 43.5 HATS-3 = 2MASS J20494978-2425436 (P=3.54785)
------------------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 33 29 Relative radial velocity measurements of HATS-3
table5.dat 45 15837 Differential photometry of HATS-3
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See also:
J/AJ/145/5 : Follow-up photometry of HATS-1 (Penev+, 2013)
J/ApJ/757/18 : RVs for 16 hot Jupiter host stars (Albrecht+, 2012)
J/ApJ/742/59 : HAT-P-32 and HAT-P-33 follow-up (Hartman+, 2011)
J/ApJ/710/1724 : Follow-up photometry for HAT-P-11 (Bakos+, 2010)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [2]
2- 10 F9.5 d BJD Barycentric Julian Date (BJD-2456000)
12- 15 I4 m/s RV Radial velocity (1)
17- 19 I3 m/s e_RV The 1σ uncertainty in RV (2)
21- 25 F5.3 --- Phase Phase
27- 33 A7 --- Inst Instrument (AAT, Coralie, FEROS) (3)
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Note (1): The zero-point of these velocities is arbitrary. An overall offset
γrel fitted separately to the CORALIE, FEROS, and CYCLOPS
velocities in Section 3 has been subtracted.
Note (2): Internal errors excluding the component of astrophysical/instrumental
jitter considered in Section 3.
Note (3): Telescope/Instrument are:
AAT = AAT 3.9m/CYCLOPS;
Coralie = Euler 1.2m/Coralie;
FEROS = MPG/ESO 2.2m/FEROS.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD Barycentric Julian Date (BJD-2400000)
13- 20 F8.5 mag dmag Differential magnitude in Flt (1)
22- 28 F7.5 mag e_dmag Uncertainty in dmag
30- 37 F8.5 mag Omag ? Original magnitude in Flt (2)
39 A1 --- Flt [griz] Filter used in observation (Sloan)
41- 45 A5 --- Inst Instrument used (FTS, GROND, HS) (3)
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Note (1): The out-of-transit level has been subtracted. For the HATSouth light
curve (rows with "HS" in the Instrument column), these magnitudes have been
detrended using the EPD and TFA procedures prior to fitting a transit model
to the light curve. Primarily as a result of this detrending, but also due
to blending from neighbors, the apparent HATSouth transit depth is ∼86%
that of the true depth in the Sloan r filter. For the follow-up light
curves (rows with an Instrument other than "HS") these magnitudes have been
detrended with the EPD and TFA procedures, carried out simultaneously with
the transit fit (the transit shape is preserved in this process).
Note (2): Raw magnitude values without application of the EPD and TFA
procedures. This is only reported for the follow-up light curves.
Note (3): Facilities are:
FTS = FTS/Spectral;
GROND = MPG/ESO2.2/GROND;
HS = HATSouth light curve.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 17-Jul-2014