J/AJ/145/5 Follow-up photometry of HATS-1 (Penev+, 2013)
HATS-1b: the first transiting planet discovered by the HATSouth survey.
Penev K., Bakos G.A., Bayliss D., Jordan A., Mohler M., Zhou G., Suc V.,
Rabus M., Hartman J.D., Mancini L., Beky B., Csubry Z., Buchhave L.,
Henning T., Nikolov N., Csak B., Brahm R., Espinoza N., Conroy P.,
Noyes R.W., Sasselov D.D., Schmidt B., Wright D.J., Tinney C.G.,
Addison B.C., Lazar J., Papp I., Sari P.
<Astron. J., 145, 5 (2013)>
=2013AJ....145....5P 2013AJ....145....5P
ADC_Keywords: Planets ; Stars, double and multiple ; Radial velocities ;
Photometry, ugriz ; Stars, G-type
Keywords: planetary systems - stars: individual (HATS-1,GSC 6652-00186) -
techniques: photometric - techniques: spectroscopic
Abstract:
We report the discovery of HATS-1b, a transiting extrasolar planet
orbiting the moderately bright V=12.05 G dwarf star GSC 6652-00186,
and the first planet discovered by HATSouth, a global network of
autonomous wide-field telescopes. HATS-1b has a period of
P~3.4465days, mass of Mp~1.86MJ, and radius of
Rp~1.30RJ. The host star has a mass of 0.99M☉ and
radius of 1.04R☉. The discovery light curve of HATS-1b has
near-continuous coverage over several multi-day timespans,
demonstrating the power of using a global network of telescopes to
discover transiting planets.
Description:
Photometric observations were obtained from 2010 January through 2010
August using the HS1 (HATSouth 1) instrument in Chile, the HS3
instrument in Namibia, and the HS5 instrument in Australia with the
Sloan r filter. The observations, reduction, and analysis of the
HATSouth data were carried out as described in Bakos et al.
(2013PASP..125..154B 2013PASP..125..154B).
Follow-up photometric observations of HATS-1 were obtained using the
SITe3 camera on the Swope 1.0m telescope at Las Cumbres Observatory
(LCO) on 2011 May 25 with the Sloan i filter, the Spectral instrument
on the 2.0m Faulkes Telescope South (FTS) at Siding Spring Observatory
(SSO) on 2011 May 28 with the Sloan r filter and on 2011 Jul 5 with
the Sloan i filter, and Gamma-Ray Burst Optical and Near-Infrared
Detector (GROND) on the MPG/ESO 2.2m telescope at La Silla Observatory
in Chile on 2012 Jan 21 with the Sloan g filter (λ=4550Å),
the Sloan r filter (λ=6270Å), and the Sloan i filter
(λ=7630Å).
Initial medium- and low-resolution "reconnaissance" spectroscopic
observations were obtained using the Wide Field Spectrograph (WiFeS)
on the ANU 2.3m telescope (2011 May 10-15, R=7000, 5200-7000Å; 2011
Jun 5, R=3000, 3500-6000Å). We then obtained higher resolution, and
higher RV precision observations with the Coralie spectrograph on the
Euler 1.2m telescope (2011 May 19-20, R=60000, 3850-6900Å) at La
Silla Observatory, FEROS (Fiber-fed Extended Range Optical
Spectrograph) on the MPG/ESO 2.2m telescope (2011 Jun 8-2012 Apr 18,
R=48000, 3500-9200Å) at La Silla, FIES on the 2.5m Nordic Optical
Telescope (NOT; 2011 Jun 15-18, R=67000, 3600-7400Å), and CYCLOPS
on the 3.9m Anglo-Australian Telescope (AAT; 2012 Jan 5-12, R=70000,
4540-7340Å) at Siding Spring Observatory (SSO).
Objects:
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RA (2000) DE Designation(s) (Period)
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11 42 06.08 -23 21 17.4 HATS-1 = GSC 06652-00186 (P=3.446459)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 53 33 Relative radial velocities and bisector span
measurements of HATS-1
table4.dat 46 12445 Differential photometry of HATS-1
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See also:
J/AJ/144/19 : Follow-up photometry for HAT-P-34--HAT-P-37 (Bakos+, 2012)
J/ApJ/734/109 : Follow-up photometry of HAT-P-27 (Beky+, 2011)
J/ApJ/728/138 : Follow-up photometry of HAT-P-26 (Hartman+, 2011)
J/ApJ/742/59 : HAT-P-32 and HAT-P-33 follow-up (Hartman+, 2011)
J/ApJ/735/24 : HAT-P-30 follow-up photometry (Johnson+, 2011)
J/AJ/141/63 : Relative RVS of HAT-P-4 & HAT-P-14 (Winn+, 2011)
J/ApJ/710/1724 : Follow-up photometry for HAT-P-11 (Bakos+, 2010)
J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)
J/ApJ/715/458 : Differential photometry of HAT-P-14 (Torres+, 2010)
J/ApJ/724/866 : Follow-up observations of HAT-P-15 (Kovacs+, 2010)
J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)
J/ApJ/707/446 : HAT-P-13 photometry follow-up (Bakos+, 2009)
J/ApJ/706/785 : HAT-P-12 light curve (Hartman+, 2009)
J/ApJ/703/L99 : Outlandish orbit of HAT-P-7b (Winn+, 2009)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d BJD Barycentric Julian Date (BJD-2454000)
11 A1 --- f_BJD [d] Observation not used in analysis
13- 19 F7.2 m/s RV [-409.37/286.48] Relative radial velocity (1)
21- 26 F6.2 m/s e_RV [15.65/115] Error in RV (2)
28- 33 F6.1 m/s BS [-350.1/283.5] Bisector span
35- 39 F5.1 m/s e_BS [22/514.8] Error in BS
41- 45 F5.3 --- Phase [0/1] Orbital phase
47- 53 A7 --- Inst Instrument (CYCLOPS, Coralie or FEROS) (3)
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Note (1): The zero point of these velocities is arbitrary. An overall
offset γrel fitted separately to the FIES, Keck, and CYCLOPS
velocities in Section 3.3 has been subtracted.
Note (2): Internal errors excluding the component of astrophysical/instrumental
jitter considered in Section 3.3.
Note (3): Instrument as follows:
CYCLOPS = Cassegrain fiber-system feeding the UCLES cross-dispersed Echelle
spectrograph on the 3.9m Anglo-Australian Telescope (AAT) at Siding
Spring Observatory (SSO), Australia. CYCLOPS delivers a spectral
resolution of λ/Δλ∼70000 with a total wavelength
range of 4540-7340Å (see Section 2.2.5 for more details).
Coralie = CORALIE fiber-fed Echelle spectrograph (with a design similar to
ELODIE; Baranne et al., 1996A&AS..119..373B 1996A&AS..119..373B) mounted on the Swiss 1.2m
Leonard Euler telescope in the ESO La Silla Observatory. The instrument
provides a resolution of ∼60000. The wavelength coverage of the object
fiber is ∼3850-6900Å (see Section 2.2.2 for more details).
FEROS = Fiber-fed Extended Range Optical Spectrograph located at the 2.2m
MPG/ESO telescope at the La Silla Observatory, Chile. The instrument
covers the wavelength range between 3500 and 9200Å at a resolving
power λ/Δλ of 48000 (details in Section 2.2.4).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 12 F12.5 d BJD Barycentric Julian Date (BJD-2400000)
14- 21 F8.5 mag mag Out-of-transit level subtracted magnitude (1)
23- 29 F7.5 mag e_mag Uncertainty in mag
31- 38 F8.5 mag Omag [-1.00323/10.3478]? Raw, observed magnitude (2)
40 A1 --- Flt [gri] Filter used (Sloan g, r or i)
42- 46 A5 --- Inst Instrument (FTS, GROND, HS, or Swope) (3)
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Note (1): For the HATSouth light curve (rows with "HS" in the Instrument column,
these magnitudes have been detrended using External Paramater Decorrelation
(EPD; removes correlations with external parameter, e.g., air mass or chip
position) and Trend Filtering Algorithm (TFA; removes trends shared with
other stars) 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 ∼ 79% 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): Without application of the External Paramater Decorrelation (EPD) and
TFA (Trend Filtering Algorithm) procedures. This is only reported for the
follow-up light curves.
Note (3): Instrument used to obtain the photometry as follows:
HS = HATSouth instrument (the HS1 in Chile, the HS3 in Namibia, or the HS5
in Australia).
FTS = Spectral instrument on the 2.0m Faulkes Telescope South (FTS; part of
the Las Cumbres Global Telescope Network) at Siding Spring Observatory
(SSO). Exposures were taken in r-band (2011 May 28) and i-band
(2011 July 5),See Section 2.3.2 for more details.
GROND = Gamma-Ray Burst Optical and Near-Infrared Detector on the MPG/ESO 2.2m
telescope at La Silla Observatory in Chile. A complete transit of HATS-1
was observed on 2012 January 21 in the Sloan g (λ=4550Å),
r (λ=6270Å), and i-bands (λ=7630Å). See Section 2.3.3
for more details.
Swope = The SITe3 camera on the Swope 1.0m telescope at Las Cumbres Observatory
(LCO) used on 2011 May 25 with the Sloan i filter is a 2048*3150 detector
with a pixel scale of 0.435" and a field of view of 14.8'*22.8' (see
Section 2.3.1 for more details).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 17-Feb-2014