J/AJ/159/267 Observations & radial velocity of HATS-71b (Bakos+, 2020)
HATS-71b: a giant planet transiting an M3 dwarf star in TESS sector 1.
Bakos G.A., Bayliss D., Bento J., Bhatti W., Brahm R., Csubry Z.,
Espinoza N., Hartman J.D., Henning T., Jordan A., Mancini L., Penev K.,
Rabus M., Sarkis P., Suc V., de Val-Borro M., Zhou G., Butler R.P.,
Crane J., Durkan S., Shectman S., Kim J., Lazar J., Papp I., Sari P.,
Ricker G., Vanderspek R., Latham D.W., Seager S., Winn J.N., Jenkins J.,
Chacon A.D., Furesz G., Goeke B., Li J., Quinn S., Quintana E.V.,
Tenenbaum P., Teske J., Vezie M., Yu L., Stockdale C., Evans P.,
Relles H.M.
<Astron. J., 159, 267 (2020)>
=2020AJ....159..267B 2020AJ....159..267B
ADC_Keywords: Exoplanets; Stars, M-type; Photometry, UBVRI; Spectra, optical;
Radial velocities
Keywords: Exoplanets ; Exoplanet detection methods ; Transit photometry ;
Radial velocity ; Astronomical instrumentation ;
Observational astronomy
Abstract:
We report the discovery of HATS-71b, a transiting gas giant planet on
a P=3.7955day orbit around a G=15.35mag M3 dwarf star. HATS-71 is the
coolest M dwarf star known to host a hot Jupiter. The loss of light
during transits is 4.7%, more than in any other confirmed transiting
planet system. The planet was identified as a candidate by the
ground-based HATSouth transit survey. It was confirmed using
ground-based photometry, spectroscopy, and imaging, as well as
space-based photometry from the NASA Transiting Exoplanet Survey
Satellite mission (TIC234523599). Combining all of these data, and
utilizing Gaia DR2, we find that the planet has a radius of
1.024±0.018RJ and mass of 0.37±0.24MJ (95% confidence
upper limit of <0.80MJ), while the star has a mass of
0.4861±0.0060M☉ and a radius of 0.4783±0.0060R☉.
Description:
HATS-71 was initially detected as a transiting planet candidate based
on observations by the HATSouth network. A total of 26668 observations
were gathered at 4min cadence between UT2011-July-17 and
UT2012-October-25. The source was observed by the HS-1, HS-3, and HS-5
instruments (located in Chile, Namibia, and Australia, respectively)
in HATSouth field G755, and by the HS-2, HS-4, and HS-6 instruments
(located in Chile, Namibia, and Australia, respectively) in HATSouth
field G756.
Spectroscopic follow-up observations of HATS-71 were obtained with
Wide-Field Spectrograph (WiFeS) on the Australian National University
(ANU) 2.3m, the Planet Finder Spectrograph (PFS) on the Magellan 6.5m,
and Astronomy Research using the Cornell Infrared Imaging Spectrograph
(ARCoIRIS) on the Blanco 4m telescope. We obtained a spectrum at
resolution R∼3000.
Objects:
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RA (2000) DE Designation(s) (Period)
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01 02 12.28 -61 45 21.7 HATS-71 = HATS-71 (P = 3.7955)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 51 45060 Light curve data for HATS-71
table5.dat 43 8 Relative radial velocities and bisector spans from
PFS/Magellan for HATS-71
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See also:
II/328 : AllWISE Data Release (Cutri+ 2013)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/A+A/404/775 : Radial velocities of HD 41004A/B (Zucker+, 2003)
J/ApJ/706/785 : HAT-P-12 light curve (Hartman+, 2009)
J/ApJ/710/1724 : Follow-up photometry for HAT-P-11 (Bakos+, 2010)
J/A+A/546/A14 : Limb-darkening for CoRoT, Kepler, Spitzer (Claret+, 2012)
J/AJ/146/113 : Differential griz photometry of HATS-3 (Bayliss+, 2013)
J/A+A/552/A16 : Limb-darkening for CoRoT, Kepler, Spitzer. II. (Claret+, 2013)
J/AJ/145/5 : Follow-up photometry of HATS-1 (Penev+, 2013)
J/AJ/148/29 : Spectro. & differential photometry of HATS-4 (Jordan+, 2014)
J/AJ/149/166 : Photometry and spectroscopy of HATS-6 (Hartman+, 2015)
J/ApJ/800/85 : Teff, radii and luminosities of cool dwarfs (Newton+, 2015)
J/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfs (Benedict+, 2016)
J/AJ/152/108 : i filter photo. for HATS-25 through HATS-30 (Espinoza+, 2016)
J/AJ/152/88 : Spectroscopy & photometry of HATS-11 and HATS-12 (Rabus+,2016)
J/AJ/153/101 : Pleiades members stellar properties (Somers+, 2017)
J/A+A/618/A20 : Limb-darkening for TESS, Kepler, Corot, MOST (Claret, 2018)
J/A+A/619/A180 : Gaia DR2 photometric sensitivity curves (Maiz Apellaniz+,2018)
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/AJ/156/259 : Robo-AO detected close binaries in Gaia DR2 (Ziegler+, 2018)
J/AJ/157/55 : RVs and light curves for HATS-60-HATS-69 (Hartman+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.5 d BJD [55759/58379] Barycentric Julian Date, TDB
system w/leap second corrections, BJD-2400000
14- 21 F8.5 mag mag [-0.29/0.2] Out-of-transit subtracted magnitude (1)
23- 29 F7.5 mag e_mag [0.001/0.33] Uncertainty in mag
31- 38 F8.5 mag omag [14.2/29.2]? Raw magnitude in Filt (2)
40- 41 A2 --- Filt [I Rc T Un i r] Filter used in the observation
43- 51 A9 --- Inst Instrument (3)
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Note (1): The out-of-transit level has been subtracted. For
observations made with the HATSouth instruments these magnitudes have
been corrected for trends using the external parameter decorrelation
(EPD) and trend filtering algorithm (TFA) procedures applied prior to
fitting the transit model. This procedure may lead to an artificial
dilution in the transit depths when used in its plain mode, instead of
the signal reconstruction mode (Kovacs+, 2005MNRAS.356..557K 2005MNRAS.356..557K). The
blend factors for the HATSouth light curves are listed in Table4 in
the article. For observations made with follow-up instruments
(anything other than "HS" in the "Inst" column), the magnitudes have
been corrected for a quadratic trend in time, and for variations
correlated with up to three PSF shape parameters, fit simultaneously
with the transit.
Note (2): Raw magnitude values without correction for the quadratic
trend in time, or for trends correlated with the seeing. These are
only reported for the follow-up observations.
Note (3): Instruments as follows:
DK154 = Danish 1.54m telescope at La Silla Observatory in Chile;
ElSauce = 0.36m telescope at El Sauce Observatory in Chile;
HS/G755.4 = HATSouth network, field G755;
HS/G756.1 = HATSouth network, field G756;
Hazelwood = 0.32m telescope at Hazelwood Observatory in Victoria, Australia;
LCOGT1m = 1m telescopes from the Las Cumbres Observatory (LCOGT) network;
TESS = TESS Follow-up Program.
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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- 10 F10.5 d BJD [7022/7767] Barycentric Julian Date, BJD-2450000
12- 17 F6.2 m/s RVel [-95.5/199.8]? Radial velocity (1)
19- 23 F5.2 m/s e_RVel [15.8/22.8]? 1σ uncertainty in RVel (2)
25- 30 F6.1 m/s BIS [-817/3215]? Bisector span
32- 37 F6.1 m/s e_BIS [358/2050]? 1σ uncertainty in BIS
39- 43 F5.3 --- Phase [0.254/0.737] Orbital phase
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Note (1): The zero-point of these velocities is arbitrary. An overall
offset fitted independently to the velocities from each instrument has
been subtracted.
Note (2): Internal errors excluding the component of astrophysical
jitter considered in Section 3.1.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 27-Aug-2020