J/AJ/155/79 RV & light curves data for 4 G-type dwarf stars (Henning+, 2018)
HATS-50b through HATS-53b: four transiting hot Jupiters orbiting G-type stars
discovered by the HATSouth survey.
Henning T., Mancini L., Sarkis P., Bakos G.A., Hartman J.D., Bayliss D.,
Bento J., Bhatti W., Brahm R., Ciceri S., Csubry Z., de Val-Borro M.,
Espinoza N., Fulton B.J., Howard A.W., Isaacson H.T., Jordan A., Marcy G.W.,
Penev K., Rabus M., Suc V., Tan T.G., Tinney C.G., Wright D.J., Zhou G.,
Durkan S., Lazar J., Papp I., Sari P.
<Astron. J., 155, 79 (2018)>
=2018AJ....155...79H 2018AJ....155...79H (SIMBAD/NED BibCode)
ADC_Keywords: Stars, G-type ; Stars, dwarfs ; Radial velocities ; Photometry ;
Optical ; Exoplanets
Keywords: stars: individual (HATS-50, HATS-51, HATS-52, HATS-53) -
techniques: photometric
Abstract:
We report the discovery of four close-in transiting exoplanets
(HATS-50b through HATS-53b), discovered using the HATSouth
three-continent network of homogeneous and automated telescopes. These
new exoplanets belong to the class of hot Jupiters and orbit G-type
dwarf stars, with brightness in the range V=12.5-14.0 mag. While
HATS-53 has many physical characteristics similar to the Sun, the
other three stars appear to be metal-rich ([Fe/H]=0.2-0.3), larger,
and more massive. Three of the new exoplanets, namely HATS-50b,
HATS-51b, and HATS-53b, have low density (HATS-50b: 0.39±0.10 MJ,
1.130±0.075 RJ; HATS-51b: 0.768±0.045 MJ, 1.41±0.19 RJ;
HATS-53b: 0.595±0.089 MJ, 1.340±0.056 RJ) and similar orbital
periods (3.8297 days, 3.3489 days, 3.8538 days, respectively).
Instead, HATS-52b is more dense (mass 2.24±0.15 MJ and radius
1.382±0.086 RJ) and has a shorter orbital period (1.3667 days). It
also receives an intensive radiation from its parent star and,
consequently, presents a high equilibrium temperature (Teq=1834±73 K).
HATS-50 shows a marginal additional transit feature consistent with an
ultra-short-period hot super Neptune (upper mass limit 0.16 MJ),
which will be able to be confirmed with TESS photometry.
Description:
The four stars were observed thousands of times by the HATSouth telescopes
between 2010 March and 2013 July. The data concerning all photometric
observations are available in electronic format in Table 4. Precise RV
measurements of the targets were then acquired by using several medium-
and large-class telescopes, equipped with high-resolution spectrographs and
working on wide ranges of optical wavelengths. In particular, we mainly
used the FEROS spectrograph (Kaufer & Pasquini 1998SPIE.3355..844K 1998SPIE.3355..844K),
which is mounted on the MPG 2.2 m telescope at the ESO Observatory in
La Silla, for monitoring the four targets. Other spectra were collected
thanks to CORALIE (Queloz et al. 2001Msngr.105....1Q 2001Msngr.105....1Q) on the Euler 1.2 m
telescope, HARPS (Mayor et al. 2003Msngr.114...20M 2003Msngr.114...20M) on the ESO 3.6 m
telescope, which are also located at the La Silla observatory, and CYCLOPS
mounted on the 3.9 m Anglo-Australian Telescope at SSO. For the case
of HATS-50, which is the faintest star of the four (V=14.0 mag), we needed
higher S/N measurements. These were obtained by taking seven spectra
with the HIRES spectrograph (Vogt et al. 1994SPIE.2198..362V 1994SPIE.2198..362V) on the
Keck I 10 m telescope at Mauna Kea Observatory in Hawaii.
Objects:
-------------------------------------------------------
RA (ICRS) DE Designation(s)
-------------------------------------------------------
20 01 42.73 -26 04 39.3 HATS-50 = GSC 06896-0101
06 51 23.40 -29 03 31.0 HATS-51 = GSC 06534-00607
09 20 21.05 -31 16 09.5 HATS-52 = GSC 07153-01785
11 46 30.84 -33 51 36.2 HATS-53 = GSC 07225-00413
-------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 31 4 List of stars
table3.dat 60 114 Relative radial velocities and bisector spans
for HATS-50 - HATS-53
table4.dat 58 55603 Light curve data for HATS-50, HATS-52
and HATS-53
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See also:
J/A+A/508/1509 : Sky maps for hot Jupiters (Heller+, 2009)
J/A+A/524/A25 : Radial Velocities on 6 exoplanet host stars (Triaud+, 2010)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Object identifier
9- 10 I2 h RAh Simbad Hour of Right Ascension (J2000)
12- 13 I2 min RAm Simbad Minute of Right Ascension (J2000)
15- 19 F5.2 s RAs Simbad Second of Right Ascension (J2000)
21 A1 --- DE- Simbad Sign of the Declination (J2000)
22- 23 I2 deg DEd Simbad Degree of Declination (J2000)
25- 26 I2 arcmin DEm Simbad Arcminute of Declination (J2000)
28- 31 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000)
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Object identifier (HATS-50, HATS-51, HATS-52
or HATS-53)
9- 18 F10.5 d BJD [6828.86592/7645.8947] Barycentric Julian Date
(BJD-2450000)
20- 20 A1 --- f_BJD [d] Flag on BJD (1)
22- 28 F7.2 m/s RV [-355.62/566.38] Radial velocity (2)
30- 34 F5.2 m/s e_RV [4.49/63] The 1σ uncertainty in RV (3)
36- 41 F6.1 m/s BS [-301/147]? Bisector span
43- 46 F4.1 m/s e_BS [10/68]? The 1σ uncertainty in BS
48- 52 F5.3 --- Phase [0/0.978] Orbital phase
54- 60 A7 --- Inst Instrument used
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Note (1): Flag as follows:
d = Observation excluded from the analysis due to very low S/N or substantial
sky contamination.
Note (2): The zero-point of these velocities is arbitrary. An overall offset
γrel fitted independently to the velocities from each instrument has
been subtracted.
Note (3): Internal errors excluding the component of astrophysical jitter are
considered in Section 3.3.
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Object identifier (HATS-50, HATS-52 or HATS-53)
9- 19 F11.5 d BJD [55274.29188/57433.38925] Barycentric Julian Date
(UTC ; BJD-2400000) (1)
21- 28 F8.5 mag mag [-0.06249/0.05087] Subtracted magnitude in Filter
(2)
30- 36 F7.5 mag e_mag [0.0005/0.03485] The 1σ uncertainty in mag
38- 45 F8.5 mag Omag [-0.02164/15.2]? Original magnitude (3)
47- 48 A2 --- Filter [r R Rc i] Filter used
50- 58 A9 --- Inst Instrument used
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Note (1): Computed directly from the UTC time without correction for leap
seconds.
Note (2): The out-of-transit level has been subtracted. For observations made
with the HATSouth instruments (identified by "HS" in the "Instrument" column),
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. The blend factors for the HATSouth light
curves are listed in Table 6. For observations made with follow-up instruments
(anything other than "HS" in the "Instrument" 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 (3): 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.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 08-Oct-2018