J/A+A/610/A20 HITEP. II. Transiting exoplanets imaging (Evans+, 2018)
High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP).
II. Lucky Imaging results from 2015 and 2016.
Evans D.F., Southworth J., Smalley B., Jorgensen U.G., Dominik M.,
Andersen M.I., Bozza V., Bramich D.M., Burgdorf M.J., Ciceri S.,
D'Ago G., Figuera Jaimes R., Gu S.-H., Hinse T.C., Henning Th.,
Hundertmark M., Kains N., Kerins E., Korhonen H., Kokotanekova R.,
Kuffmeier M., Longa-Pena P., Mancini L., MacKenzie J., Popovas A.,
Rabus M., Rahvar S., Sajadian S., Snodgrass C., Skottfelt J., Surdej J.,
Tronsgaard R., Unda-Sanzana E., von Essen C., Wang Y.-B., Wertz O.
<Astron. Astrophys. 610, A20 (2018)>
=2018A&A...610A..20E 2018A&A...610A..20E (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Exoplanets;
Positional data ; Photometry
Keywords: planets and satellites: dynamical evolution and stability -
planets and satellites: formation -
high angular resolution - binaries: visual
Abstract:
We present the results of the second part of a high resolution imaging
survey of hot Jupiter host stars. We search for binary companions to
known transiting exoplanet host stars, in order to determine the
multiplicity properties of hot Jupiter host stars. We also search for
and characterise unassociated stars along the line of sight, allowing
photometric and spectroscopic observations of the planetary system to
be corrected for contaminating light.
Description:
Tables 2 and 3 give our observing logs for 2015 and 2016 respectively,
giving the time of observation, exposure time, and resulting FWHM for
each target. Additionally, our detection limits from 0.5" to 20" are
given.
Table 4 gives the assumed stellar properties for each target, the
reddening value used, and the calculated distance to the system using
the literature stellar radius and the 2MASS K-band magnitude.
Tables 9 and 10 provide full listings of the detected companions for
2015 and 2016 respectively. Each companion is given an ID, which is
consistent between these two tables, and also the previous paper in
this series (Evans et al., 2016, Cat. J/A+A/589/A58). Astrometric and
photometric measurements are given for each companion, as well as the
projected separation and derived properties of the companion star
(unless photometry was only obtained in one band), including an
estimation of how likely the companion is to be at the same distance
as the target star.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 76 45 Observations and detection limits from 2015
table3.dat 76 80 Observations and detection limits from 2016
table4.dat 61 97 Assumed target properties and derived distances
table9.dat 104 317 Measurements and derived properties of
companions detected in 2015
table10.dat 104 482 Measurements and derived properties of
companions detected in 2016
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See also:
J/A+A/589/A58 : High-resolution imaging of TEP systems (HITEP) (Evans+, 2016)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Target name
10- 25 A16 --- ObsDate Date and time of observation, UTC
27- 29 I3 s ExpTime Exposure time
31- 34 F4.2 arcsec FWHM FWHM of stellar images in 1% best exposures
36- 40 F5.2 mag Limit005 5-sigma detection limit at 0.5"
42- 46 F5.2 mag Limit008 5-sigma detection limit at 0.8"
48- 52 F5.2 mag Limit015 5-sigma detection limit at 1.5"
54- 58 F5.2 mag Limit025 5-sigma detection limit at 2.5"
60- 64 F5.2 mag Limit050 5-sigma detection limit at 5.0"
66- 70 F5.2 mag Limit100 5-sigma detection limit at 10.0"
72- 76 F5.2 mag Limit200 5-sigma detection limit at 20.0"
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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- 8 A8 --- Name Target name
10- 13 F4.2 Rsun Rad Stellar radius from TEPCat
15- 18 F4.2 Rsun e_Rad Uncertainty on stellar radius
20- 23 I4 K Teff Stellar effective temperature from TEPCat
25- 27 I3 K e_Teff Uncertainty on stellar effective temperature
29- 33 F5.2 mag Kmag Ks magnitude from 2MASS
35- 38 F4.2 mag e_Kmag Uncertainty on Ks magnitude
40- 44 F5.3 mag E(B-V) ? Estimated E(B-V) reddening for star
46- 50 F5.3 mag e_E(B-V) ? Uncertainty on E(B-V)
52- 56 F5.1 pc Dist Estimated distance
58- 61 F4.1 pc e_Dist Uncertainty on estimated distance
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Byte-by-byte Description of file: table9.dat table10.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Target name
10- 11 I2 --- CompID Companion ID (common with Paper I and
table 9/10)
13- 19 F7.4 arcsec Sep Separation between target and companion
21- 26 F6.4 arcsec e_Sep Uncertainty in separation
28- 34 F7.3 deg PA ? Position angle of companion
36- 40 F5.3 deg e_PA ? Uncertainty in position angle
42- 46 I5 AU PrjSep ? Projected separation of companion
48- 52 I5 AU e_PrjSep ? Uncertainty on projected separation
54- 59 F6.2 mag deltaV ? Magnitude relative to target in TCI vis
61- 64 F4.2 mag e_deltaV ? Uncertainty on magnitude in TCI vis
66- 71 F6.2 mag deltaR Magnitude relative to target in TCI red
73- 76 F4.2 mag e_deltaR Uncertainty on magnitude in TCI red
78- 82 F5.2 mag visred ? Vis-Red colour
84- 87 F4.2 mag e_visred ? Uncertainty on Vis-Red colour
89- 93 I5 K Teff ? Estimated stellar temperature from colour
95- 98 I4 K e_Teff ? Uncertainty on stellar temperature
100-104 F5.1 --- sigmaDst ? Probability that companion has same
distance as target star (1)
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Note (1): The probability is expressed as a "sigma" value. A negative value
indicates the companion appears more distant, whilst a positive value
indicates the companion appears to be closer. A value near zero indicates
the two stars have similar distances, and may form a binary system.
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Acknowledgements:
Daniel Evans, d.f.evans(at)keele.ac.uk
References:
Evans et al., Paper I 2016A&A...589A..58E 2016A&A...589A..58E, Cat. J/A+A/589/A58
(End) Daniel Evans [Keele University, UK], Patricia Vannier [CDS] 25-Sep-2017