J/AJ/156/102 The TESS Input Catalog and Candidate Target List (Stassun+, 2018)
The TESS Input Catalog and Candidate Target List.
Stassun K.G., Oelkers R.J., Pepper J., Paegert M., De Lee N., Torres G.,
Latham D.W., Charpinet S., Dressing C.D., Huber D., Kane S.R., Lepine S.,
Mann A., Muirhead P.S., Rojas-Ayala B., Silvotti R., Fleming S.W.,
Levine A., Plavchan P.
<Astron. J., 156, 102-102 (2018)>
=2018AJ....156..102S 2018AJ....156..102S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, bright ; Stars, diameters ; Stars, masses ;
Photometry, infrared ; Photometry, SDSS ; Proper motions ;
Parallaxes, trigonometric ; Stars, distances ; Exoplanets
Keywords: stars: fundamental parameters
Abstract:
The Transiting Exoplanet Survey Satellite (TESS) will be conducting a
nearly all-sky photometric survey over two years, with a core mission goal
to discover small transiting exoplanets orbiting nearby bright stars.
It will obtain 30 minute cadence observations of all objects in the TESS
fields of view, along with two-minute cadence observations of 200000-400000
selected stars. The choice of which stars to observe at the two-minute
cadence is driven by the need to detect small transiting planets, which
leads to the selection of primarily bright, cool dwarfs. We describe the
catalogs assembled and the algorithms used to populate the TESS Input
Catalog (TIC), including plans to update the TIC with the incorporation
of the Gaia second data release (Cat. I/345) in the near future. We also
describe a ranking system for prioritizing stars according to the smallest
transiting planet detectable, and assemble a Candidate Target List (CTL)
using that ranking. We discuss additional factors that affect the ability
to photometrically detect and dynamically confirm small planets, and
we note additional stellar populations of interest that may be added
to the final target list. The TIC is available on the STScI MAST server,
and an enhanced CTL is available through the Filtergraph data visualization
portal system at the URL http://filtergraph.vanderbilt.edu/tess_ctl.
Description:
The TESS Input Catalog (TIC) is a catalog of luminous sources on the sky,
for use by the TESS mission to select target stars to observe, and to
provide stellar parameters essential for the evaluation of transit signals.
The purpose of the Candidate Target List (CTL) is to provide a subset of
TIC objects that can be used to select the target stars for TESS two-minute
cadence observations in service of the TESS mission's primary science
requirements, which are:
1. To search >200000 stars for planets with orbital periods less than
10 days and radii smaller than 2.5 R⊕.
2. To search for transiting planets with radii smaller than 2.5 R⊕
and with orbital periods up to 120 days, among 10000 stars in the
ecliptic pole regions.
3. To determine masses for at least 50 planets with radii smaller than
4 R⊕.
The CTL is provided for use through the Mikulski Archive for Space
Telescopes (hereafter, MAST) and for interactive use via the Filtergraph
data visualization system (Burger et al. 2013A&C.....2...40B 2013A&C.....2...40B). Table 9
summarizes the contents of the enhanced CTL provided via the Filtergraph
data visualization portal service at the URL
http://filtergraph.vanderbilt.edu/tess_ctl.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table9.dat 712 3751561 Candidate Target List (CTL) provided via the
Filtergraph data visualization portal service
--------------------------------------------------------------------------------
See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS)
(Sullivan+, 2015)
J/AJ/155/180 : A catalog of cool dwarf targets for the TESS
(Muirhead+, 2018)
J/ApJS/239/2 : Simulated exoplanets from TESS list of targets
(Barclay+, 2018)
http://filtergraph.com/tess_ctl : CTL filtergraph portal website
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.6 deg RAdeg Right Ascension in decimal degrees
(J2000)
12- 21 E10.4 deg DEdeg Declination in decimal degrees (J2000)
23- 30 F8.5 mag Tessmag [-1.254/23.446] Calculated TESS
magnitude
32- 39 F8.2 K Teff [-1/81300]? Effective temperature (1)
41- 57 E17.13 --- Prio [0/1] Priority based on T, radius, and
flux contamination with boosts and
deboosts
59- 69 F11.7 Rsun R* [0.0109362/724.005]? Stellar radius
derived from photometry
71- 86 F16.13 Msun M* [0.02/11.6775]? Stellar mass derived
from photometry
88-108 E21.16 --- Ratio [0/15758.3] Ratio of contaminating flux
to flux from the star
110-112 A3 --- Obs [yes no] Observed as part of the main
mission?
114 I1 --- Sector [1]? Number of TESS sector to observe
the star
116-125 E10.4 deg ECLON Longitude in the ecliptic coordinate
frame
127-136 E10.4 deg ECLAT Latitude in the ecliptic coordinate
frame
138-147 F10.6 deg GLON Longitude in the Galactic coordinate
frame
149-158 E10.4 deg GLAT Latitude in the Galactic coordinate
frame
160-164 A5 --- Class Luminosity class (dwarf or giant)
166-176 E11.6 mas plx [9.95627e-05/772.33]? Parallax of the
star provided by either TGAS/Gaia
(Cat. I/337) or Hipparcos (Cat. I/239)
178-196 F19.12 pc Dist [0.371129/830806]? Distance of the star
provided
198-210 F13.7 mas/yr pm [0.0184036/10358]? Total proper motion
of the star
212-220 F9.6 mag Vmag [-0.15/20.92]? Adopted V magnitude
222-227 F6.3 mag Jmag [-2.652/18.208]? 2MASS J magnitude
229-234 F6.3 mag Hmag [-3.732/17.943]? 2MASS H magnitude
236-241 F6.3 mag Ksmag [-4.227/17.564]? 2MASS KS magnitude
243-250 F8.5 mag Gmag [3.21588/21.2367]? Gaia magnitude
252-259 F8.5 mag umag [6.7823/30]? SDSS u magnitude
261-268 F8.5 mag gmag [6.83111/30]? SDSS g magnitude
270-277 F8.5 mag rmag [4.48654/30]? SDSS r magnitude
279-286 F8.5 mag imag [6.06096/30]? SDSS i magnitude
288-295 F8.5 mag zmag [5.35828/30]? SDSS z magnitude
297-302 F6.3 mag W1mag [-2.335/17.416]? ALLWISE W1 magnitude
304-309 F6.3 mag W2mag [-2.827/17.9]? ALLWISE W2 magnitude
311-316 F6.3 mag W3mag [-5.568/13.973]? ALLWISE W3 magnitude
318-323 F6.3 mag W4mag [-6.034/10.417]? ALLWISE W4 magnitude
325-330 I6 --- HIP [1/120401]? Hipparcos identifier
332-343 A12 --- TYC2 Tycho-2 identifier (FFFF-NNNNN-N)
345-361 A17 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs)
363-371 I9 --- TIC [101/471016765]? TESS Input Catalog
identifier
373-395 A23 --- List Identifies whether a star is in
a special list (2)
397-419 E23.18 --- Prio-TIC4 [0/2.75327e+06]? Priority based on
the TIC-4 schema
420 A1 --- n_Prio-TIC4 [I] I for infinity
422-438 E17.12 --- Prio-TIC5 [0/1.09693] Priority based on the TIC-5
schema
440-456 E17.15 --- Prio-TIC6 [0/1.4703]? Priority based on the TIC-6
schema
458-474 E17.12 --- Prio-NoCont [0/1]? Priority without neighbor
contamination
476-492 E17.12 --- Prio-NoBoost [0/1]? Priority without sector boosting
494-501 A8 --- r_Teff Source of the effective temperature (3)
503-510 A8 --- StarFlag Adopted stellar parameters source (3)
512-523 F12.8 Rsun e_R* [0.00110977/126.407]? Uncertainty in R*
525-533 F9.7 Msun e_M* [0.001/4.505]? Uncertainty in M*
535-549 F15.7 [cm/s2] logg [-0.986542/8.64298]? Surface gravity
(in cgs units)
551-561 F11.8 [cm/s2] e_logg [-0.986542/4.96531]? Uncertainty in logg
563-579 E17.12 Sun rho [5.19144e-09/1.46449e+06]? Density ρ
in solar units
581-591 E11.6 Sun e_rho [1.42169e-09/445836]? Uncertainty in rho
593-615 F23.15 Lsun Lum [0.000206110/2.07309e+06]? Luminosity
in solar units
617-633 E17.12 Lsun e_Lum [4.49745e-05/378481]? Uncertainty in
Lum
635-651 E17.12 --- NoiseSt [8.89866e-07/0.111768] Uncertainty from
the star
653-669 E17.15 --- NoiseCont [0/3.3348] Uncertainty from the
neighboring star
671-688 E18.13 --- NoiseSky [2.7603e-08/24.0759] Uncertainty from
the sky
690-706 E17.12 --- NoiseRead [2.81881e-09/9.17964] Uncertainty in
the detector readout
708-712 E5.1 --- NoiseSyst [6e-05] Uncertainty floor
--------------------------------------------------------------------------------
Note (1): Adopted "best" value from (in order of preference): (1) Cool Dwarf
list; (2) spectroscopic; (3) dereddened photometric value; (4) non-dereddened
photometric value. See "r_Teff" column.
Note (2): The Cool Dwarf list, the Bright Star list, the Hot Subdwarf list, or
the list of Known Exoplanet Hosts; or multiple lists.
Note (3): Source as follows:
cdwrf = Cool Dwarf list (Muirhead et al. 2018, J/AJ/155/180);
dered = Dereddened V-Ks color;
hotsdwrf = Hot Subdwarf list;
kplnt = Known Planet Host list;
nondered = Non-dereddened V-Ks color;
spec = Torres et al. (2010, J/other/A+ARv/18.67);
hplx = HIP parallax;
spline = Unified empirical spline relation;
tplx = TGAS parallax;
plx = Parallax.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 04-Apr-2019