IV/39 TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)
TESS Input Catalog versions 8.1 and 8.2: phantoms in the 8.0 catalog and how to
handle them.
Paegert M., Stassun K.G., Collins K.A., Pepper J., Torres G., Jenkins J.,
Twicken J.D., Latham D.W.
=2021arXiv210804778P 2021arXiv210804778P
=2022yCat.4039....0P 2022yCat.4039....0P
ADC_Keywords: Stars, nearby; Stars, bright; Cross identifications;
Stars, diameters; Stars, masses; Photometry, infrared;
Photometry, SDSS; Proper motions; Parallaxes, trigonometric;
Stars, distances; Exoplanets
Mission_Name: TESS
Keywords: Astrophysics - Earth and Planetary Astrophysics;
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract:
We define various types of "phantom" stars that may appear in the TESS
Input Catalog (TIC), and provide examples and lists of currently known
cases. We present a methodology that can be used to check for phantoms
around any object of interest in the TIC, and we present an approach
for correcting the TIC-reported flux contamination factors
accordingly. We checked all 2077 TESS Objects of Interest (TOIs) known
as of July 21st 2020 (Sectors 1 to 24) and sent corrections for
291 stars to MAST where they are integrated into the publicly
available TIC-8, updating it to TIC 8.1. We used the experience gained
to construct an all-sky algorithm searching for "phantoms" which led
to 34 million updates integrated into TIC 8.2.
Description:
TIC v8 was updated twice (2020 April (v8.1) and 2021 July (v8.2)) to
identify objects that are included in the TIC, but are actually
spurious objects or related to other TIC stars in a non-trivial,
non-astrophysical way. The general categories for these objects are
"split", "join", and "artifact". Changes to the affected objects are
reflected in the "disposition" and/or "duplicate ID" fields of their
TIC entries.
For a complete discussion of the TIC 8.1 and 8.2 updates, please refer
to Paegert+ (2021, arXiv:2108.04778):
Section 3.1.1 deals with artifacts, Section 3.1.2 covers joins, and
Section 3.1.3 describes splits.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tic82.sam 1180 1000 Transiting Exoplanet Survey Satellite (TESS)
Input Catalog - v8.2 (TIC-8.2), sample outpout
(on a total of 1,727,987,580 sources)
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/AJ/156/102 : The TESS Input Catalog & Candidate Target List (Stassun+, 2018)
http://outerspace.stsci.edu/display/TESS/
TIC+v8.2+and+CTL+v8.xx+Data+Release+Notes : TESS archive v8.2 documentation
Byte-by-byte Description of file: tic82.sam
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 I11 --- TIC [1/10005000540] TESS Input Catalog
identifier ( ID ) (1)
13- 27 F15.11 deg RAdeg Right Ascension (J2000) (ra) (2)
29- 43 F15.11 deg DEdeg Declination (J2000) (dec) (2)
45- 50 I6 --- HIP [1/120404]? Hipparcos identifier
52- 63 A12 --- TYC Tycho2 identifier
65- 74 A10 --- UCAC4 UCAC4 identifier (UCAC)
76- 92 A17 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs, J2000)
(TWOMASS)
94- 112 I19 --- objID ? SDSS DR9 object identifier "objID"
114- 132 A19 --- WISEA ALLWISE identifier (JHHMMSS.ss+DDMMSS.s)
(ALLWISE)
134- 152 I19 --- GAIA ? GAIA DR2 identifier
154- 161 I8 --- APASS [1/61176401]? APASS DR9 identifier (3)
163- 170 I8 --- KIC [1/13161029]? KIC identifier
172- 179 A8 --- S/G Object Type (stellarity: "STAR" or
"EXTENDED") (objType)
181- 191 A11 --- Ref The source of the object in the TIC
(typeSrc)
193- 203 A11 --- r_Pos Source of the position (POSflag) (4)
205- 213 F9.3 mas/yr pmRA [-4411/6766]? Proper motion in Right
Ascension
215- 221 F7.3 mas/yr e_pmRA [0/200]? Uncertainty in pmRA
223- 231 F9.3 mas/yr pmDE [-5818/10363]? Proper motion in
Declination (pmDEC)
233- 238 F6.3 mas/yr e_pmDE [0.01/99]? Uncertainty in pmDE (e_pmDEC)
240- 245 A6 --- r_pm Source of the proper motion (PMflag) (4)
247- 256 F10.4 mas Plx [-1857/1852]? Parallax (plx) (5)
258- 264 F7.4 mas e_Plx [0.009/94]? Error in the parallax (e_plx)
266- 270 A5 --- r_Plx Source of the parallax (PARflag) (4)
272- 286 F15.11 deg GLON Galactic Longitude (gallong)
288- 302 F15.11 deg GLAT Galactic Latitude (gallat)
304- 318 F15.11 deg ELON Ecliptic longitude (eclong)
320- 334 F15.11 deg ELAT Ecliptic Latitude (eclat)
336- 341 F6.3 mag Bmag [-6.7/50]? Johnson B magnitude (6)
343- 348 F6.3 mag e_Bmag [-10/26.1]? Uncertainty in Bmag (26)
350- 355 F6.3 mag Vmag [-0.11/23.1]? Johnson V magnitude (7)
357- 362 F6.3 mag e_Vmag [-0.7/7]? Uncertainty in Vmag (26)
364- 369 F6.3 mag umag [5.3/30]? SDSS u-band (AB) magnitude
371- 379 F9.3 mag e_umag [0/50260]? Uncertainty in umag
381- 386 F6.3 mag gmag [5.4/30]? SDSS g-band (AB) magnitude
388- 396 F9.3 mag e_gmag [0/27628]? Uncertainty in gmag
398- 403 F6.3 mag rmag [4/30]? SDSS r-band (AB) magnitude
405- 413 F9.3 mag e_rmag [0/91514]? Uncertainty in rmag
415- 420 F6.3 mag imag [3.9/30]? SDSS i-band (AB) magnitude
422- 430 F9.3 mag e_imag [0/63182]? Uncertainty in imag
432- 437 F6.3 mag zmag [4.3/30]? SDSS z-band (AB) magnitude
439- 447 F9.3 mag e_zmag [0/63182]? Uncertainty in zmag
449- 454 F6.3 mag Jmag [-3/26]? 2MASS Johnson J-band magnitude
456- 460 F5.3 mag e_Jmag [0/10]? Uncertainty in Jmag
462- 467 F6.3 mag Hmag [-4.1/24.3]? 2MASS Johnson H-band magnitude
469- 473 F5.3 mag e_Hmag [0/10]? Uncertainty in Hmag
475- 480 F6.3 mag Kmag [-4.4/25]? 2MASS Johnson Ks-band magnitude
482- 486 F5.3 mag e_Kmag [0/10]? Uncertainty in Kmag
488- 506 A19 --- q_2MASS Quality Flags for 2MASS (TWOMflag) (8)
508- 513 F6.3 mag W1mag [-2.4/19.4]? AllWise W1 (3.4um) magnitude
515- 519 F5.3 mag e_W1mag [0.001/0.6]? Uncertainty in W1mag
521- 526 F6.3 mag W2mag [-2.9/23.4]? AllWise W2 (4.6um) magnitude
528- 532 F5.3 mag e_W2mag [0.001/0.6]? Uncertainty in W2mag
534- 539 F6.3 mag W3mag [-8.7/22.8]? AllWise W3 (12.0um) magnitude
541- 545 F5.3 mag e_W3mag [0.001/0.6]? Uncertainty in W3mag
547- 552 F6.3 mag W4mag [-8.3/22.6]? AllWise W4 (22.Oum) magnitude
554- 558 F5.3 mag e_W4mag [0.001/0.6]? Uncertainty in W4mag
560- 568 F9.6 mag Gmag [1.7/23.5]? GAIA DR2 G magnitude (GAIAmag)
570- 577 F8.6 mag e_Gmag [0/2.4]? Uncertainty in Gmag (e_GAIAmag)
579- 584 F6.3 mag Tmag [-1.8/27.4] TESS magnitude (9)
586- 591 F6.3 mag e_Tmag [0.006/50]? Uncertainty in Tmag
593- 597 A5 --- f_Tmag TESS magnitude flag (TESSflag) (10)
599- 603 A5 --- Flag Stellar properties flag (SPFlag) (4)
605- 611 F7.1 K Teff [2717/79742]? Effective temperature (11)
613- 619 F7.1 K s_Teff [0/27791]? Uncertainty in Teff
( e_Teff ) (12)
621- 626 F6.4 [cm/s2] logg [3/6.6]? Log of the surface gravity (13)
628- 633 F6.4 [cm/s2] s_logg [0.0004/4.9]? Uncertainty in logg
( e_logg ) (12)
635- 641 F7.4 [Sun] [M/H] [-4.7/1.4]? Metallicity (MH) (14)
643- 648 F6.4 [Sun] e_[M/H] [0.001/0.5]? Uncertainty in [M/H]
(e_MH) (15)
650- 657 F8.3 Rsun Rad [0.05/2753]? Radius (rad) (16)
659- 664 F6.3 Rsun s_Rad [0.001/13]? Uncertainty in Rad
( e_rad ) (12)
666- 670 F5.3 Msun Mass [0.08/3.3]? Mass (17)
672- 676 F5.3 Msun s_Mass [0.01/1.7]? Uncertainty in Mass
( e_mass ) (12)
678- 686 F9.4 Sun rho [0.008/2538]? Stellar density in solar
units (Mass/Rad^3)
688- 696 F9.4 Sun s_rho [0.001/2538]? Uncertainty in rho
( e_rho ) (12)
698- 705 A8 --- LClass Luminosity Class (lumclass) (18)
707- 716 F10.5 Lsun Lum [0/5917]? Stellar luminosity;
Rad2*(Teff/5772)4
718- 727 F10.5 Lsun s_Lum [0/5764]? Uncertainty in Lum ( e_lum ) (12)
729- 740 F12.4 pc Dist [1/1567769]? Distance from
Bailer-Jones+ (2018, I/347) (d)
742- 753 F12.4 pc s_Dist [0.0003/1565730]? Uncertainty in Dist
(e_d) (12)
755- 761 F7.4 mag E(B-V) [0/47.4]? Applied color excess (ebv) (19)
763- 769 F7.4 mag s_E(B-V) [0/20]? Uncertainty in E(B-V) (e_ebv) (12)
771- 775 I5 --- Ncont [6/15080]? Number of contaminants found
within 10" of the star, used in the
calculation of the contamination ratio
(numcont)
777- 786 F10.4 --- Rcont [0/40556]? Contamination ratio
(contratio) (20)
788- 796 A9 --- Disp Disposition type (disposition) (21)
798- 808 I11 --- m_TIC [42/10005000536]? TIC ID of the 'other'
object in DUPLICATE, or SPLIT set of stars
(duplicate_id)
810- 817 F8.6 --- Prior [0/0.13]? Priority (1= highest priority)
(priority) (22)
819- 825 F7.4 mag e_E(B-V) [-0.03/22]? Negative error for E (B-V)
(eneg_EBV)
827- 833 F7.4 mag E_E(B-V) [-0.04/35]? Positive error for E (B-V)
(epos_EBV)
835- 843 A9 --- f_E(B-V) Source of E (B-V) (EBVflag) (23)
845- 849 F5.3 Msun e_Mass [0/2]? Negative error for Mass (eneg_Mass)
851- 855 F5.3 Msun E_Mass [0.03/2]? Positive error for Mass
(epos_Mass)
857- 861 F5.3 Rsun e_Rad [0.008/3.1]? Negative error for Radius
(eneg_Rad)
863- 868 F6.3 Rsun E_Rad [0.01/24]? Positive error for Radius
(epos_Rad)
870- 877 F8.4 Sun e_rho [0/227]? Negative error for Density
(eneg_rho)
879- 886 F8.4 Sun E_rho [0.001/227]? Positive error for Density
(epos_rho)
888- 893 F6.4 [cm/s2] e_logg [0.02/1.7]? Negative error for Surface
Gravity (eneg_logg)
895- 900 F6.4 [cm/s2] E_logg [0.01/0.7]? Positive error for Surface
Gravity (epos_logg)
902- 911 F10.5 Lsun e_Lum [0/1424]? Negative error for Luminosity
(eneg_lum)
913- 922 F10.5 Lsun E_Lum [0.001/2352]? Positive error for
Luminosity (epos_lum)
924- 933 F10.4 pc e_Dist [0.0003/19098]? Negative Error for
Distance (eneg_dist) (24)
935- 948 F14.4 pc E_Dist [0.0003/155560992]? Positive Error for
Distance (epos_dist) (24)
950- 955 A6 --- r_Dist Source of distance (distflag) (4)
957- 962 F6.1 K e_Teff [7/6390]? Negative error for effective
temperature (eneg_Teff)
964- 969 F6.1 K E_Teff [10/4809]? Positive error for effective
temperature (epos_Teff)
971- 976 A6 --- r_Teff Source of effective Temperature
(Tefflag) (4)
978- 986 F9.6 mag BPmag [2.5/25.4]? Gaia Bp magnitude (gaiabp)
988- 995 F8.6 mag e_BPmag [0/9]? Error in Bpmag (e_gaiabp)
997- 1005 F9.6 mag RPmag [0.001/28.8]? Gaia Rp magnitude (gaiarp)
1007- 1015 F9.6 mag e_RPmag [0/50]? Error in Rpmag (e_gaiarp)
1017- 1018 I2 --- q_Gaia [-1/1]? Quality of Gaia information
(gaiaqflag) (25)
1020- 1030 A11 --- r_Vmag Source of V magnitude (VmagFlag) (4)
1032- 1039 A8 --- r_Bmag Source of B magnitude (BmagFlag) (4)
1041- 1055 A15 --- Clist Identifies if star is in a specially
curated list (splits)
1057- 1074 F18.11 mas e_RAdeg [4.6e-5/281160]? Error in RAdeg (e_RA)
1076- 1093 F18.11 mas e_DEdeg [4e-5/241060]? Error in DEdeg (e_Dec)
1095- 1109 F15.11 deg RAOdeg ? RA from original catalog (RA_orig)
1111- 1125 F15.11 deg DEOdeg ? Dec from original catalog (Dec_orig)
1127- 1144 F18.11 mas e_RAOdeg [4.6e-5/281160]? RA error as given in
original catalog (eRAorig)
1146- 1163 F18.11 mas e_DEOdeg [4e-5/241060]? DEC error as given in
original catalog (eDecorig)
1165- 1166 I2 --- RadFl [-1/1]? 1=dwarf by radius, 0=giant by
radius (raddflag)
1168- 1169 I2 --- WDFl [-1/1]? 1=star in Gaia's photometric White
Dwarf region (wdflag)
1171- 1180 I10 --- ID [1/1727987580] Object identifier ( objID )
--------------------------------------------------------------------------------
Note (1): A unique identifier for every object in the TIC. The ID is unique and
permanent. If an object is removed from the TIC in later versions, a
new object will never inherit an old ID.
Note (2): The right ascension and declination are provided in epoch 2000 due
to mission requirements.
Users are requested to use the original catalog right ascension
(column RAOdeg, DEOdeg) when propagating positions forward.
Note (3): APASS stars do not have identifiers, only coordinates. The primary
key of an internal TIC version of the APASS database table as a proxy
identifier.
Note (4): Reference as follows:
gaia2 = from Gaia DR2 (see I/345)
hip = from Hipparcos (see I/239)
cooldwarfs = stellar source is the cool dwarf list
(Muirhead+, 2018, J/AJ/155/180)
cdwarf = from the cool dwarf catalog (TICv6;
see Stassun+ 2018AJ....156..102S 2018AJ....156..102S)
cdwrf = from the cool dwarf catalog (TICv7;
see Stassun+ 2018AJ....156..102S 2018AJ....156..102S)
2mass = 2MASS (see II/246)
lepine = Lepine (2011, J/AJ/142/138) All-sky Catalog of Bright M Dwarfs
tmgaia = Gaia DR1 (I/337) with unique 2MASS match
tmgaia2 = Gaia DR2 with unique 2MASS match
tmmgaia = Gaia without unique 2MASS match
hotsubdwarf = hot subdwarf list
hotsd = hot subdwarf list
gicycle1 = the GI cycle 1 program
gistars8 = the GI cycle 2 program
Astroseis = from the asteroseismology group
2MASSEXT = extended source from 2MASS extended source catalog
tgas = from Tycho2-Gaia Astrometric Solution
sblink = from SuperBlink
tycho2 = from Tycho 2 (see I/259)
tycho2v3 = V magnitude calculated from Tycho2 Vt
tycho2b3 = B magnitude calculated from Tycho2 Bt
tycho2b = B magnitude calculated from Tycho2 Bt
tycho = B magnitude calculated from Tycho2 Bt
ucac5 = from UCAC5
ucac4 = from UCAC4 (see I/322)
hsoy = from Hot Stuff for One Year (Altmann+, 2017, I/339)
tic7 = TICv7
spect = from a spectroscopic catalog
apassdr9 = magnitude adopted from APASS DR-9 (II/336)
apass = V magnitude adopted from APASS DR-7
sblink = from SuperBlink
mermil = magnitude adopted from the Mermilliod catalog
sirful = V magnitude adopted from the Sirful catalog
hipvmag = V magnitude calculated from Hipparcos
gaiak = magnitude calculated from Gaia DR-1 G and 2MASS Ks
bpbj = B magnitude calculated from 2MASS photometric B
bj2018 = Bailer-Jones+ 2018AJ....156...58B 2018AJ....156...58B (Cat. I/347).
See the appendix of the full documentation for a more comprehensive
description of each source (Stassun+, 2019AJ....158..138S 2019AJ....158..138S).
Note (5): The vast majority of stars have parallaxes provided by Gaia DR2.
Please note, in some cases, these parallaxes may be unphysical
(negative), but they are reported identical to what is provided in
Gaia DR2. In cases where a star does not have a parallax in Gaia DR2,
the parallaxes were adopted following the order of preference used in
TICv7 described in Stassun+ (2018AJ....156..102S 2018AJ....156..102S ; see J/AJ/156/102).
Note (6): When an observed optical B magnitude is not provided, a B magnitude
is calculated following the relations implemented for TICv7 described
in Stassun+ (2018, J/AJ/156/102).
Note (7): Observed V magnitudes are preferred when they are converted from
Tycho Vt, Hipparcos or UCAC. Otherwise, a Johnson V magnitude is
calculated from the Gaia colors (G, Bp, Rp) for stars that do not have
a reliable observed Johnson V magnitude. If a star does not have a
reliable Gaia color, the V magnitude is calculated following the
relations implemented for TICv7 described in Stassun+ (2018, J/AJ/156/102).
Note (8): Quality flag (phqual-rdflag-blflg-ccflg-galcontam-mpflag) from
2MASS, see II/246 (notes 5-8 and 10).
Note (9): The Tmag values are typically based on relations that depend on
Gaia Bp and Rp magnitudes (see section 3.2.1 in the full documentation
for the relation). TESS magnitudes for objects without appropriate
Gaia Bp or Rp magnitude had their TESS magnitudes calculated using
relations implemented for TICv7 described in Stassun+ (2018, J/AJ/156/102).
Stars which were in the specially curated hot subdwarfs, and cool
dwarfs lists had their TESS magnitudes directly adopted.
Note (10): The TESSflag denotes which relation, or catalog, provides the TIC
TESS magnitude. Full descriptions can be found in Section 2.3.1 of the
full documentation. Code as follows:
goffs = magnitude from offset from Gaia
gpbr = magnitude from cooldwarfs
gbprp = magnitude calculated from observed Gaia Bp-Rp
rered = magnitude calculated after de-reddening Gaia Bp-Rp and
re-reddening the result
hotsd = magnitude from the hot subdwarf list
cdwrf = magnitude from cool dwarf list (Muirhead+, 2018, J/AJ/155/180)
Flags described in TICv7 documentation
gaiav = magnitude calculated from G and V
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
gaiaj = magnitude calculated from G and 2MASS J
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
gaiah = magnitude calculated from Gaia and 2MASS H
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
gaiak = magnitude calculated from G and 2MASS Ks
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
voffset = magnitude calculated from V and offset
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
gaiaoffset = magnitude calculated from G and an offset
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
joffset = magnitude calculated from 2MASS J offset (+0.5 for J-Ks<-0.1)
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
joffset2 = magnitude calculated from 2MASS J and an offset
(+1.75 for J-Ks>1) (see Stassun+ 2018, J/AJ/156/102
and 2019AJ....158..138S 2019AJ....158..138S)
hoffset = magnitude calculated from 2MASS H offset
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
koffset = magnitude calculated from 2MASS Ks and offset
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
vjh = magnitude calculated from V and 2MASS J-H
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
jhk = magnitude calculated from 2MASS J-Ks
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
vjk = magnitude calculated from V and 2MASS J-Ks
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
jh = magnitude calculated from 2MASS J-H
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
tmvk = magnitude calculated from V and 2MASS Ks (same as vk)
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
bpjk = magnitude calculated from photographic B and 2MASS J-Ks
(see Stassun+ 2018, J/AJ/156/102 and 2019AJ....158..138S 2019AJ....158..138S)
fromapassi = magnitude from cool dwarf list (Muirhead+, 2018, J/AJ/155/180)
fromsdssik = magnitude from cool dwarf list (Muirhead+, 2018, J/AJ/155/180)
wmeanvkjhk = magnitude from cool dwarf list (Muirhead+, 2018, J/AJ/155/180)
Note (11): The effective temperatures come from one of four sources, in the
following order of preference: (1) the Cool Dwarf list or the Hot
Subdwarf list; (2) spectroscopic catalogs (see Column "SPFlag");
(3) dereddened Bp-Rp color (column "gaiabp", "gaiarp"); and
(4) non-dereddened Bp-Rp color (column "gaiabp", "gaiarp").
Note (12): The error provided for Teff, Rad, Mass, rho, Lum, Dist, E(B-V) are
symmetrized errors, calculated by arithmetic mean of the asymmetric
errors. It is possible these errors may be larger than their values.
Users are cautioned this means the reported value is of untrustworthy.
Note (13): The surface gravity is calculated using the nominal formula:
log10(G*M*Msun/(R*Rsun)2). Where Msun is the mass of the Sun, G is
the gravitational constant, Rsun is the Radius of the Sun, M is the
mass of the star (column "Mass"), and R is the radius of the star
(column "Rad"). Some stars may have unphysical log(g) values for their
estimated temperature, such as log(g)>5, but these log(g) values
should be internally consistent with the provided mass and radii of
each star. The surface gravities provided are not the values reported
by spectroscopic catalogs; they are always calculated from the
reported masses and radii of a given object.
Note (14): The metallicity is only provided if it was reported in a
spectroscopic catalog (see Table 1 below) matched to TICv8, using the
order preference described in section 2 of the full documentation. If
a catalog provided more than one measurement of the metallicity for
the a single object, the metallicities were combined using a
weighted-mean. These metallicities were not used in any calculation,
are only provided for convenience, and may conflict with reported
masses and radii -- especially for very metal rich or very metal poor
stars. Users are cautioned against using the reported metallicities
with the calculated TICv8 stellar parameters, without additional
vetting.
-------------------------------------------------------------------------------
Table 1: spectroscopic catalogs in the TIC
-------------------------------------------------------------------------------
Name Data Approximate Priority References
Release No. of Stars
-------------------------------------------------------------------------------
SPOCS --- 1.6k 1 Brewer+ 2016, J/ApJS/225/32
PASTEL --- 93k 2 Soubiran+, 2016-, B/pastel
Gaia-ESO DR3 29k 3 Gilmore+ 2012Msngr.147...25G 2012Msngr.147...25G
TESS-HERMES DR1 25k 4 Sharma+ 2018MNRAS.473.2004S 2018MNRAS.473.2004S
GALAH DR2 340k 5 Buder+, 2018, J/MNRAS/478/4513
APOGEE-2 DR14 277k 6 Abolfathi+ 2018ApJS..235...42A 2018ApJS..235...42A
LAMOST DR4 2.9M 7 Luo+, 2015, V/146
RAVE DR5 484k 8 Kunder+ 2017, III/279
Geneva-Copenhagen DR3 16k 9 Holmberg+, 2009, V/130
-------------------------------------------------------------------------------
Note (15): For stars with spectroscopic metallicity from a single observation,
the error was copied from the relevant catalog. The SPOCS and GALAH
catalogs do not provide uncertainties for metallicities; 0.10 and
0.05dex were assigned, respectively, based on the reported statistical
error from these catalogs.
Note (16): The vast majority of stellar radii in TICv8 were estimated using
three techniques, in the following order of preference:
(1) radii provided by the specially curated Cool Dwarf list
(see Appendix A of Stassun+ 2019AJ....158..138S 2019AJ....158..138S);
(2) radii provided in the Hot Subdwarf list; or
(3) using the Gaia distance, bolometric corrections, G magnitude, and
a preferred temperature.
(4) Some stars had their properties either imported directly from
TICv7, or calculated using TICv7 relationships, if their Gaia
parameters were deemed unreliable enough to determine stellar
characteristics (column "gaiaqflag"=0). Users are directed to
Stassun+ (2018AJ....156..102S 2018AJ....156..102S) for a detailed description of the
relations used to estimate these radii.
Note (17): The stellar masses were estimated using three techniques:
(1) masses provided in the specially curated cool dwarf list
(see Appendix A of Stassun+ 2019AJ....158..138S 2019AJ....158..138S);
(2) masses provided in the specially curated hot subdwarf list; or
(3) using a unified relation based on measured masses for eclipsing
binaries as well as simulations using Galactic structure models (see
also section 2.3.5 in Stassun+ 2019AJ....158..138S 2019AJ....158..138S).
Note (18): LClass flag denotes the luminosity class of the star. These flags are
defined as follows:
DWARF = the star has a radius smaller than the line in Figure 10 of
the full documentation (Stassun+ 2018, J/AJ/156/102)
GIANT = the star has a radius larger than the line in Figure 10 of
the full documentation (Stassun+ 2018, J/AJ/156/102)
rpmjdwarf = the star has unreliable Gaia information, but the reduced proper
motion calculated in TICv7 identifies the star as a dwarf.
rpmjgiant = the star has unreliable Gaia information, but the reduced proper
motion calculated in TICv7 identifies the star as a giant.
Stars with the flags of rpmjdwarf and rpmjgiant are assumed to be a
dwarf, or giant stars based on their reduced proper motion in
coordination with their 2MASS J magnitude (see Stassun+ 2018, J/AJ/156/102).
Users should be aware the rpmjdwarf flag effectively means that the
star is either a dwarf or a subgiant, based on reduced proper motion cuts.
Note (19): Wherever possible we de-reddened adopted used E(B-V) from the
Pan-STARRS dust map and the Schlegel+ (1998ApJ...500..525S 1998ApJ...500..525S) map where
either the star is outside the Pan-STARRS footprint. The extinction
value for stars with distances less than 100pc has been set to 0. We
applied a correction factor of 0.884 for the conversion from Schlegel
to Schlafly & Finkbeiner (2011ApJ...737..103S 2011ApJ...737..103S ). Values based on
Schlegel have been corrected for the distance, values based on
Pan-STARRS depend intrinsically on distance. Column "EBVFlag"
indicates which of the dustmaps would be used for dereddening. Please
note that dereddening corrections are only applied if the Gaia quality
flag is 1.
Note (20): The contamination ratio is defined as the nominal flux from the
contaminants divided by the flux from the source. Flux contamination
is calculated for all stars in the CTL, and the procedure for TICv8 is
identical to the procedure for TICv7.
See section 3.3.3 of Stassun+ (2018, J/AJ/156/102) for a complete
description of the contamination ratio calculation.
Note (21): This column identifies objects that are included in the TIC, but are
likely spurious, or related to other TIC objects in a non-trivial,
non-astrophysical way. Currently, this column is populated as a NULL,
DUPLICATE (6), ARTIFACT (7), or SPLIT (8). When a single star in a
previous TIC is found to be two or more actual sources due to the
enhanced resolution of Gaia DR-2, the original TICID gets the
disposition SPLIT. New TICIDs are assigned to the objects and the
original TICID is in column "duplicate_id". The original star
"SPLIT" star will have NULL in the dup_id. The DUPLICATE flag means
the star is listed twice (or more) in the TIC due to prior
cross-matching difficulties. In this case, DUP_ID contains the TICID
of the real star.
Note (22): This is a floating-point value ranging from 0 to 1, where 1 is
highest priority. The priority is based on the relative ability of
TESS to detect small planetary transits, and is calculated using the
radius of the star, the contamination ratio, and the total expected
photometric precision. Stars are given a boost factor to their
priority that scales with a probabilistic model of the expected number
of sectors any given star could fall in. Typically, the closer the
star is to the Ecliptic North or South pole, the larger the boost
factor. Stars close to the Galactic Plane (|b|<10 degrees) have been
de-boosted by a factor of 0.1 since we generally have a poor
understanding of their true reddening, unless they are in the
specially curated cool dwarf list (see Muirhead+, 2018, J/AJ/155/180)
or hot subdwarf list.
The formula is defined for CTLv8.01 is: (Ns)0.5/(Rad1.5*sigma)
where Ns is the expected number of TESS sectors to observe the star; Rad
is the radius of the star (column 71), and sigma is the expected
photometric precision of the star based on the TESS magnitude (column
61) using the formulation from Pepper et al. 2018 (in prep). The
priority is normalized by the priority for a star with R = 0.1 solar,
Ns = 12.654 sectors, no contamination and sigma = 61.75 ppm.
Some stars will have distinct priorities:
Stars with log(g) values that are greater than 5 have had their
priorities set to 0 to avoid biases from poor quality effective
temperature, extinction, or parallax measurements. Stars in the
specially curated lists are excluded from this scenario. Stars with
ecliptic latitudes (column 28) less than ∼6 degrees in absolute value
are not expected to be observed as part of the main mission due to a
gap in camera coverage between the Southern and Northern observations.
Therefore, their Ns values are 0 and thus the priority is 0.
Note (23): This E(B-V) flag denotes the source of the adopted extinction
as follows:
0 = A color excess applied of 0 (star is closer than 100pc)
schlegel = Reddening applied from Schlegel dust maps (1998ApJ...500..525S 1998ApJ...500..525S)
panstarrs = Reddening applied from Pan-STARRS dust maps
(Green+ 2018MNRAS.478..651G 2018MNRAS.478..651G)
Note (24): In less than 6200 cases the distance error bars in TICv8 are
different from those published by Bailer-Jones+ (2018, I/347) because
they had been symmetrized in early versions of the code base for TICv8
and were never corrected. These differences are typically minor (<2%,
maximum = 17%), and should have no impact on the derived properties in
TICv8.
Note (25): Boolean flag that denotes the quality of the Gaia parallax and
magnitude information:
-1 = insufficient information
0 = star fails astrometric or photometric quality check
1 = star passes both checks
Note (26): Negative B and V errors come from APASS DR9 (Poissonian error;
unique observation).
--------------------------------------------------------------------------------
History:
Downloaded from: http://archive.stsci.edu/missions/tess/catalogs/tic_v82
(version: 2021-07-19)
(End) G. Monari, F.-X. Pineau, E. Perret [CDS] 14-Feb-2022