IV/36 Gaia-IPHAS/KIS Value-Added Catalogues (Scaringi+, 2018)
The Gaia/IPHAS and Gaia/KIS Value-Added Catalogues.
Scaringi S., Knigge C., Drew J.E., Monguio M., Breedt E., Fratta M.,
Gaensicke B., Maccarone T.J., Pala A.F., Schill C.
<Mon. Not. R. Astron. Soc., 481, 3357-3369 (2018)>
=2018MNRAS.481.3357S 2018MNRAS.481.3357S
=2018yCat.4036....0S 2018yCat.4036....0S
ADC_Keywords: Surveys ; Stars, standard ; Positional data ; Proper motions ;
Photometry, photographic ; Cross identifications ;
Stars, variable; Photometry, H-alpha ; Stars, emission ;
Galactic plane
Keywords: catalogues - surveys - parallaxes - proper motions -
Galaxy: stellar content - stars: emission-line -
Abstract:
We present a sub-arcsecond cross-match of Gaia DR2 (Cat. I/345)
against the INT Photometric H-alpha Survey of the Northern Galactic
Plane Data Release 2 (IPHAS DR2, Cat. II/321) and the Kepler-INT
Survey (KIS, Cat. J/AJ/144/24). The resulting value-added catalogues
(VACs) provide additional precise photometry to the Gaia photometry
(r, i and H-alpha for IPHAS, with additional U and g for KIS). In
building the catalogue, proper motions given in Gaia DR2 are wound
back to match the epochs of IPHAS DR2, thus ensuring high proper
motion objects are appropriately cross-matched. The catalogues contain
7927224 and 791071 sources for IPHAS and KIS, respectively. The
requirement of >5 sigma parallax detection for every included source
means that distances out to 1-1.5kpc are well covered. We define two
additional parameters for each catalogued object: (i) fc, a
magnitude-dependent tracer of the quality of the Gaia astrometric fit;
(ii) fFP, the false-positive rate for parallax measurements
determined from astrometric fits of a given quality at a given
magnitude. Selection cuts based on these parameters can be used to
clean colour-magnitude and colour-colour diagrams in a controlled and
justified manner. We provide both full and light versions of the VAC,
with VAC-light containing only objects that represent our recommended
trade-off between purity and completeness. Uses of the catalogues
include the identification of new variable stars in the matched data
sets, and more complete identification of H-alpha-excess emission
objects thanks to separation of high-luminosity stars from the main
sequence.
Description:
Value-added catalogues for both Gaia/IPHAS and Gaia/KIS. For each we
also provide light catalogue versions containing only targets which
satisfy our reccomended quality control cuts and minimal column
entries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
giphasl.dat 181 7479991 Light version of the Gaia-IPHAS value-added
catalogue
GaiaIPHAS_full.fits 2880 817503 Full version of the Gaia-IPHAS value-added
catalogue
GaiaIPHAS_light.fits 2880 311673 Fits version of giphasl.dat
gkisl.dat 180 773464 Light version of the Gaia-KIS value-added
catalogue
GaiaKIS_full.fits 2880 78568 Full version of the Gaia-KIS value-added
catalogue
GaiaKIS_light.fits 2880 31160 Fits version of gkisl.dat
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Note in *.dat: Light version is restricted to sources satisfying the
recommended quality cuts of fc<0.98 and fFP≤ 0.02.
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/321 : IPHAS DR2 Source Catalogue (Barentsen+, 2014)
J/AJ/144/24 : KIS: The Kepler-INT survey (Greiss+, 2012)
Byte-by-byte Description of file: giphasl.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- GaiaDR2 Unique Gaia DR2 source designation
(Gaia DR2 NNNNNNNNNNNNNNNNNNN) (Cat. I/345)
30- 44 F15.11 deg RAdeg Gaia DR2 barycentric right ascension (ICRS)
at Epoch 2015.5 (Cat. I/345)
46- 60 F15.11 deg DEdeg Gaia DR2 barycentric declination (ICRS)
at Epoch 2015.5 (Cat. I/345)
62- 71 F10.4 mas Plx Absolute stellar parallax (Gaia DR2, I/345)
73- 81 F9.3 mas/yr pmRA Proper motion in right ascension direction
(Gaia DR2, I/345)
83- 91 F9.3 mas/yr pmDE Proper motion in declination direction
(Gaia DR2, I/345)
93-101 F9.6 mag Gmag G-band mean magnitude (Gaia DR2, I/345)
103-111 F9.6 mag BPmag ?=- Integrated BP mean magnitude
(Gaia DR2, I/345)
113-121 F9.6 mag RPmag ?=- Integrated RP mean magnitude
(Gaia DR2, I/345)
123-131 F9.6 mag rmag r-band magnitude (IPHAS DR2, II/321)
133-141 F9.6 mag imag i-band magnitude (IPHAS DR2, II/321)
143-151 F9.6 mag Hamag Hα-band magnitude (IPHAS DR2, II/321)
153-163 F11.5 d mMJD Modified Julian Date used for cross-matching
Gaia to IPHAS
165-172 F8.6 --- fc Retention fraction based on redChi2
(completeness)
174-181 F8.6 --- fFP False-Positive rate based on negative
parallax sample
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Byte-by-byte Description of file: gkisl.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 28 A28 --- GaiaDR2 Unique Gaia DR2 source designation
(Gaia DR2 NNNNNNNNNNNNNNNNNNN) (Cat. I/345)
30- 44 F15.11 deg RAdeg Gaia DR2 barycentric right ascension (ICRS)
at Epoch 2015.5 (Cat. I/345)
46- 60 F15.11 deg DEdeg Gaia DR2 barycentric declination (ICRS)
at Epoch 2015.5 (Cat. I/345)
62- 71 F10.4 mas Plx Absolute stellar parallax (Gaia DR2, I/345)
73- 81 F9.3 mas/yr pmRA Proper motion in right ascension direction
(Gaia DR2, I/345)
83- 91 F9.3 mas/yr pmDE Proper motion in declination direction
(Gaia DR2, I/345)
93- 99 F7.4 mag Gmag G-band mean magnitude (Gaia DR2, I/345)
101-107 F7.4 mag BPmag ?=- Integrated BP mean magnitude
(Gaia DR2, I/345)
109-115 F7.4 mag RPmag ?=- Integrated RP mean magnitude
(Gaia DR2, I/345)
117-122 F6.3 mag Umag U-band magnitude (KIS DR2, J/AJ/144/24)
124-129 F6.3 mag gmag g-band magnitude (KIS DR2, J/AJ/144/24)
131-136 F6.3 mag rmag r-band magnitude (KIS DR2, J/AJ/144/24)
138-143 F6.3 mag imag i-band magnitude (KIS DR2, J/AJ/144/24)
145-150 F6.3 mag Hamag Hα-band magnitude (KIS DR2, J/AJ/144/24)
152-162 F11.5 d mMJD Modified Julian Date used for cross-matching
Gaia to KIS
164-171 F8.6 --- fc Retention fraction based on redChi2
(completeness)
173-180 F8.6 --- fFP False-Positive rate based on negative
parallax sample
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Acknowledgements:
Simone Scaringi, simone.scaringi(at)ttu.edu
(End) Patricia Vannier [CDS] 10-Sep-2018