J/MNRAS/493/2568 Faint Standards for UKIDSS and VISTA ZYJHK (Leggett+, 2020)
Faint Standards for ZYJHK from the UKIDSS and VISTA Surveys.
Leggett S.K., Cross N.J.G., Hambly N.C.
<Mon. Not. R. Astron. Soc., 493, 2568-2595 (2020)>
=2020MNRAS.493.2568L 2020MNRAS.493.2568L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, faint ; Photometry, standards ; Photometry, ugriz ;
Photometry, infrared ; Spectral types ; Positional data ;
Parallaxes, trigonometric ; Proper motions
Keywords: standards - methods: observational - techniques: photometric -
surveys
Abstract:
The currently defined 'United Kingdom Infrared Telescope (UKIRT) Faint
Standards' have JHK magnitudes between 10 and 15, with Kmedian=11.2.
These stars will be too bright for the next generation of large
telescopes. We have used multi-epoch observations taken as part of the
UKIRT Infrared Deep Sky Survey (UKIDSS) and the Visible and Infrared
Survey Telescope for Astronomy (VISTA) surveys to identify
non-variable stars with JHK magnitudes in the range 16-19. The stars
were selected from the UKIDSS Deep Extragalactic Survey and Ultra Deep
Survey, the WFCAM calibration data (WFCAMCAL08B), the VISTA Deep
Extragalactic Observations (VIDEO), and UltraVISTA. Sources selected
from the near-infrared databases were paired with the Pan-STARRS Data
Release 2 of optical to near-infrared photometry and the Gaia
astrometric Data Release 2. Colour indices and other measurements were
used to exclude sources that did not appear to be simple single stars.
From an initial selection of 169 sources, we present a final sample of
81 standard stars with ZYJHK magnitudes, or a subset, each with 20 to
600 observations in each filter. The new standards have
Ksmedian=17.5. The relative photometric uncertainty for the sample
is <0.006mag and the absolute uncertainty is estimated to be
~<0.02mag. The sources are distributed equatorially and are accessible
from both hemispheres.
Description:
The Northern hemisphere UKIDSS (with the WFCAM camera) and the
Southern hemisphere VISTA use similar-size telescopes, and similar
filters defined according to the Mauna Kea Observatories filter
specifications (Tokunaga, Simons & Vacca 2002PASP..114..180T 2002PASP..114..180T). Survey
data generated by both telescopes are initially processed by the
Cambridge Astronomy Survey Unit (CASU) and then transferred to the
Wide-Field Astronomy Unit (WFAU) in Edinburgh for further processing
and archiving (Hambly et al. 2008MNRAS.384..637H 2008MNRAS.384..637H; Cross et al.
2012A&A...548A.119C 2012A&A...548A.119C). Table 1 gives a summary of the properties of the
surveys used in this work.
We used the WFCAM Science Archive (http://wsa.roe.ac.uk) and the VISTA
Science Archive (http://surveys.roe.ac.uk/vsa) to query the DXS, UDS,
UltraVISTA, VIDEO and WFCAMCAL databases.
Our goal is to identify stars that are not variable, that have
well-measured JHK magnitudes, and are fainter than K=16. Therefore we
only used surveys with variability tables for all of the J, H, and K
filters.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 67 5 Overview of the Sky Survey Data
table2.dat 292 81 Data for final sample
table3.dat 152 6 Standard stars from WFCAM: ZY
table4.dat 124 32 Standard stars from VISTA: ZY
table5.dat 215 49 Standard stars from WFCAM: JHK
table6.dat 173 32 Standard stars from VISTA: JHKs
table7.dat 152 81 Standard stars with VISTA-System ZYJHKs
tableb1.dat 290 77 Data for sources identified as possible galaxies
tablec1.dat 179 7 Data for sources identified as likely stars
with atypical colours
tablec2.dat 178 4 Likely stars with deviant mean and aperture
magnitudes
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 45 A45 --- Survey Survey name
47 A1 --- f_Survey [ab] Flag on Survey (1)
49- 52 F4.1 deg2 Area Area of coverage
54- 59 A6 --- Filters Filters available
61- 65 A5 mag Maglim Limiting magnitude (5σ limit)
67 I1 --- ref [1/4] References (2)
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Note (1): Flag as follows:
a = For the UDS, the source table aperture magnitudes are not aperture
corrected and the variability table mean magnitudes are. For a sample of
30 objects, we find an average offset in photometry of 0.190±0.005,
0.202±0.006, and 0.179±0.006, at J, H and K respectively, such that
the mean magnitudes are brighter.
b = For UltraVISTA there are differences in the aperture corrections and
zero-points used for the source table aperture magnitudes and the
variability table mean magnitudes. For a sample of 19 objects we find
meanMag-aperMag3=0.020±0.005, 0.052±0.006, -0.025±0.010, and
-0.004±0.012 at Y, J, H and Ks respectively.
Note (2): References as follows:
1 = Lawrence et al. (2007MNRAS.379.1599L 2007MNRAS.379.1599L, Cat. II/314)
2 = Jarvis et al. (2013MNRAS.428.1281J 2013MNRAS.428.1281J, Cat. III/334)
3 = McCracken et al. (2012A&A...544A.156M 2012A&A...544A.156M, Cat. J/A+A/544/A156)
4 = Ferreira Lopes et al. (2015A&A...573A.100F 2015A&A...573A.100F, Cat. J/A+A/573/A100)
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Survey Survey name
8- 18 F11.7 deg RAdeg Right ascension (J2000)
20- 29 F10.7 deg DEdeg Declination (J2000)
31- 34 A4 --- SpType Spectral type
36- 51 F16.12 deg RA2deg ? Right ascension from Gaia DR2 (ICRS) at
Ep=2015.5
53- 60 F8.5 mas e_RA2deg ? Error on RA2deg
62- 78 F17.14 deg DE2deg ? Declination from Gaia DR2 (ICRS) at
Ep=2015.5
80- 87 F8.5 mas e_DE2deg ? Error on DE2deg
89- 95 F7.4 mas plx ? Parallax from Gaia DR2
97-102 F6.4 mas e_plx ? Error on plx
104-111 F8.4 mas/yr pmRA ? Proper motion in right ascension from
Gaia DR2
113-118 F6.4 mas/yr e_pmRA ? Error on pmRA
120-127 F8.4 mas/yr pmDE ? Proper motion in declination from Gaia
DR2
129-134 F6.4 mas/yr e_pmDE ? Error on pmDE
136-142 F7.4 mag Gmag ? Gaia DR2 G-band magnitude
144-150 F7.4 mag gmag ? Pan-STARRS g-band AB magnitude
152-157 F6.4 mag e_gmag ? Error on gmag
159-165 F7.4 mag rmag ? Pan-STARRS r-band AB magnitude
167-172 F6.4 mag e_rmag ? Error on rmag
174-180 F7.4 mag imag Pan-STARRS i-band AB magnitude
182-187 F6.4 mag e_imag Error on imag
189-195 F7.4 mag zmag Pan-STARRS z-band AB magnitude
197-202 F6.4 mag e_zmag Error on zmag
204-210 F7.4 mag ymag Pan-STARRS y-band AB magnitude
212-217 F6.4 mag e_ymag Error on ymag
219-225 F7.4 mag Zmag ? VISTA Z-band Vega magnitude
227-232 F6.4 mag e_Zmag ? Error on Zmag
234-240 F7.4 mag Ymag ? VISTA Y-band Vega magnitude
242-247 F6.4 mag e_Ymag ? Error on Ymag
249-255 F7.4 mag Jmag VISTA J-band Vega magnitude
257-262 F6.4 mag e_Jmag Error on Jmag
264-270 F7.4 mag Hmag VISTA H-band Vega magnitude
272-277 F6.4 mag e_Hmag Error on Hmag
279-285 F7.4 mag Ksmag VISTA Ks-band Vega magnitude
287-292 F6.4 mag e_Ksmag Error on Ksmag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Survey Survey name
5- 15 F11.7 deg RAdeg Right ascension (J2000)
17- 26 F10.7 deg DEdeg Declination (J2000)
28- 30 I3 --- o_Zmeanmag Number of observations used to determine
Zmeanmag
32- 38 F7.4 mag Zmeanmag Mean Z-band magnitude
40- 45 F6.4 mag e_Zmeanmag Error on Zmeanmag
47- 53 F7.4 mag ZAper Z-band aperture magnitude
55- 60 F6.4 mag e_ZAper Error on ZAper
62- 67 F6.4 mag Zrms Root-mean-square value of the multiple Z-band
magnitude measurements
69- 74 F6.4 mag ZMAD Median absolute deviation of Zmeanmag
76- 78 I3 --- o_Ymeanmag Number of observations used to determine
Ymeanmag
80- 86 F7.4 mag Ymeanmag Mean Y-band magnitude
88- 93 F6.4 mag e_Ymeanmag Error on Ymeanmag
95-101 F7.4 mag YAper Y-band aperture magnitude
103-108 F6.4 mag e_YAper Error on YAper
110-115 F6.4 mag Yrms Root-mean-square value of the multiple Y-band
magnitude measurements
117-122 F6.4 mag YMAD Median absolute deviation of Ymeanmag
124-130 F7.4 mag Zmag Z-band VISTA magnitude
132-137 F6.4 mag e_Zmag Error on Zmag
139-145 F7.4 mag Ymag Y-band VISTA magnitude
147-152 F6.4 mag e_Ymag Error on Ymag
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Survey Survey name
8- 18 F11.7 deg RAdeg Right ascension (J2000)
20- 29 F10.7 deg DEdeg Declination (J2000)
31- 32 I2 --- o_Zmeanmag ? Number of observations used to determine
Zmeanmag
34- 40 F7.4 mag Zmeanmag ? Mean Z-band magnitude
42- 47 F6.4 mag e_Zmeanmag ? Error on Zmeanmag
49- 55 F7.4 mag ZAper ? Z-band aperture magnitude
57- 62 F6.4 mag e_ZAper ? Error on ZAper
64- 69 F6.4 mag Zrms ? Root-mean-square value of the multiple
Z-band magnitude measurements
71- 76 F6.4 mag ZMAD ? Median absolute deviation of Zmeanmag
78- 80 I3 --- o_Ymeanmag Number of observations used to determine
Ymeanmag
82- 88 F7.4 mag Ymeanmag Mean Y-band magnitude
90- 95 F6.4 mag e_Ymeanmag Error on Ymeanmag
97-103 F7.4 mag YAper Y-band aperture magnitude (1)
105-110 F6.4 mag e_YAper Error on YAper
112-117 F6.4 mag Yrms Root-mean-square value of the multiple Y-band
magnitude measurements
119-124 F6.4 mag YMAD Median absolute deviation of Ymeanmag
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Note (1): UltraVISTA Y-band source table aperture magnitudes are systematically
brighter than the variability table mean magnitudes by ∼0.02mag, due
to differences in the aperture correction and zero-points. All mean
magnitudes given in this paper are self-consistent
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Survey Survey name
5- 15 F11.7 deg RAdeg Right ascension (J2000)
17- 26 F10.7 deg DEdeg Declination (J2000)
28- 30 I3 --- o_Jmeanmag Number of observations used to determine
Jmeanmag
32- 38 F7.4 mag Jmeanmag Mean J-band magnitude
40- 45 F6.4 mag e_Jmeanmag Error on Jmeanmag
47- 53 F7.4 mag JAper J-band aperture magnitude (1)
55- 60 F6.4 mag e_JAper Error on JAper
62- 67 F6.4 mag Jrms Root-mean-square value of the multiple J-band
magnitude measurements
69- 74 F6.4 mag JMAD Median absolute deviation of Jmeanmag
76- 78 I3 --- o_Hmeanmag ? Number of observations used to determine
Hmeanmag
80- 86 F7.4 mag Hmeanmag ? Mean H-band magnitude
88- 93 F6.4 mag e_Hmeanmag ? Error on Hmeanmag
95-101 F7.4 mag HAper ? H-band aperture magnitude (1)
103-108 F6.4 mag e_HAper ? Error on HAper
110-115 F6.4 mag Hrms ? Root-mean-square value of the multiple
H-band magnitude measurements
117-122 F6.4 mag HMAD ? Median absolute deviation of Hmeanmag
124-126 I3 --- o_Kmeanmag Number of observations used to determine
Kmeanmag
128-134 F7.4 mag Kmeanmag Mean K-band magnitude
136-141 F6.4 mag e_Kmeanmag Error on Kmeanmag
143-149 F7.4 mag KAper K-band aperture magnitude (1)
151-156 F6.4 mag e_KAper Error on KAper
158-163 F6.4 mag Krms Root-mean-square value of the multiple K-band
magnitude measurements
165-170 F6.4 mag KMAD Median absolute deviation of Kmeanmag
172-178 F7.4 mag Jmag J-band VISTA magnitude
180-185 F6.4 mag e_Jmag Error on Jmag
187-193 F7.4 mag Hmag H-band VISTA magnitude
195-200 F6.4 mag e_Hmag Error on Hmag
202-208 F7.4 mag Ksmag Ks-band VISTA magnitude
210-215 F6.4 mag e_Ksmag Error on Ksmag
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Note (1): UDS aperture magnitudes are not aperture corrected and are
systematically fainter than the mean magnitudes by ∼0.2mag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Survey Survey name
8- 18 F11.7 deg RAdeg Right ascension (J2000)
20- 29 F10.7 deg DEdeg Declination (J2000)
31- 33 I3 --- o_Jmeanmag Number of observations used to determine
Jmeanmag
35- 41 F7.4 mag Jmeanmag Mean J-band magnitude
43- 48 F6.4 mag e_Jmeanmag Error on Jmeanmag
50- 56 F7.4 mag JAper J-band aperture magnitude (1)
58- 63 F6.4 mag e_JAper Error on JAper
65- 70 F6.4 mag Jrms Root-mean-square value of the multiple J-band
magnitude measurements
72- 77 F6.4 mag JMAD Median absolute deviation of Jmeanmag
79- 81 I3 --- o_Hmeanmag Number of observations used to determine
Hmeanmag
83- 89 F7.4 mag Hmeanmag Mean H-band magnitude
91- 96 F6.4 mag e_Hmeanmag Error on Hmeanmag
98-104 F7.4 mag HAper H-band aperture magnitude (1)
106-111 F6.4 mag e_HAper Error on HAper
113-118 F6.4 mag Hrms Root-mean-square value of the multiple H-band
magnitude measurements
120-125 F6.4 mag HMAD Median absolute deviation of Hmeanmag
127-129 I3 --- o_Kmeanmag Number of observations used to determine
Kmeanmag
131-137 F7.4 mag Kmeanmag Mean K-band magnitude
139-144 F6.4 mag e_Kmeanmag Error on Kmeanmag
146-152 F7.4 mag KAper K-band aperture magnitude
154-159 F6.4 mag e_KAper Error on KAper
161-166 F6.4 mag Krms Root-mean-square value of the multiple K-band
magnitude measurements
168-173 F6.4 mag KMAD Median absolute deviation of Kmeanmag
--------------------------------------------------------------------------------
Note (1): UltraVISTA source table aperture magnitudes are systematically
brighter than the variability table mean magnitudes by ∼0.05mag at J,
and fainter by ∼0.02mag at H, due to differences in the aperture
correction and zero-points. All mean magnitudes given in this paper
are self-consistent.
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Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- ID [1/81] Internal object identifier
4- 34 A31 --- Name Star name (IAU designation)
36- 46 F11.7 deg RAdeg Right ascension (J2000)
48- 57 F10.7 deg DEdeg Declination (J2000)
59- 61 I3 --- o_Zmag ? Number of observations used to determine
Zmag
63- 69 F7.4 mag Zmag ? Z-band magnitude
71- 76 F6.4 mag e_Zmag ? Error on Zmag
78- 80 I3 --- o_Ymag ? Number of observations used to determine
Ymag
82- 88 F7.4 mag Ymag ? Y-band magnitude
90- 95 F6.4 mag e_Ymag ? Error on Ymag
97- 99 I3 --- o_Jmag Number of observations used to determine
Jmag
101-107 F7.4 mag Jmag J-band magnitude
109-114 F6.4 mag e_Jmag Error on Jmag
116-118 I3 --- o_Hmag ? Number of observations used to determine
Hmag
120-126 F7.4 mag Hmag ? H-band magnitude
128-133 F6.4 mag e_Hmag ? Error on Hmag
135-137 I3 --- o_Ksmag Number of observations used to determine
Ksmag
139-145 F7.4 mag Ksmag Ks-band magnitude
147-152 F6.4 mag e_Ksmag Error on Ksmag
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Survey Survey name
8- 18 F11.7 deg RAdeg Right ascension (J2000)
20- 30 F11.7 deg DEdeg Declination (J2000)
32- 34 A3 --- flag Flag (1)
36- 51 F16.12 deg RA2deg ? Right ascension from Gaia DR2 (ICRS) at
Ep=2015.5
53- 59 F7.5 mas e_RA2deg ? Error on RA2deg
61- 76 F16.12 deg DE2deg ? Declination from Gaia DR2 (ICRS) at
Ep=2015.5
78- 85 F8.5 mas e_DE2deg ? Error on DE2deg
87- 93 F7.4 mas plx ? Parallax from Gaia DR2
95-100 F6.4 mas e_plx ? Error on plx
102-109 F8.4 mas/yr pmRA ? Proper motion in right ascension from
Gaia DR2
111-116 F6.4 mas/yr e_pmRA ? Error on pmRA
118-125 F8.4 mas/yr pmDE ? Proper motion in declination from Gaia DR2
127-132 F6.4 mas/yr e_pmDE ? Error on pmDE
134-140 F7.4 mag Gmag ? Gaia DR2 G-band magnitude
142-148 F7.4 mag gmag ? Pan-STARRS g-band AB magnitude
150-155 F6.4 mag e_gmag ? Error on gmag
157-163 F7.4 mag rmag ? Pan-STARRS r-band AB magnitude
165-170 F6.4 mag e_rmag ? Error on rmag
172-178 F7.4 mag imag Pan-STARRS i-band AB magnitude
180-185 F6.4 mag e_imag Error on imag
187-193 F7.4 mag zmag Pan-STARRS z-band AB magnitude
195-200 F6.4 mag e_zmag Error on zmag
202-208 F7.4 mag ymag Pan-STARRS y-band AB magnitude
210-215 F6.4 mag e_ymag Error on ymag
217-223 F7.4 mag Zmag ? VISTA Z-band Vega magnitude
225-230 F6.4 mag e_Zmag ? Error on Zmag
232-238 F7.4 mag Ymag ? VISTA Y-band Vega magnitude
240-245 F6.4 mag e_Ymag ? Error on Ymag
247-253 F7.4 mag Jmag VISTA J-band Vega magnitude
255-260 F6.4 mag e_Jmag Error on Jmag
262-268 F7.4 mag Hmag VISTA H-band Vega magnitude
270-275 F6.4 mag e_Hmag Error on Hmag
277-283 F7.4 mag Ksmag VISTA Ks-band Vega magnitude
285-290 F6.4 mag e_Ksmag Error on Ksmag
--------------------------------------------------------------------------------
Note (1): Flag as follows:
1 = HKyJ and/or HKYJ colour
2 = one or more Pan-STARRS filters have Kron magnitudes brighter than the
PSF magnitude by 0.05mag
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Byte-by-byte Description of file: tablec1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Survey Survey name
7- 17 F11.7 deg RAdeg Right ascension (J2000)
19- 29 F11.7 deg DEdeg Declination (J2000)
31- 37 F7.4 mag gmag ? Pan-STARRS g-band AB magnitude
39- 44 F6.4 mag e_gmag ? Error on gmag
46- 52 F7.4 mag rmag ? Pan-STARRS r-band AB magnitude
54- 59 F6.4 mag e_rmag ? Error on rmag
61- 67 F7.4 mag imag ? Pan-STARRS i-band AB magnitude
69- 74 F6.4 mag e_imag ? Error on imag
76- 82 F7.4 mag zmag Pan-STARRS z-band AB magnitude
84- 89 F6.4 mag e_zmag Error on zmag
91- 97 F7.4 mag ymag Explain cols
99-104 F6.4 mag e_ymag Pan-STARRS y-band AB magnitude
106-112 F7.4 mag Zmag ? VISTA Z-band Vega magnitude
114-119 F6.4 mag e_Zmag ? Error on Zmag
121-127 F7.4 mag Ymag ? VISTA Y-band Vega magnitude
129-134 F6.4 mag e_Ymag ? Error on Ymag
136-142 F7.4 mag Jmag VISTA J-band Vega magnitude
144-149 F6.4 mag e_Jmag Error on Jmag
151-157 F7.4 mag Hmag VISTA H-band Vega magnitude
159-164 F6.4 mag e_Hmag Error on Hmag
166-172 F7.4 mag Ksmag VISTA Ks-band Vega magnitude
174-179 F6.4 mag e_Ksmag Error on Ksmag
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Byte-by-byte Description of file: tablec2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Survey Survey name
7- 17 F11.7 deg RAdeg Right ascension (J2000)
19- 28 F10.7 deg DEdeg Declination (J2000)
30- 36 F7.4 mag Zmeanmag ? Mean Z-band magnitude
38- 43 F6.4 mag e_Zmeanmag ? Error on Zmeanmag
45- 51 F7.4 mag ZAper ? Z-band aperture magnitude
53- 58 F6.4 mag e_ZAper ? Error on ZAper
60- 66 F7.4 mag Ymeanmag Mean Y-band magnitude
68- 73 F6.4 mag e_Ymeanmag Error on Ymeanmag
75- 81 F7.4 mag YAper Y-band aperture magnitude
83- 88 F6.4 mag e_YAper Error on YAper
90- 96 F7.4 mag Jmeanmag Mean J-band magnitude
98-103 F6.4 mag e_Jmeanmag Error on Jmeanmag
105-111 F7.4 mag JAper J-band aperture magnitude
113-118 F6.4 mag e_JAper Error on JAper
120-126 F7.4 mag Hmeanmag Mean H-band magnitude
128-133 F6.4 mag e_Hmeanmag Error on Hmeanmag
135-141 F7.4 mag HAper H-band aperture magnitude
143-148 F6.4 mag e_HAper Error on HAper
150-156 F7.4 mag Kmeanmag Mean K-band magnitude
158-163 F6.4 mag e_Kmeanmag Error on Kmeanmag
165-171 F7.4 mag KAper K-band aperture magnitude
173-178 F6.4 mag e_KAper Error on KAper
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History:
From electronic version of the journal
(End) Ana Fiallos [CDS] 14-Apr-2023