J/MNRAS/503/3660 Gaia Spectrophotometric Standard Stars. V. (Pancino+, 2021)
The Gaia spectrophotometric standard stars survey.
V. Preliminary flux tables for the calibration of Gaia DR2 and (E)DR3.
Pancino E., Sanna N., Altavilla G., Marinoni S., Rainer M., Cocozza G.,
Ragaini S., Galleti S., Bellazzini M., Bragaglia A., Tessicini G., Voss H.,
Carrasco J.M., Jordi C., Harrison D.L., De Angeli F., Evans D.W., Fanari G.
<Mon. Not. R. Astron. Soc., 503, 3660-3676 (2021)>
=2021MNRAS.503.3660P 2021MNRAS.503.3660P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, standard ; Stars, variable ; Photometry ; Optical
Keywords: techniques: spectroscopic - catalogues - surveys - stars: general
Abstract:
We present the flux tables of the spectrophotometric standard stars
(SPSS) used to calibrate in flux the Gaia DR2 and (E)DR3 data
releases. The latest SPSS grid version contains 112 stars, whose flux
tables agree to better than 1 per cent with the CALSPEC spectra of 11
flux standards for the calibration of the Hubble Space Telescope. The
synthetic magnitudes computed on the SPSS spectra also agree to better
than 1 per cent with the Landolt magnitudes of 37 stars in common. The
typical spreads in both comparisons are of the order of 1 per cent.
These uncertainties already meet the initial requirements for the Gaia
SPSS project, but further improvements are expected in the next SPSS
versions, that will be used to calibrate future Gaia releases. We
complement the SPSS flux tables with literature spectra of 60
additional stars that did not pass all the criteria to be SPSS, the
Passband Validation Library (PVL). The PVL contains stars of extreme
spectral types, such as bright O and B stars and late M stars and
brown dwarfs, and was useful to investigate systematic effects in the
previous Gaia DR2 release and to minimize them in the EDR3 one. The
PVL literature spectra are recalibrated as accurately as possible on
to the SPSS reference scale, so that the two sets together can be used
in a variety of validation and comparison studies.
Description:
We presented the flux tables for the first two preliminary releases of
the Gaia SPSS: the V1, used to calibrate Gaia DR2 and the V2, used to
calibrate Gaia (E)DR3. We complemented the SPSS grid with the PVL, a
library of stars that do not pass all of our criteria to be flux
standards, but which possess well calibrated spectra in the
literature. Most importantly, the PVL contains very red and bright
blue stars that are normally not used in great quantities as flux
calibrators. The SPSS+PVL combined set was used as a validation
set during the processing of Gaia (E)DR3 photometry.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 163 119 List of SPSS in the V1 and V2 releases
table4.dat 137 101 Parameters of the SPSS best-fitting models
table6.dat 139 112 Synthetic photometry from the SPSS V2 spectra
table7.dat 154 61 The passband validation library (PVL)
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See also:
J/MNRAS/426/1767 : SPSS I. (Pancino+, 2012)
J/MNRAS/462/3616 : SPSS III. (Marinoni+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SPSS [1/352] SPSS identifier
5- 26 A22 --- Name SPSS adopted name
28- 46 I19 --- GaiaEDR3 Gaia EDR3 source identifier
48- 65 F18.14 deg RAdeg Gaia EDR3 right ascension (ICRS) at Ep=2016.0
67- 85 F19.15 deg DEdeg Gaia EDR3 declination (ICRS) at Ep=2016.0
87- 92 F6.3 mag Bmag ? Johnson B magnitude from the literature
94- 99 F6.3 mag Vmag ? Johnson V magnitude from the literature
101-110 A10 --- SpType Spectral type from the literature
112-114 A3 --- inV1 [yes no] The SPSS is included in the V1 release
116-118 A3 --- inV2 [yes no] The SPSS is included in the V2 release
120-121 I2 --- Flag [0/2]?=-1 0=good, 1=minor defects, 2=warning
123-163 A41 --- Notes Any additional notes
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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- 3 I3 --- SPSS [5/352] SPSS identifier
5- 44 A40 --- Name SPSS adopted name
46- 55 A10 --- SpType Spectral type from the literature
57- 61 I5 K Teff ? Effective temperature of best-fitting model
63- 67 F5.3 [cm/s2] logg ? Surface gravity of best-fitting model
69- 74 F6.3 [-] [Fe/H] ? Iron metallicity of best-fitting model
76- 80 F5.3 mag Av ? V-band extinction of best-fitting model
82-100 A19 --- Ref Source of the model
102-137 A36 --- Notes Any additional notes
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SPSS [1/352] SPSS identifier
5- 12 F8.5 mag Usyn U-band synthetic magnitude
14- 20 F7.5 mag e_Usyn Error on U-band synthetic magnitude
22- 29 F8.5 mag Bsyn B-band synthetic magnitude
31- 37 F7.5 mag e_Bsyn Error on B-band synthetic magnitude
39- 46 F8.5 mag Vsyn V-band synthetic magnitude
48- 54 F7.5 mag e_Vsyn Error on V-band synthetic magnitude
56- 63 F8.5 mag Rsyn R-band synthetic magnitude
65- 71 F7.5 mag e_Rsyn Error on R-band synthetic magnitude
73- 80 F8.5 mag Isyn I-band synthetic magnitude
82- 88 F7.5 mag e_Isyn Error on I-band synthetic magnitude
90- 97 F8.5 mag Gsyn G-band synthetic magnitude
99-105 F7.5 mag e_Gsyn Error on G-band synthetic magnitude
107-114 F8.5 mag BPsyn BP-band synthetic magnitude
116-122 F7.5 mag e_BPsyn Error on BP-band synthetic magnitude
124-131 F8.5 mag RPsyn RP-band synthetic magnitude
133-139 F7.5 mag e_RPsyn Error on RP-band synthetic magnitude
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- PVL [401/617] PVL identifier
5- 20 A16 --- Name Adopted star name
22- 40 I19 --- GaiaEDR3 Gaia EDR3 identifier
42- 59 F18.14 deg RAdeg Gaia EDR3 right ascension (ICRS) at Ep=2016.0
61- 81 F21.17 deg DEdeg Gaia EDR3 declination (ICRS) at Ep=2016.0
83- 88 F6.3 mag Bmag ? Johnson B magnitude from literature
90- 95 F6.3 mag Vmag ? Johnson V magnitude from literature
97-104 A8 --- SpType Spectral type from the literature
106-117 A12 --- Ref Source of the used spectra (1)
119-154 A36 --- Notes Any additional notes
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Note (1): Source of the used spectra as follows:
CALSPEC = CALSPEC reference system (Bohlin, 2014AJ....147..127B 2014AJ....147..127B;
Bohlin, Deustua & de Rosa, 2019AJ....158..211B 2019AJ....158..211B)
HOTSTAR NGSL = hot star extension of the NGSL (New Generation Spectral
Library; Koleva & Vazdekis, 2012A&A...538A.143K 2012A&A...538A.143K,
Cat. J/A+A/538/A143)
Ribas+2017 = Ribas et al., 2017A&A...603A..58R 2017A&A...603A..58R, Cat. J/A+A/603/A58
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Acknowledgements:
Elena Pancino, elena.pancino(at)inaf.it
References:
Pancino et al., Paper I 2012MNRAS.426.1767P 2012MNRAS.426.1767P, Cat. J/MNRAS/426/1767
Altavilla et al., Paper II 2015AN....336..515A 2015AN....336..515A
Marinoni et al., Paper III 2016MNRAS.462.3616M 2016MNRAS.462.3616M, Cat. J/MNRAS/462/3616
Altavilla et al., Paper IV 2021MNRAS.501.2848A 2021MNRAS.501.2848A
(End) Patricia Vannier [CDS] 19-Jul-2022