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Pointing parameters Using Epoch 2000, decimal numbers: Galactic coordinates centered on l = deg, b = deg Equatorial coordinates centered on α = h, δ = deg Total field area = deg² (max=10 deg²)Photometric system Bolometric corrections are computed as in Girardi et al. 2002. Available systems:
2MASS + Spitzer (IRAC+MIPS)
2MASS + Spitzer (IRAC+MIPS) + WISE
2MASS JHKs
OGLE + 2MASS + Spitzer (IRAC+MIPS)
UBVRIJHK (cf. Maiz-Apellaniz 2006 + Bessell 1990)
UBVRIJHKLMN (cf. Bessell 1990 + Bessell & Brett 1988)
AKARI
BATC
CFHT Megacam + Wircam (all ABmags)
CFHT Wircam
CFHT/Megacam post-2014 u*g'r'i'z'
CFHT/Megacam pre-2014 u*g'r'i'z'
CIBER
CLUE + GALEX (Vegamags)
CSST (ABmags)
DECAM (ABmags)
DENIS
DMC 14 filters
DMC 15 filters
ESO/EIS (WFI UBVRIZ + SOFI JHK)
ESO/WFI
ESO/WFI2
Euclid VIS+NISP (ABmags)
GALEX FUV+NUV (Vegamag) + SDSS ugriz (ABmags)
GALEX FUV+NUV + Johnson's UBV (Maiz-Apellaniz version), all Vegamags
Gaia DR1 + Tycho2 + 2MASS (all Vegamags)
Gaia DR2 + Tycho2 + 2MASS (all Vegamags, Gaia passbands from Evans et al. 2018)
Gaia DR2 + Tycho2 + 2MASS (all Vegamags, Gaia passbands from Weiler 2018)
Gaia EDR3 (all Vegamags, Gaia passbands from ESA/Gaia website)
Gaia's DR1 G, G_BP and G_RP (Vegamags)
Gaia's DR2 G, G_BP and G_RP (Vegamags, Gaia passbands from Evans et al. 2018)
Gaia's DR2 G, G_BP and G_RP (Vegamags, Gaia passbands from Maiz-Apellaniz and Weiler 2018)
Gaia's DR2 G, G_BP and G_RP (Vegamags, Gaia passbands from Weiler 2018)
HST+GALEX+Swift/UVOT UV filters
HST/ACS HRC
HST/ACS WFC (c.f. 2007 revision, pos-04jul06)
HST/ACS WFC - updated filters and zeropoints, 2021
HST/NICMOS AB
HST/NICMOS Vega
HST/STIS imaging mode, Vegamag
HST/WFC3 all W+LP+X filters (UVIS1+IR, final throughputs)
HST/WFC3 long-pass and extremely wide filters (UVIS) - updated filters and zeropoints, 2021
HST/WFC3 medium filters (UVIS+IR) - updated filters and zeropoints, 2021
HST/WFC3 wide filters (UVIS+IR) - updated filters and zeropoints, 2021
HST/WFPC2 (Vegamag, cf. Holtzman et al. 1995)
Hipparcos+Tycho+Gaia DR1 (Vegamags)
INT/WFC (Vegamag)
IPHAS
JWST MIRI wide filters, Vegamags
JWST NIRCam wide+verywide filters, Vegamags
JWST NIRCam wide+verywide+medium filters (Nov 2022), Vegamags
JWST NIRCam wide+verywide+medium filters, Vegamags
JWST Nirspec filters, Vegamags
Kepler + SDSS griz + DDO51 (in ABmags)
Kepler + SDSS griz + DDO51 (in ABmags) + 2MASS (~Vegamag)
KiDS/VIKING (VST/OMEGAM + VISTA/VIRCAM, all ABmags)
LBT/LBC (Vegamag)
LSST (ABmags) + WFIRST proposed filters (Vegamags)
LSST ugrizY, March 2012 total filter throughputs (all ABmags)
LSST ugrizy, Oct 2017 total filter throughputs for DP0 (all ABmags)
LSST ugrizy, Sept 2023, total filter throughputs R1.9 (all ABmags)
NOAO/CTIO/MOSAIC2 (Vegamag)
OGLE-II
Pan-STARRS1
Roman (ex-WFIRST), Vegamags
S-PLUS (Vegamags), revised on Nov. 2017
SDSS ugriz
SDSS ugriz + 2MASS JHKs
SDSS ugriz + UKIDSS ZYJHK
SWIFT/UVOT UVW2, UVM2, UVW1,u (Vegamag)
SkyMapper (ABmags)
Spitzer IRAC+MIPS
Stroemgren-Crawford
Subaru/Hyper Suprime-Cam (ABmags)
Subaru/Suprime-Cam (ABmags)
SuperBIT, all ABmags
TESS + 2MASS (Vegamags)
TESS + 2MASS (Vegamags) + Kepler + SDSS griz + DDO51 (in ABmags)
UKIDSS ZYJHK (Vegamag)
UVIT (all ABmags)
VISIR
VISTA ZYJHKs (Vegamag)
VPHAS+ (ABmags)
VST/OMEGACAM (ABmag)
Vilnius
WFC3/UVIS around CaHK
WFIRST proposed filters, Vegamags
Washington CMT1T2 + DDO51
ZTF (ABmags)
deltaa (Paunzen) + UBV (Maiz-Apellaniz), in Vegamags
Limiting magnitude in ^{th} filter is set to mag (max=32 mag) Distance modulus resolution of Galaxy components is mag (min=0.05 mag)IMF and binaries IMF for single stars:
Salpeter with cutoff at 0.01 M☉
Chabrier exponential
Chabrier lognormal (see paper)
Chabrier lognormal + Salpeter for M>1M☉
Kroupa (corrected for binaries)
Kroupa (non corrected for binaries)
Turn binaries on off Binary fraction = with mass ratios between and

Print binary components as a single entry separately

Extinction No dust extinction or Exponential disk exp(-|z |/h_{z} _{,dust} )×exp(-R /h_{R} _{,dust} ) with scale heigth h_{z} _{,dust} = pc and scale length h_{R} _{,dust} = pc Local calibration: dA_{V} /dr (☉)= mag/pc Calibration at infinity: A_{V} (∞)= mag

1σ dispersion= times the total extinction (max=0.3)

Solar position Sun's Galactocentric radius R ☉= pc, height above disk z ☉= pc Thin disc No thin disc or Along z: Exponential: exp(-|z |/h_{z} _{,d} ) Squared hyperbolic secant: sech²(0.5z /h_{z} _{,d} ) with scale height h_{z} _{,d} increasing with age t cf. h_{z} _{,d} =z _{0} (1+t/t _{0} )^{α} z _{0} = pc, t _{0} = yr, α= .

Along R : Exponential disc: exp(-R /h_{R} _{,d} ) with scale length h_{R} _{,d} = pc, and inner/outer cutoffs at R = pc and pc.

Local calibration: Σ_{d} (☉)= M☉/pc²

SFR and AMR given by
const. SFR + Fuhrman's AMR + α-enh.
2-step SFR + Fuhrman's AMR + α-enh. (see paper)
with age(yr)= ×t + .

Thick disc No thick disc or Along z: Exponential: exp(-|z |/h_{z} _{,td} ) Squared hyperbolic secant: sech²(0.5z /h_{z} _{,td} ) with scale height h_{z} _{,td} = pc

Along R : Exponential disc: exp(-R /h_{R} _{,td} ) with scale length h_{R} _{,td} = pc, and inner/outer cutoffs at R = pc and pc.

Local calibration: Ω_{td} (☉)= M☉/pc³

SFR and AMR given by
11-12 Gyr const. SFR + Z=0.008 with σ[M/H]=0.1 dex
with age(yr)= ×t + .

Halo No halo or r ¼ Spheroid Oblate r ¼ Spheroid Effective radius r _{h} = pc (at major axis), oblateness q _{h} =

Local calibration: Ω_{h} (☉)= M☉/pc³

SFR and AMR given by
12-13 Gyr + Ryan & Norris [M/H] distribution
12-13 Gyr + Z=0.0095 with σ[M/H]=1.0 dex
with age(yr)= ×t + .

Bulge See Vanhollebeke et al. (2009) for details. No bulge or Triaxial bulge Scale length a_{m} = pc, truncation scale length a _{0} = pc, y/x axial ratio η= z/x axial ratio ξ= Sun-GC-bar angle φ_{0} = °Central calibration: Ω_{b} (GC)= M☉/pc³

SFR and AMR given by
10 Gyr, Zoccali et al. 2003 [M/H]
10 Gyr, Zoccali et al.2003 [M/H] + 0.3 dex
with age(yr)= ×t + .

Additional object The addition of star clusters and galaxies is being planned. It requires a major upgrade of the web forms.

This service is mantained by Léo Girardi at the Osservatorio Astronomico di Padova . Questions, comments and special requests should be directed to leo.girardi@oapd·inaf·it . Last modified: Thu Jan 30 15:24:21 2020