TYCHO :The Tycho-2 Catalogue is an astrometric reference catalogue containing positions, proper motions and two-colour photometry for the 2.5 million brightest stars in the sky. The catalogue is based on observations made using the Hipparcos satellite TYCHO/TYCHO :TYCHO filtersid:TYCHO/TYCHO.a → GaiaXPy base XML file. You can download here the GaiaXPy base XML file for the full TYCHO/TYCHO filter set. Please, take a look to the GaiaXPy web page and additional documentation for more information. |
| TYCHO/TYCHO.B_MvB | 4194.96 | 4220.39 | 4219.08 | 3543.20 | 5014.00 | 741.39 | 3887.24 | 6.62e-9 | TYCHO | | TYCHO B, revised by Mann & von Braun 2014 | | TYCHO/TYCHO.B_bes | 4196.92 | 4221.09 | 4234.30 | 3520.83 | 5012.50 | 686.37 | 3596.91 | 6.12e-9 | TYCHO | | TYCHO B, Bessell 2000 calibration | | TYCHO/TYCHO.B | 4280.00 | 4280.00 | 4280.00 | 3535.79 | 4973.00 | 708.43 | 3793.83 | 6.51e-9 | TYCHO | | TYCHO B | | TYCHO/TYCHO.V | 5340.00 | 5340.00 | 5340.00 | 4572.64 | 6690.20 | 1005.67 | 3712.19 | 4.0e-9 | TYCHO | | TYCHO V | | TYCHO/TYCHO.V_bes | 5301.29 | 5346.61 | 5260.32 | 4555.36 | 6708.33 | 1063.67 | 3745.01 | 3.99e-9 | TYCHO | | TYCHO V, Bessell 2000 calibration | | TYCHO/TYCHO.V_MvB | 5300.19 | 5352.17 | 5258.48 | 4519.23 | 6769.20 | 1133.55 | 3692.28 | 3.94e-9 | TYCHO | | TYCHO V, revised by Mann & von Braun 2014 |
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 ≡ filter transmission<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl</ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<br> Vg(λ) ≡ Vega spectrum.<p><u>More info:</u><p>Vega spectrum from calspec database.<ul><li><a href="https://ui.adsabs.harvard.edu/abs/2014PASP..126..711B/abstract" target="_blank">Bohlin, Gordon, & Tremblay (2014)</a>.<li><a href="https://www.stsci.edu/hst/instrumentation/reference-data-for-calibration-and-tools/astronomical-catalogs/calspec" target="_blank">STScI current calspec</a>.<li><a href="morefiles/vega.dat" target="_blank">Vega spectrum file</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl.effective</ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p>Equivalent to the horizontal size of a rectangle with height equal to maximum transmission and with the same area that the one covered by the filter transmission curve.<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:instr.bandwidth<li><b>Utype</b>: <i>photdm:PhotometryFilter.bandwidth.extent.value</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission (energy counter).<br> Vg(λ) ≡ Vega spectrum.<p><i>(T(λ) must be multiplied by λ for photon counting devices)</i><p>F<sub>0,ν</sub>(Jy) = (2.9979246)<sup>-1</sup> 10<sup>5</sup> * λ<sub>ref</sub><sup>2</sup> * F<sub>0,λ</sub>(erg/cm<sup>2</sup>/s/A)<p>In the case that filter owner specifies its own values, they will be the ones provided by the service when queried through the VO.<p><u>Property info:</u><ul><li><b>Unit</b>:Jy<li><b>UCD</b>:phot.flux.density<li><b>Utype</b>: <i>photdm:PhotCal.zeroPoint.flux.value</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission (energy counter).<br> Vg(λ) ≡ Vega spectrum.<p><i>(T(λ) must be multiplied by λ for photon counting devices)</i><p><u>Property info:</u><ul><li><b>Unit</b>:erg/cm2/s/A<li><b>Utype</b>: <i>PhotCal.ZeroPoint</i></ul></td></table>',WIDTH,400)){kind=link}
