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_bes | Filter Description | Filter ID (?) : | TYCHO/TYCHO.B_bes |
| Description (?) : | TYCHO B, Bessell 2000 calibration |
| Phot.System (?) : | TYCHO |
| Detector Type (?) : | Energy counter |
| Band Name (?) : | B |
| Obs. Facility (?) : | TYCHO |
| Instrument (?) : | ------ |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
4196.92 | ------- | (Angstrom) |
| λmean (?) : |
4221.09 | ------- | (Angstrom) |
| λcen (?) : |
4211.00 | ------- | (Angstrom) |
| λeff (?) : |
4234.30 | ------- | (Angstrom) |
| λpeak (?) : |
4350.00 | ------- | (Angstrom) |
| λpivot (?) : |
4196.92 | ------- | (Angstrom) |
| λphot (?) : |
4248.22 | ------- | (Angstrom) |
| λmin (?) : |
3520.83 | ------- | (Angstrom) |
| λmax (?) : |
5012.50 | ------- | (Angstrom) |
| Weff (?) : |
686.37 | ------- | (Angstrom) |
| FWHM (?) : |
688.99 | ------- | (Angstrom) |
| Af/AV (?) : |
1.37 | ------- | () |
| Fsun (?) : |
165.91 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
Bessell 2000 Transmission components: Filter + Instrumentid:TYCHO/TYCHO.B_bes
You can download here the GaiaXPy base XML file for the full TYCHO/TYCHO filter set.
Please, take a look to GaiaXPy documentation for more information. - GaiaXPy base XML file. | | Calibration properties
Vega System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
6.12194e-9 | (erg/cm2/s/A) |
| |
------- |
3596.91 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
TYCHO/TYCHO.B_bes/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
6.17997e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
TYCHO/TYCHO.B_bes/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
2133.37 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
TYCHO/TYCHO.B_bes/ST |
| |
|
Filter added: 2014-11-21 05:15:20
Last update: 2021-07-27 20:43:09 | | 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 |
| Filter Plots
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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}
 ≡ filter transmission<p>f(λ) ≡ flux of the spectrum<p><u>Property info:</u><ul><li><b>UCD</b>:meta.code<li><b>Utype</b>: <i>photdm:PhotometricSystem.detectorType</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p><img src=showgraph.php?what=lmean&val=4221.0890616565&id=TYCHO/TYCHO.B_bes><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission<br> Vg(λ) ≡ Vega spectrum.<p><img src=showgraph.php?what=leff&val=4234.2951392718&id=TYCHO/TYCHO.B_bes><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>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission<p><img src=showgraph.php?what=lpiv&val=4196.9165987844&id=TYCHO/TYCHO.B_bes><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission<br> Vg(λ) ≡ Vega spectrum<p><img src=showgraph.php?what=lphot&val=4248.2160067311&id=TYCHO/TYCHO.B_bes><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</ul></td></table>',STICKY,true,CLOSEBTN,true,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><img src=showgraph.php?what=weff&val=686.37495860783,4211.0004164606,1&id=TYCHO/TYCHO.B_bes><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>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
![(?)](javascript:Tip('<b>A<sub>f</sub>/A<sub>V</sub></b><br><table cellpadding=20><td class=helptd>Ratio between extintion at λ<sub>ref</sub> and visual extintion. <p>Calculated by the service using the extinction law by <a href="http://adsabs.harvard.edu/abs/1999PASP..111...63F" target="_blank">Fitzpatrick (1999)</a> improved by <a href="http://adsabs.harvard.edu/abs/2005ApJ...619..931I" target="_blank">Indebetouw et al (2005)</a> in the infrared. <p><img src="images/extlaw.png"><p>You can download the corresponding <a href=\"getextlaw.php\" target=\"_blank\">data file</a> for the opacity k<sub>λ</sub>. The extinction at each wavelength is calculated as: A<sub>λ</sub> = A<sub>V</sub> * k<sub>λ</sub>/k<sub>V</sub>, where k<sub>λ</sub> is the opacity for a given λ and k<sub>V</sub>=211.4<p><p><u>Property info:</u><ul></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission.<br> Sun(λ) ≡ Sun spectrum.<p><img src="images/sun.png"><p><p><u>More info:</u><p>Sun spectrum from calspec database: sun_reference_stis_002 composed with sun_mod_001 for larger wavelengths.<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/sun.dat" target="_blank">Sun composed spectrum</a> (units: Angstrom erg/cm2/s/A).</ul><p><u>Property info:</u><ul><li><b>Unit</b>:erg/cm2/s/A<li><b>UCD</b>:phot.flux.density</ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission.<br> Vg(λ) ≡ Vega spectrum.<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>VO PhotDM Utypes</u>: <br><i>PhotCal.MagnitudeSystem.type</i> -> VEGAmag <br><i>PhotCal.ZeroPoint.Flux.value</i> -> F<sub>0</sub><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>UCD</b>:phot.flux.density<li><b>Utype</b>: <i>photdm:PhotCal.ZeroPoint.Flux.value</i></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
