| Generic/Johnson_UBVRIJHKL.U | 3511.89 | 3531.05 | 3551.05 | 3010.00 | 4100.00 | 657.00 | 1438.73 | 3.5e-9 | | | Johnson UBVRIJHKL system, U filter |
| Generic/Johnson_UBVRIJHKL.U | Filter Description | Filter ID (?) : | Generic/Johnson_UBVRIJHKL.U |
| Description (?) : | Johnson UBVRIJHKL system, U filter |
| Phot.System (?) : | Johnson_UBVRIJHKL |
| Detector Type (?) : | Energy counter |
| Band Name (?) : | U |
| Obs. Facility (?) : | ------ |
| Instrument (?) : | ------ |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
3511.89 | ------- | (Angstrom) |
| λmean (?) : |
3531.05 | ------- | (Angstrom) |
| λcen (?) : |
3520.30 | ------- | (Angstrom) |
| λeff (?) : |
3551.05 | ------- | (Angstrom) |
| λpeak (?) : |
3600.00 | ------- | (Angstrom) |
| λpivot (?) : |
3511.89 | ------- | (Angstrom) |
| λphot (?) : |
3565.76 | ------- | (Angstrom) |
| λmin (?) : |
3010.00 | ------- | (Angstrom) |
| λmax (?) : |
4100.00 | ------- | (Angstrom) |
| Weff (?) : |
657.00 | ------- | (Angstrom) |
| FWHM (?) : |
683.73 | ------- | (Angstrom) |
| Af/AV (?) : |
1.62 | ------- | () |
| Fsun (?) : |
106.00 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
Johnson et al. 1968 Transmission components: Filterid:Generic/Johnson_UBVRIJHKL.U
You can download here the GaiaXPy base XML file for the full Generic/Johnson_UBVRIJHKL 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 (?) : |
------- |
3.49719e-9 | (erg/cm2/s/A) |
| |
------- |
1438.73 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Generic/Johnson_UBVRIJHKL.U/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
8.82605e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Generic/Johnson_UBVRIJHKL.U/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
1493.78 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Generic/Johnson_UBVRIJHKL.U/ST |
| |
|
Filter added: 2017-07-27 02:22:29
Last update: 2021-07-27 19:15:12 |
| Generic/Johnson_UBVRIJHKL.B | 4382.77 | 4427.13 | 4361.93 | 3617.09 | 5553.00 | 1011.70 | 4318.32 | 6.74e-9 | | | Johnson UBVRIJHKL system, B filter |
| Generic/Johnson_UBVRIJHKL.V | 5501.40 | 5537.16 | 5467.57 | 4698.00 | 7204.00 | 889.80 | 3617.50 | 3.58e-9 | | | Johnson UBVRIJHKL system, V filter |
| Generic/Johnson_UBVRIJHKL.R | 6819.05 | 6939.52 | 6695.83 | 5233.33 | 9400.00 | 2070.00 | 2908.68 | 1.88e-9 | | | Johnson UBVRIJHKL system, R filter |
| Generic/Johnson_UBVRIJHKL.I | 8657.44 | 8780.66 | 8568.89 | 7000.00 | 11800.00 | 2316.00 | 2309.23 | 9.24e-10 | | | Johnson UBVRIJHKL system, I filter |
| Generic/Johnson_UBVRIJHKL.J | 12317.30 | 12487.81 | 12094.21 | 9693.00 | 15507.00 | 3193.55 | 1603.94 | 3.17e-10 | | | Johnson UBVRIJHKL system, J filter |
| Generic/Johnson_UBVRIJHKL.H | 16396.38 | 16464.36 | 16303.58 | 14613.20 | 18301.00 | 2862.63 | 1014.83 | 1.13e-10 | | | Johnson UBVRIJHKL system, H filter |
| Generic/Johnson_UBVRIJHKL.K | 21735.85 | 21951.17 | 21429.69 | 18050.00 | 25937.50 | 5785.00 | 656.62 | 4.17e-11 | | | Johnson UBVRIJHKL system, K filter |
| Generic/Johnson_UBVRIJHKL.LII | 34133.59 | 34370.90 | 33782.78 | 29071.43 | 41500.00 | 7010.00 | 291.96 | 7.51e-12 | | | Johnson UBVRIJHKL system, LII filter |
| Generic/Johnson_UBVRIJHKL.LI | 35023.93 | 35395.45 | 34481.23 | 29071.43 | 42750.00 | 8800.00 | 281.08 | 6.87e-12 | | | Johnson UBVRIJHKL system, LI filter |
| Generic/Johnson_UBVRIJHKL.M | 49749.05 | 50311.17 | 48906.07 | 41250.00 | 62500.00 | 11280.00 | 148.25 | 1.8e-12 | | | Johnson UBVRIJHKL system, M filter |
| Generic/Johnson_UBVRIJHKL.N | 98704.78 | 103240.50 | 92060.34 | 70196.00 | 136000.00 | 43744.90 | 43.16 | 1.33e-13 | | | Johnson UBVRIJHKL system, N filter |
 ≡ 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=3531.0502283105&id=Generic/Johnson_UBVRIJHKL.U><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=3551.0524592918&id=Generic/Johnson_UBVRIJHKL.U><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=3511.8859170862&id=Generic/Johnson_UBVRIJHKL.U><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=3565.763174732&id=Generic/Johnson_UBVRIJHKL.U><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=657.0000000004,3520.2967673556,1&id=Generic/Johnson_UBVRIJHKL.U><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}
