| GCPD/Johnson.U_Landolt | 3376.53 | 3416.49 | 3455.72 | 2756.30 | 4209.57 | 939.50 | 1417.81 | 3.73e-9 | | | Johnson U filter in GCPD-Landolt 1983 |
| GCPD/Johnson.U_ADPS | 3478.95 | 3502.06 | 3529.42 | 2953.82 | 4086.11 | 680.40 | 1448.62 | 3.59e-9 | | | Johnson U filter in GCPD-UBV (ADPS) |
| GCPD/Johnson.U_Mendoza | 3516.76 | 3536.13 | 3569.64 | 3012.50 | 4100.00 | 658.00 | 1500.25 | 3.64e-9 | | | Johnson U filter in GCPD-UBVRI, Mendoza (ADPS) |
| GCPD/Johnson.U | 3595.21 | 3618.23 | 3678.27 | 2956.44 | 4164.86 | 580.76 | 1810.85 | 4.2e-9 | | | Johnson U filter in GCPD (revised by Mann & von Braun 2014) |
| GCPD/Johnson.U | Filter Description | Filter ID (?) : | GCPD/Johnson.U |
| Description (?) : | Johnson U filter in GCPD (revised by Mann & von Braun 2014) |
| Phot.System (?) : | Johnson |
| Detector Type (?) : | Energy counter |
| Band Name (?) : | U |
| Obs. Facility (?) : | ------ |
| Instrument (?) : | ------ |
| Comments (?) : | 0.33m and 2.08m (reflector), Mc Donald Obs.
RCA 1P21
Corning 9863
Johnson & Morgan 1953: http://adsabs.harvard.edu/abs/1953ApJ...117..313J
|
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
3595.21 | ------- | (Angstrom) |
| λmean (?) : |
3618.23 | ------- | (Angstrom) |
| λcen (?) : |
3649.17 | ------- | (Angstrom) |
| λeff (?) : |
3678.27 | ------- | (Angstrom) |
| λpeak (?) : |
3752.00 | ------- | (Angstrom) |
| λpivot (?) : |
3595.21 | ------- | (Angstrom) |
| λphot (?) : |
3694.01 | ------- | (Angstrom) |
| λmin (?) : |
2956.44 | ------- | (Angstrom) |
| λmax (?) : |
4164.86 | ------- | (Angstrom) |
| Weff (?) : |
580.76 | ------- | (Angstrom) |
| FWHM (?) : |
560.32 | ------- | (Angstrom) |
| Af/AV (?) : |
1.58 | ------- | () |
| Fsun (?) : |
104.44 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
Mann & von Braun 2014 Transmission components: Filter + Instrumentid:GCPD/Johnson.U
You can download here the GaiaXPy base XML file for the full GCPD/Johnson 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 (?) : |
------- |
4.20007e-9 | (erg/cm2/s/A) |
| |
------- |
1810.85 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
GCPD/Johnson.U/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
8.42168e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
GCPD/Johnson.U/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
1565.50 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
GCPD/Johnson.U/ST |
| |
Reference for calibration:
Mann & von Braun 2014 |
Filter added: 2014-12-07 04:48:32
Last update: 2022-05-04 15:54:33 |
| GCPD/Johnson.U_Straizys | 3628.32 | 3641.75 | 3682.04 | 3102.63 | 4114.29 | 452.90 | 1681.07 | 3.83e-9 | | | Johnson U filter in GCPD-UBV, Straizys (ADPS) |
| GCPD/Johnson.B_Landolt | 4284.08 | 4313.35 | 4299.24 | 3613.13 | 5112.72 | 843.11 | 3931.98 | 6.42e-9 | | | Johnson U filter in GCPD-Landolt 1983 |
| GCPD/Johnson.B | 4368.39 | 4410.00 | 4365.05 | 3614.50 | 5413.33 | 992.11 | 4015.68 | 6.31e-9 | | | Johnson B filter in GCPD (revised by Mann & von Braun 2014) |
| GCPD/Johnson.B_ADPS | 4382.27 | 4424.66 | 4373.16 | 3681.25 | 5496.15 | 987.70 | 4015.00 | 6.27e-9 | | | Johnson B filter in GCPD-UBV (ADPS) |
| GCPD/Johnson.B_Mendoza | 4399.08 | 4439.29 | 4389.23 | 3675.00 | 5500.00 | 950.00 | 4030.23 | 6.24e-9 | | | Johnson B filter in GCPD-UBVRI, Mendoza (ADPS) |
| GCPD/Johnson.B_Straizys | 4404.96 | 4448.06 | 4394.48 | 3661.76 | 5500.00 | 1010.30 | 4019.91 | 6.21e-9 | | | Johnson B filter in GCPD-UBV, Straizys (ADPS) |
| GCPD/Johnson.V_Landolt | 5419.17 | 5446.49 | 5393.85 | 4796.16 | 6454.89 | 870.58 | 3665.97 | 3.74e-9 | | | Johnson V filter in GCPD-Landolt 1983 |
| GCPD/Johnson.V_Straizys | 5469.97 | 5504.67 | 5438.23 | 4766.67 | 6900.00 | 870.65 | 3633.35 | 3.64e-9 | | | Johnson V filter in GCPD-UBV, Straizys (ADPS) |
| GCPD/Johnson.V | 5486.31 | 5523.92 | 5451.77 | 4742.58 | 6862.30 | 870.34 | 3620.46 | 3.61e-9 | | | Johnson V filter in GCPD (revised by Mann & von Braun 2014) |
| GCPD/Johnson.V_Mendoza | 5499.25 | 5535.47 | 5465.48 | 4700.00 | 7300.00 | 902.35 | 3618.01 | 3.59e-9 | | | Johnson V filter in GCPD-UBVRI, Mendoza (ADPS) |
| GCPD/Johnson.V_ADPS | 5506.99 | 5543.04 | 5472.95 | 4666.67 | 7033.33 | 898.93 | 3613.57 | 3.57e-9 | | | Johnson V filter in GCPD-UBV (ADPS) |
| GCPD/Johnson.R_Landolt | 6440.70 | 6541.21 | 6342.86 | 5403.70 | 8853.86 | 1638.87 | 3081.62 | 2.23e-9 | | | Johnson R filter in GCPD-Landolt 1983 |
| GCPD/Johnson.R_Mendoza | 6815.27 | 6936.12 | 6692.02 | 5250.00 | 9450.00 | 2071.50 | 2906.54 | 1.88e-9 | | | Johnson R filter in GCPD-UBVRI, Mendoza (ADPS) |
| GCPD/Johnson.R | 7047.92 | 7112.40 | 6985.86 | 5962.25 | 8977.90 | 1528.51 | 2763.77 | 1.67e-9 | | | Johnson R filter in GCPD-UBVRI, Mendoza (revised by Mann & von Braun 2014) |
| GCPD/Johnson.I_Landolt | 8065.80 | 8102.66 | 8025.63 | 6892.24 | 9041.47 | 1322.81 | 2385.34 | 1.1e-9 | | | Johnson I filter in GCPD-Landolt 1983 |
| GCPD/Johnson.I_Mendoza | 8654.25 | 8776.81 | 8563.43 | 6900.00 | 11800.00 | 2312.00 | 2305.95 | 9.23e-10 | | | Johnson I filter in GCPD-UBVRI, Mendoza (ADPS) |
 ≡ 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=3618.2323829137&id=GCPD/Johnson.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=3678.2730132491&id=GCPD/Johnson.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=3595.2081099997&id=GCPD/Johnson.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=3694.0075126925&id=GCPD/Johnson.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=580.76485164316,3649.1670260557,1&id=GCPD/Johnson.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}
