Liverpool :The Liverpool Telescope Liverpool/RATCam :RATCam was the Liverpool Telescope's main workhorse optical CCD camera and was funded by PPARC (now STFC). |
| Liverpool/RATCam.sdss-u | 3522.2 | 3541.0 | 3019 | 3979 | 497.7 | 1440.5 | LT | RATCam | RATCam SDSS u' filter | | Liverpool/RATCam.bessel-B | 4384.8 | 4348.7 | 3569 | 5731 | 999.5 | 3956.0 | LT | RATCam | RATCam Bessel B filter | | Liverpool/RATCam.bessel-B | Filter Description | Filter ID (?) : | Liverpool/RATCam.bessel-B |
| Description (?) : | RATCam Bessel B filter |
| Phot.System (?) : | ------ |
| Detector Type (?) : | Energy counter |
| Band Name (?) : | B |
| Obs. Facility (?) : | LT |
| Instrument (?) : | RATCam |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λmean (?) : |
4384.83 | ------- | (Angstrom) |
| λcen (?) : |
4343.14 | ------- | (Angstrom) |
| λeff (?) : |
4348.66 | ------- | (Angstrom) |
| λpeak (?) : |
4350.00 | ------- | (Angstrom) |
| λpivot (?) : |
4344.33 | ------- | (Angstrom) |
| λphot (?) : |
4373.45 | ------- | (Angstrom) |
| λmin (?) : |
3568.70 | ------- | (Angstrom) |
| λmax (?) : |
5731.30 | ------- | (Angstrom) |
| Weff (?) : |
999.48 | ------- | (Angstrom) |
| FWHM (?) : |
980.16 | ------- | (Angstrom) |
| Af/AV (?) : |
1.32 | ------- | () |
| Fsun (?) : |
------- | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
The Liverpool Telescope, RATCam Transmission components: Filter | | Calibration properties
Vega System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
6.271e-9 | (erg/cm2/s/A) |
| |
------- |
3955.97 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/RATCam.bessel-B/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
5.756e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/RATCam.bessel-B/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
2290.43 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/RATCam.bessel-B/ST |
| |
|
Filter added: 2017-08-05 13:50:41
Last update: 2020-03-23 12:58:04 | | Liverpool/RATCam.sdss-g | 4813.9 | 4730.2 | 3945 | 5532 | 1268.7 | 3940.5 | LT | RATCam | RATCam SDSS g' filter | | Liverpool/RATCam.bessel-V | 5406.5 | 5355.3 | 4742 | 6466 | 911.0 | 3634.3 | LT | RATCam | RATCam Bessel V filter | | Liverpool/RATCam.sdss-r | 6248.1 | 6163.8 | 5423 | 7022 | 1294.9 | 3136.1 | LT | RATCam | RATCam SDSS r' filter | | Liverpool/RATCam.Halpha | 6566.7 | 6566.4 | 6465 | 6669 | 105.9 | 2660.9 | LT | RATCam | RATCam Halpha filter | | Liverpool/RATCam.sdss-i | 7764.1 | 7654.6 | 6577 | 8791 | 1682.9 | 2499.4 | LT | RATCam | RATCam SDSS i' filter | | Liverpool/RATCam.sdss-z | 10817.3 | 10212.2 | 7868 | 13400 | 4981.4 | 1879.6 | LT | RATCam | RATCam SDSS z' filter |
| Filter Plots
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© SVO, 6356 filters available, Last update: 2020-07-31 | 
 ≡ filter transmission<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<br> Vg(λ) ≡ Vega spectrum<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.SpectralAxis.Coverage.Bounds.Extent</i></ul></td></table>',WIDTH,400)){kind=link}
</b><br><table cellpadding=20><td class=helptd>Zero Point in Vega System.<p>Calculated by the service as:<p><img src=images/latex/zp.png> <p>where:<p> T(λ) ≡ 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>eff</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<p>f(λ) ≡ flux of the spectrum<p><u>Property info:</u><ul><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=4384.8289039876&id=Liverpool/RATCam.bessel-B><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></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=4348.6603523982&id=Liverpool/RATCam.bessel-B><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=4344.3316152224&id=Liverpool/RATCam.bessel-B><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=4373.4475118465&id=Liverpool/RATCam.bessel-B><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=999.48360449062,4343.1357142857,0.687&id=Liverpool/RATCam.bessel-B><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:instr.bandwidth<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Bounds.Extent</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>eff</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/extinctionlaw.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>Sun spectrum from calspec database: sun_reference_stis_002 with with sun_mod_001 for larger wavelengths.<p><img src=images/sunspec.png><p><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>eff</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>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}