| Liverpool/IOO.SDSS-u | 3467.67 | 3489.00 | 3513.68 | 2962.56 | 3998.47 | 668.48 | 1439.07 | 3.59e-9 | LT | IO:O | IO:O SDSS u |
| Liverpool/IOO.SDSS-u_filter | 3471.11 | 3491.59 | 3514.61 | 2961.14 | 3993.89 | 639.09 | 1433.12 | 3.57e-9 | LT | IO:O | IO:O SDSS u' (filter only) |
| Liverpool/IOO.B_filter | 4359.51 | 4395.68 | 4351.22 | 3780.03 | 5761.70 | 959.93 | 4085.03 | 6.44e-9 | LT | IO:O | IO:O Bessell B (filter only) |
| Liverpool/IOO.B | 4405.39 | 4442.57 | 4394.00 | 3784.97 | 5774.39 | 932.63 | 4093.61 | 6.32e-9 | LT | IO:O | IO:O Bessell B |
| Liverpool/IOO.SDSS-g_filter | 4775.48 | 4833.65 | 4733.32 | 3937.12 | 5631.80 | 1302.84 | 3998.19 | 5.26e-9 | LT | IO:O | IO:I SDSS g' (filter only) |
| Liverpool/IOO.SDSS-g | 4834.88 | 4890.19 | 4793.46 | 3944.73 | 5633.23 | 1132.12 | 3969.29 | 5.09e-9 | LT | IO:O | IO:O SDSS g |
| Liverpool/IOO.V_filter | 5373.45 | 5400.93 | 5350.00 | 4781.75 | 6414.88 | 896.57 | 3678.35 | 3.82e-9 | LT | IO:O | IO:O Bessell V (filter only) |
| Liverpool/IOO.V | 5388.47 | 5416.16 | 5364.54 | 4784.33 | 6426.19 | 910.98 | 3670.53 | 3.79e-9 | LT | IO:O | IO:O Bessell V |
| Liverpool/IOO.SDSS-r | 6161.74 | 6197.31 | 6120.65 | 5353.49 | 7035.84 | 1252.83 | 3192.87 | 2.52e-9 | LT | IO:O | IO:O SDSS r |
| Liverpool/IOO.SDSS-r_filter | 6175.46 | 6211.04 | 6134.18 | 5356.14 | 7039.85 | 1206.52 | 3184.18 | 2.5e-9 | LT | IO:O | IO:I SDSS r' (filter only) |
| Liverpool/IOO.Halpha_filter | 6566.23 | 6566.47 | 6566.21 | 6469.45 | 6666.27 | 93.25 | 2612.61 | 1.82e-9 | LT | IO:O | IOO Halpha (filter only) (rest frame) |
| Liverpool/IOO.Halpha | 6566.28 | 6566.51 | 6566.27 | 6469.54 | 6666.34 | 93.23 | 2612.62 | 1.82e-9 | LT | IO:O | IO:O Halpha (rest frame) |
| Liverpool/IOO.Halpha | Filter Description | Filter ID (?) : | Liverpool/IOO.Halpha |
| Description (?) : | IO:O Halpha (rest frame) |
| Phot.System (?) : | ------ |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | LT |
| Instrument (?) : | IO:O |
| Comments (?) : | Filter transmission * CCD QE * cryostat window
|
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
6566.28 | ------- | (Angstrom) |
| λmean (?) : |
6566.51 | ------- | (Angstrom) |
| λcen (?) : |
6566.31 | ------- | (Angstrom) |
| λeff (?) : |
6566.27 | ------- | (Angstrom) |
| λpeak (?) : |
6570.00 | ------- | (Angstrom) |
| λpivot (?) : |
6566.28 | ------- | (Angstrom) |
| λphot (?) : |
6566.44 | ------- | (Angstrom) |
| λmin (?) : |
6469.54 | ------- | (Angstrom) |
| λmax (?) : |
6666.34 | ------- | (Angstrom) |
| Weff (?) : |
93.23 | ------- | (Angstrom) |
| FWHM (?) : |
90.15 | ------- | (Angstrom) |
| Af/AV (?) : |
0.807 | ------- | () |
| Fsun (?) : |
152.88 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
The Liverpool Telescope, IO:O Transmission components: Filter + Instrumentid:Liverpool/IOO.Halpha
You can download here the GaiaXPy base XML file for the full Liverpool/IOO 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 (?) : |
------- |
1.81659e-9 | (erg/cm2/s/A) |
| |
------- |
2612.62 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/IOO.Halpha/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
2.52469e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/IOO.Halpha/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
5222.09 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Liverpool/IOO.Halpha/ST |
| |
|
Filter added: 2020-01-09 19:46:46
Last update: 2021-07-27 20:14:03 |
| Liverpool/IOO.Halpha-6634_filter | 6635.05 | 6635.13 | 6635.17 | 6578.51 | 6693.25 | 56.50 | 2919.09 | 1.99e-9 | LT | IO:O | IOO Halpha (filter only) (redshifted to 663.4 nm) |
| Liverpool/IOO.Halpha-6634 | 6635.07 | 6635.15 | 6635.19 | 6578.54 | 6693.27 | 56.49 | 2919.11 | 1.99e-9 | LT | IO:O | IO:O Halpha (redshifted to 663.4 nm) |
| Liverpool/IOO.Halpha-6705_filter | 6705.92 | 6706.00 | 6705.86 | 6646.18 | 6763.21 | 57.52 | 2920.63 | 1.95e-9 | LT | IO:O | IO:O Halpha (filter only) (redshifted to 670.5 nm) |
| Liverpool/IOO.Halpha-6705 | 6705.92 | 6706.01 | 6705.87 | 6646.20 | 6763.22 | 57.49 | 2920.63 | 1.95e-9 | LT | IO:O | IO:O Halpha (redshifted to 670.5 nm) |
| Liverpool/IOO.Halpha-6755_filter | 6756.12 | 6756.21 | 6756.02 | 6700.03 | 6817.11 | 56.92 | 2899.98 | 1.9e-9 | LT | IO:O | IOO Halpha (filter only) (redshifted to 675.5 nm) |
| Liverpool/IOO.Halpha-6755 | 6756.13 | 6756.22 | 6756.03 | 6700.04 | 6817.12 | 56.94 | 2899.97 | 1.9e-9 | LT | IO:O | IO:O Halpha (redshifted to 675.5 nm) |
| Liverpool/IOO.Halpha-6822_filter | 6823.36 | 6823.45 | 6823.29 | 6762.34 | 6883.97 | 55.09 | 2873.37 | 1.85e-9 | LT | IO:O | IOO Halpha (filter only) (redshifted to 682.2 nm) |
| Liverpool/IOO.Halpha-6822 | 6823.36 | 6823.45 | 6823.29 | 6762.35 | 6883.97 | 55.09 | 2873.37 | 1.85e-9 | LT | IO:O | IO:O Halpha (redshifted to 682.2 nm) |
| Liverpool/IOO.SDSS-i | 7625.85 | 7658.58 | 7589.41 | 6734.33 | 8523.41 | 1350.35 | 2540.89 | 1.31e-9 | LT | IO:O | IO:O SDSS i |
| Liverpool/IOO.SDSS-i_filter | 7647.54 | 7680.58 | 7610.61 | 6737.89 | 8531.44 | 1297.87 | 2532.61 | 1.3e-9 | LT | IO:O | IO:I SDSS i' (filter only) |
| Liverpool/IOO.SDSS-z | 8988.09 | 9024.90 | 8970.57 | 8177.04 | 10458.08 | 1135.32 | 2236.70 | 8.3e-10 | LT | IO:O | IO:O SDSS z |
| Liverpool/IOO.SDSS-z_filter | 9637.93 | 9729.59 | 9561.10 | 8193.12 | 11000.00 | 2331.03 | 2139.20 | 6.9e-10 | LT | IO:O | IO:I SDSS zi' (filter only) |
 ≡ 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=6566.5138932313&id=Liverpool/IOO.Halpha><p>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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=6566.2668310124&id=Liverpool/IOO.Halpha><p>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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=6566.2771502039&id=Liverpool/IOO.Halpha><p>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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=6566.440406154&id=Liverpool/IOO.Halpha><p>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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=93.229232141286,6566.3149549962,1&id=Liverpool/IOO.Halpha><p>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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>Filter transmission is transformed to "<i>energy counter</i>" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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>Filter transmission is transformed to \"<i>energy counter</i>\" for these calculations, that is, the photon count transmission is multiplied by λ and normalized so that peak transmission is equal to 1.<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}
