| WHT/ULTRACAM.u_s_noatm | 3451.27 | 3461.40 | 3472.63 | 3190.33 | 3936.09 | 252.70 | 1347.44 | 3.39e-9 | WHT | ULTRACAM | Super SDSS u_s filter (no atm.) |
| WHT/ULTRACAM.u_noatm | 3453.32 | 3461.81 | 3466.72 | 3197.85 | 3865.00 | 224.12 | 1322.49 | 3.32e-9 | WHT | ULTRACAM | SDSS u' filter (no atm.) |
| WHT/ULTRACAM.u | 3467.03 | 3475.59 | 3481.87 | 3202.93 | 3871.21 | 212.97 | 1335.88 | 3.33e-9 | WHT | ULTRACAM | SDSS u' filter (full) |
| WHT/ULTRACAM.u_s | 3467.41 | 3477.80 | 3491.37 | 3195.19 | 3938.99 | 239.41 | 1367.83 | 3.41e-9 | WHT | ULTRACAM | Super SDSS u_s filter (full) |
| WHT/ULTRACAM.NB3500_noatm | 3524.55 | 3524.90 | 3524.75 | 3443.91 | 3608.91 | 78.78 | 1313.42 | 3.17e-9 | WHT | ULTRACAM | NB3500 filter (no atm.) |
| WHT/ULTRACAM.NB3500 | 3524.99 | 3525.34 | 3525.18 | 3444.34 | 3609.40 | 79.02 | 1313.64 | 3.17e-9 | WHT | ULTRACAM | NB3500 filter (full) |
| WHT/ULTRACAM.NB3500_filter | 3527.70 | 3528.23 | 3527.95 | 3429.09 | 3637.46 | 104.02 | 1314.19 | 3.17e-9 | WHT | ULTRACAM | NB3500 filter (filter only) |
| WHT/ULTRACAM.u_filter | 3513.74 | 3529.69 | 3555.96 | 3069.25 | 3997.31 | 577.26 | 1475.49 | 3.58e-9 | WHT | ULTRACAM | SDSS u' filter (filter only) |
| WHT/ULTRACAM.u_s_filter | 3529.17 | 3552.94 | 3607.93 | 3068.13 | 3980.58 | 721.76 | 1667.80 | 4.01e-9 | WHT | ULTRACAM | Super SDSS u_s filter (filter only) |
| WHT/ULTRACAM.NB4170_noatm | 4203.18 | 4203.33 | 4203.08 | 4146.10 | 4266.52 | 53.96 | 4626.13 | 7.85e-9 | WHT | ULTRACAM | NB4170 filter (no atm.) |
| WHT/ULTRACAM.NB4170 | 4203.27 | 4203.42 | 4203.17 | 4146.20 | 4266.66 | 54.01 | 4626.06 | 7.85e-9 | WHT | ULTRACAM | NB4170 filter (full) |
| WHT/ULTRACAM.NB4170_filter | 4203.35 | 4203.49 | 4203.24 | 4146.47 | 4266.38 | 53.87 | 4626.09 | 7.85e-9 | WHT | ULTRACAM | NB4170 filter (filter only) |
| WHT/ULTRACAM.bowen_noatm | 4700.40 | 4700.96 | 4699.72 | 4572.57 | 4833.71 | 113.40 | 4210.47 | 5.71e-9 | WHT | ULTRACAM | CIII/NIII_HeII Bowen filter (no atm.) |
| WHT/ULTRACAM.bowen | 4700.58 | 4701.13 | 4699.89 | 4572.92 | 4834.06 | 113.36 | 4210.26 | 5.71e-9 | WHT | ULTRACAM | CIII/NIII_HeII Bowen filter (full) |
| WHT/ULTRACAM.bowen_filter | 4702.26 | 4702.82 | 4701.56 | 4575.89 | 4837.03 | 113.41 | 4208.27 | 5.71e-9 | WHT | ULTRACAM | CIII/NIII_HeII Bowen filter (filter only) |
| WHT/ULTRACAM.g_s_noatm | 4724.37 | 4782.69 | 4682.52 | 3950.81 | 5560.19 | 1201.64 | 4034.71 | 5.42e-9 | WHT | ULTRACAM | Super SDSS g_s filter (no atm.) |
| WHT/ULTRACAM.g_s_filter | 4732.72 | 4792.05 | 4689.76 | 3950.00 | 5574.70 | 1303.98 | 4023.94 | 5.39e-9 | WHT | ULTRACAM | Super SDSS g_s filter (filter only) |
| WHT/ULTRACAM.g_s | 4746.18 | 4803.57 | 4704.49 | 3952.65 | 5560.40 | 1145.80 | 4024.28 | 5.36e-9 | WHT | ULTRACAM | Super SDSS g_s filter (full) |
| WHT/ULTRACAM.g_noatm | 4781.84 | 4840.59 | 4739.93 | 3883.92 | 5680.03 | 1158.58 | 3999.24 | 5.24e-9 | WHT | ULTRACAM | SDSS g' filter (no atm.) |
| WHT/ULTRACAM.g_noatm | Filter Description | Filter ID (?) : | WHT/ULTRACAM.g_noatm |
| Description (?) : | SDSS g' filter (no atm.) |
| Phot.System (?) : | ULTRACAM |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | g |
| Obs. Facility (?) : | WHT |
| Instrument (?) : | ULTRACAM |
| Comments (?) : | Full transmision, including:
* collimator (WHT)
* dichroic 1 transmision
* dichroic 2 reflection
* camera
* CCD window
* CCD
|
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
4781.84 | ------- | (Angstrom) |
| λmean (?) : |
4840.59 | ------- | (Angstrom) |
| λcen (?) : |
4843.46 | ------- | (Angstrom) |
| λeff (?) : |
4739.93 | ------- | (Angstrom) |
| λpeak (?) : |
5284.09 | ------- | (Angstrom) |
| λpivot (?) : |
4781.84 | ------- | (Angstrom) |
| λphot (?) : |
4778.98 | ------- | (Angstrom) |
| λmin (?) : |
3883.92 | ------- | (Angstrom) |
| λmax (?) : |
5680.03 | ------- | (Angstrom) |
| Weff (?) : |
1158.58 | ------- | (Angstrom) |
| FWHM (?) : |
1358.74 | ------- | (Angstrom) |
| Af/AV (?) : |
1.19 | ------- | () |
| Fsun (?) : |
188.15 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
github: throughput models for hipercam/ultracam/ultraspec Transmission components: Filter + Instrumentid:WHT/ULTRACAM.g_noatm
You can download here the GaiaXPy base XML file for the full WHT/ULTRACAM 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 (?) : |
------- |
5.24334e-9 | (erg/cm2/s/A) |
| |
------- |
3999.24 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
WHT/ULTRACAM.g_noatm/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
4.76054e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
WHT/ULTRACAM.g_noatm/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
2769.47 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
WHT/ULTRACAM.g_noatm/ST |
| |
|
Filter added: 2020-01-22 19:06:52
Last update: 2021-07-27 20:46:05 |
| WHT/ULTRACAM.g | 4803.01 | 4860.50 | 4761.35 | 3887.61 | 5680.24 | 1111.66 | 3989.84 | 5.19e-9 | WHT | ULTRACAM | SDSS g' filter (full) |
| WHT/ULTRACAM.g_filter | 4805.07 | 4866.95 | 4760.33 | 3874.85 | 5727.12 | 1332.04 | 3980.33 | 5.17e-9 | WHT | ULTRACAM | SDSS g' filter (filter only) |
| WHT/ULTRACAM.bcont_filter | 5192.75 | 5193.67 | 5191.78 | 5022.04 | 5364.53 | 163.63 | 3805.33 | 4.23e-9 | WHT | ULTRACAM | Blue continuum filter (filter only) |
| WHT/ULTRACAM.bcont_noatm | 5194.54 | 5195.43 | 5193.58 | 5026.23 | 5361.63 | 158.74 | 3803.88 | 4.23e-9 | WHT | ULTRACAM | Blue continuum filter (no atm.) |
| WHT/ULTRACAM.bcont | 5194.67 | 5195.56 | 5193.72 | 5026.63 | 5361.73 | 158.43 | 3803.77 | 4.23e-9 | WHT | ULTRACAM | Blue continuum filter (full) |
| WHT/ULTRACAM.NaI_filter | 5961.89 | 5964.35 | 5959.28 | 5690.34 | 6241.24 | 306.94 | 3319.22 | 2.8e-9 | WHT | ULTRACAM | NaI filter (filter only) |
| WHT/ULTRACAM.NaI_noatm | 5961.99 | 5964.44 | 5959.42 | 5698.63 | 6239.75 | 305.47 | 3319.13 | 2.8e-9 | WHT | ULTRACAM | NaI filter (no atm.) |
| WHT/ULTRACAM.NaI | 5962.44 | 5964.89 | 5959.86 | 5699.16 | 6240.26 | 304.31 | 3318.86 | 2.8e-9 | WHT | ULTRACAM | NaI filter (full) |
| WHT/ULTRACAM.rcont_noatm | 6059.69 | 6060.14 | 6059.21 | 5930.63 | 6192.08 | 122.61 | 3259.57 | 2.66e-9 | WHT | ULTRACAM | Red Continuum filter (no atm.) |
| WHT/ULTRACAM.rcont_filter | 6059.73 | 6060.19 | 6059.25 | 5930.54 | 6192.87 | 123.10 | 3259.56 | 2.66e-9 | WHT | ULTRACAM | Red continuum filter (filter only) |
| WHT/ULTRACAM.rcont | 6059.82 | 6060.28 | 6059.34 | 5930.76 | 6192.29 | 122.53 | 3259.50 | 2.66e-9 | WHT | ULTRACAM | Red continuum filter (full) |
| WHT/ULTRACAM.r_s_filter | 6214.35 | 6252.78 | 6170.75 | 5464.89 | 7001.38 | 1259.05 | 3166.42 | 2.46e-9 | WHT | ULTRACAM | Super SDSS r_s filter (filter only) |
| WHT/ULTRACAM.r_s_noatm | 6249.62 | 6285.35 | 6208.84 | 5487.57 | 7002.05 | 1150.49 | 3144.43 | 2.41e-9 | WHT | ULTRACAM | Super SDSS r_s filter (no atm.) |
| WHT/ULTRACAM.r_s | 6255.86 | 6291.38 | 6215.21 | 5488.79 | 7002.03 | 1107.74 | 3140.21 | 2.41e-9 | WHT | ULTRACAM | Super SDSS r_s filter (full) |
| WHT/ULTRACAM.r_filter | 6263.63 | 6300.10 | 6222.25 | 5473.22 | 7178.39 | 1214.07 | 3137.14 | 2.4e-9 | WHT | ULTRACAM | SDSS r' filter (filter only) |
| WHT/ULTRACAM.r_noatm | 6288.51 | 6323.24 | 6249.08 | 5492.11 | 7184.49 | 1146.68 | 3122.08 | 2.37e-9 | WHT | ULTRACAM | SDSS r' filter (no atm.) |
| WHT/ULTRACAM.r | 6294.77 | 6329.29 | 6255.47 | 5493.23 | 7181.57 | 1107.40 | 3117.93 | 2.36e-9 | WHT | ULTRACAM | SDSS r' filter (full) |
| WHT/ULTRACAM.Ha_broad_filter | 6610.12 | 6610.37 | 6612.34 | 6507.32 | 6712.34 | 97.36 | 2758.05 | 1.89e-9 | WHT | ULTRACAM | Halpha broad filter (filter only) |
| WHT/ULTRACAM.Ha_broad_noatm | 6610.25 | 6610.51 | 6612.47 | 6507.58 | 6712.43 | 97.11 | 2758.87 | 1.89e-9 | WHT | ULTRACAM | Halpha broad filter (no atm.) |
| WHT/ULTRACAM.Ha_broad | 6610.33 | 6610.59 | 6612.55 | 6507.70 | 6712.51 | 96.99 | 2759.36 | 1.89e-9 | WHT | ULTRACAM | Halpha broad filter (full) |
| WHT/ULTRACAM.Ha_narrow_filter | 6618.95 | 6619.04 | 6619.49 | 6557.69 | 6681.29 | 54.11 | 2874.83 | 1.97e-9 | WHT | ULTRACAM | Halpha narrow filter (filter only) |
| WHT/ULTRACAM.Ha_narrow_noatm | 6618.99 | 6619.09 | 6619.53 | 6557.77 | 6681.33 | 54.08 | 2875.04 | 1.97e-9 | WHT | ULTRACAM | Halpha narrow filter (no atm.) |
| WHT/ULTRACAM.Ha_narrow | 6619.02 | 6619.11 | 6619.56 | 6557.81 | 6681.36 | 54.07 | 2875.16 | 1.97e-9 | WHT | ULTRACAM | Halpha narrow filter (full) |
| WHT/ULTRACAM.clear_noatm | 7256.52 | 7544.76 | 6992.82 | 4361.35 | 10498.00 | 3041.70 | 2799.14 | 1.59e-9 | WHT | ULTRACAM | Clear filter (no atm.) |
| WHT/ULTRACAM.clear | 7272.88 | 7557.97 | 7011.39 | 4367.47 | 10498.00 | 2951.20 | 2790.69 | 1.58e-9 | WHT | ULTRACAM | Clear filter (full) |
| WHT/ULTRACAM.i_noatm | 7614.29 | 7642.11 | 7583.78 | 6865.11 | 8522.99 | 1110.75 | 2543.36 | 1.32e-9 | WHT | ULTRACAM | SDSS i' filter (no atm.) |
| WHT/ULTRACAM.i | 7616.32 | 7644.62 | 7585.25 | 6869.83 | 8523.40 | 1079.45 | 2542.72 | 1.31e-9 | WHT | ULTRACAM | SDSS i' filter (full) |
| WHT/ULTRACAM.i_s_noatm | 7638.19 | 7670.56 | 7602.98 | 6908.95 | 8572.19 | 1192.61 | 2535.73 | 1.3e-9 | WHT | ULTRACAM | Super SDSS i_s filter (no atm.) |
| WHT/ULTRACAM.i_s | 7641.16 | 7674.14 | 7605.25 | 6910.51 | 8572.84 | 1169.09 | 2534.79 | 1.3e-9 | WHT | ULTRACAM | Super SDSS i_s filter (full) |
| WHT/ULTRACAM.i_filter | 7693.40 | 7723.49 | 7659.83 | 6866.10 | 8551.57 | 1247.39 | 2513.78 | 1.27e-9 | WHT | ULTRACAM | SDSS i' filter (filter only) |
| WHT/ULTRACAM.i_s_filter | 7735.04 | 7770.43 | 7695.70 | 6910.73 | 8593.68 | 1362.20 | 2499.99 | 1.25e-9 | WHT | ULTRACAM | Super SDSS i_s filter (filter only) |
| WHT/ULTRACAM.clear_filter | 6590.10 | 7778.81 | 6041.85 | 3033.03 | 11033.00 | 5144.72 | 2759.67 | 1.9e-9 | WHT | ULTRACAM | Clear filter (filter only) |
| WHT/ULTRACAM.iz | 8163.84 | 8298.11 | 8057.70 | 6806.65 | 10500.00 | 1906.34 | 2434.44 | 1.1e-9 | WHT | ULTRACAM | SDSS i'+z' filter (full) |
| WHT/ULTRACAM.iz_noatm | 8164.46 | 8299.26 | 8058.39 | 6806.17 | 10500.00 | 1959.82 | 2435.73 | 1.1e-9 | WHT | ULTRACAM | SDSS i'+z' filter (no atm.) |
| WHT/ULTRACAM.z | 9119.57 | 9168.25 | 9092.25 | 8013.81 | 10495.90 | 1567.73 | 2226.12 | 8.02e-10 | WHT | ULTRACAM | SDSS z' filter (full) |
| WHT/ULTRACAM.z_s | 9126.59 | 9172.83 | 9101.27 | 8208.27 | 10498.50 | 1440.94 | 2223.58 | 8.0e-10 | WHT | ULTRACAM | Super SDSS z_s filter (full) |
| WHT/ULTRACAM.z_noatm | 9128.51 | 9175.82 | 9102.09 | 8013.69 | 10495.90 | 1626.70 | 2227.56 | 8.01e-10 | WHT | ULTRACAM | SDSS z' filter (no atm.) |
| WHT/ULTRACAM.z_s_noatm | 9136.12 | 9180.99 | 9111.69 | 8207.53 | 10498.50 | 1501.60 | 2225.03 | 7.99e-10 | WHT | ULTRACAM | Super SDSS z_s filter (no atm.) |
| WHT/ULTRACAM.iz_filter | 8969.69 | 9192.83 | 8779.99 | 6817.65 | 11045.00 | 3291.67 | 2278.69 | 8.49e-10 | WHT | ULTRACAM | SDSS i'+z' filter (filter only) |
| WHT/ULTRACAM.z_s_filter | 9668.46 | 9762.66 | 9588.58 | 8225.71 | 11048.50 | 2369.15 | 2133.72 | 6.84e-10 | WHT | ULTRACAM | Super SDSS z_s filter (filter only) |
| WHT/ULTRACAM.z_filter | 10145.90 | 10314.94 | 9981.73 | 8053.96 | 12050.90 | 3154.32 | 2041.53 | 5.95e-10 | WHT | ULTRACAM | SDSS z' filter (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=4840.5904151729&id=WHT/ULTRACAM.g_noatm><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=4739.928078647&id=WHT/ULTRACAM.g_noatm><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=4781.84165234&id=WHT/ULTRACAM.g_noatm><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=4778.9828722648&id=WHT/ULTRACAM.g_noatm><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=1158.5783141062,4843.4594246362,1&id=WHT/ULTRACAM.g_noatm><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}
