| Swift/UVOT.UVW2_fil | 2023.44 | 2109.91 | 2052.50 | 1600.00 | 4310.00 | 744.22 | 744.84 | 5.45e-9 | Swift | UVOT | Swift UVOT UVW2 filter transmission (filter only) |
| Swift/UVOT.UVW2_trn | 2049.89 | 2130.69 | 2075.69 | 1600.00 | 4310.00 | 672.52 | 753.35 | 5.37e-9 | Swift | UVOT | Swift UVOT UVW2 filter full transmission |
| Swift/UVOT.UVW2 | 2054.61 | 2140.26 | 2083.95 | 1597.49 | 3479.70 | 667.73 | 755.14 | 5.36e-9 | Swift | UVOT | UVOT UVW2 filter effective area |
| Swift/UVOT.UVM2_fil | 2246.31 | 2271.29 | 2244.31 | 1600.00 | 3110.00 | 530.47 | 785.58 | 4.67e-9 | Swift | UVOT | Swift UVOT UVM2 filter transmission (filter only) |
| Swift/UVOT.UVM2 | 2246.43 | 2272.71 | 2245.03 | 1699.08 | 2964.30 | 533.85 | 787.63 | 4.68e-9 | Swift | UVOT | UVOT UVM2 filter effective area |
| Swift/UVOT.UVM2_trn | 2248.59 | 2274.02 | 2246.56 | 1605.69 | 3110.00 | 532.04 | 786.13 | 4.66e-9 | Swift | UVOT | Swift UVOT UVM2 filter full transmission |
| Swift/UVOT.UVW1 | 2580.74 | 2688.46 | 2681.67 | 1614.34 | 4730.01 | 801.92 | 921.00 | 4.15e-9 | Swift | UVOT | UVOT UVW1 filter effective area |
| Swift/UVOT.UVW1_trn | 2628.38 | 2726.30 | 2715.68 | 1600.00 | 5970.00 | 831.94 | 926.84 | 4.02e-9 | Swift | UVOT | Swift UVOT UVW1 filter full transmission |
| Swift/UVOT.UVW1_fil | 2640.53 | 2763.97 | 2755.79 | 1600.00 | 5970.00 | 868.60 | 940.99 | 4.05e-9 | Swift | UVOT | Swift UVOT UVW1 filter transmission (filter only) |
| Swift/UVOT.U | 3467.05 | 3492.67 | 3520.88 | 3017.59 | 4781.22 | 662.50 | 1457.11 | 3.63e-9 | Swift | UVOT | UVOT U filter effective area |
| Swift/UVOT.U_trn | 3469.55 | 3495.11 | 3523.78 | 3010.00 | 4794.86 | 658.46 | 1460.59 | 3.64e-9 | Swift | UVOT | Swift UVOT U filter full transmission |
| Swift/UVOT.U_fil | 3472.18 | 3499.02 | 3529.90 | 3010.06 | 4797.89 | 672.86 | 1465.67 | 3.64e-9 | Swift | UVOT | Swift UVOT U filter transmission (filter only) |
| Swift/UVOT.white | 3325.21 | 4003.78 | 3875.62 | 1597.49 | 7820.43 | 3548.07 | 1678.00 | 4.55e-9 | Swift | UVOT | UVOT white filter effective area |
| Swift/UVOT.white | Filter Description | Filter ID (?) : | Swift/UVOT.white |
| Description (?) : | UVOT white filter effective area |
| Phot.System (?) : | UVOT |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | Swift |
| Instrument (?) : | UVOT |
| Comments (?) : | Take into account that there is a time-dependent, and filter-dependent decline in sensitivity for the UVOT (which reaches as much as ~30% in UVW2) since launch, and that the filter effective areas provided reflect the case at approximately mission start, so any computation of expected output in the UVOT at a given epoch after mission start, should take these degradation factors into account. The current document describing the degradation is available at
https://heasarc.gsfc.nasa.gov/docs/heasarc/caldb/swift/docs/uvot/
|
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
3325.21 | ------- | (Angstrom) |
| λmean (?) : |
4003.78 | ------- | (Angstrom) |
| λcen (?) : |
3695.66 | ------- | (Angstrom) |
| λeff (?) : |
3875.62 | ------- | (Angstrom) |
| λpeak (?) : |
3742.50 | ------- | (Angstrom) |
| λpivot (?) : |
3325.21 | ------- | (Angstrom) |
| λphot (?) : |
4243.10 | ------- | (Angstrom) |
| λmin (?) : |
1597.49 | ------- | (Angstrom) |
| λmax (?) : |
7820.43 | ------- | (Angstrom) |
| Weff (?) : |
3548.07 | ------- | (Angstrom) |
| FWHM (?) : |
3866.59 | ------- | (Angstrom) |
| Af/AV (?) : |
1.70 | ------- | () |
| Fsun (?) : |
115.39 | ------- | (erg/cm2/s/A) |
| Effective area
Data file: ascii, VOTable Reference for filter response:
HEASARC CALDB Transmission components: Filter + Instrumentid:Swift/UVOT.white
You can download here the GaiaXPy base XML file for the full Swift/UVOT 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 (?) : |
------- |
4.54963e-9 | (erg/cm2/s/A) |
| |
------- |
1678.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Swift/UVOT.white/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
9.84486e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Swift/UVOT.white/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
1339.19 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Swift/UVOT.white/ST |
| |
|
Filter added: 2014-01-17 16:32:04
Last update: 2021-07-27 20:39:07 |
| Swift/UVOT.white_trn | 3359.46 | 4040.30 | 3907.98 | 1600.00 | 7928.90 | 3542.81 | 1707.87 | 4.54e-9 | Swift | UVOT | Swift UVOT white filter full transmission |
| Swift/UVOT.B | 4349.56 | 4377.97 | 4345.28 | 3702.38 | 4995.23 | 866.22 | 4088.50 | 6.48e-9 | Swift | UVOT | UVOT B filter effective area |
| Swift/UVOT.B_trn | 4350.30 | 4378.79 | 4345.96 | 3589.52 | 5090.04 | 871.93 | 4087.87 | 6.48e-9 | Swift | UVOT | Swift UVOT B filter full transmission |
| Swift/UVOT.B_fil | 4392.04 | 4420.93 | 4384.90 | 3601.99 | 5114.86 | 865.99 | 4091.34 | 6.36e-9 | Swift | UVOT | Swift UVOT B filter transmission (filter only) |
| Swift/UVOT.V | 5425.33 | 5439.64 | 5411.45 | 4932.60 | 6001.23 | 655.67 | 3657.87 | 3.73e-9 | Swift | UVOT | UVOT V filter effective area |
| Swift/UVOT.V_trn | 5426.26 | 5440.57 | 5412.38 | 4688.44 | 6133.26 | 659.82 | 3657.48 | 3.72e-9 | Swift | UVOT | Swift UVOT V filter full transmission |
| Swift/UVOT.V_fil | 5467.49 | 5482.02 | 5453.25 | 4705.85 | 6180.49 | 729.79 | 3630.98 | 3.64e-9 | Swift | UVOT | Swift UVOT V filter transmission (filter only) |
| Swift/UVOT.white_fil | 4379.88 | 5518.51 | 4805.37 | 1600.00 | 8000.00 | 3825.15 | 2103.96 | 3.29e-9 | Swift | UVOT | Swift UVOT white filter transmission (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=4003.7792150577&id=Swift/UVOT.white><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=3875.615496006&id=Swift/UVOT.white><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=3325.2071772854&id=Swift/UVOT.white><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=4243.1025102532&id=Swift/UVOT.white><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=3548.0694640588,3695.6575947063,1&id=Swift/UVOT.white><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}
