| HST/ACS_WFC.FR388N | 3881.44 | 3881.71 | 3882.75 | 3811.90 | 3951.43 | 76.26 | 3408.68 | 6.78e-9 | HST | ACS | FR388N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.FR423N | 4230.12 | 4230.39 | 4229.83 | 4159.35 | 4301.72 | 80.47 | 4593.32 | 7.7e-9 | HST | ACS | FR423N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F435W | 4329.85 | 4360.06 | 4341.62 | 3610.23 | 4883.77 | 821.68 | 4036.38 | 6.45e-9 | HST | ACS | F435W filter for HST ACS_WFC |
| HST/ACS_WFC.FR459M | 4588.26 | 4592.76 | 4584.98 | 4278.58 | 4907.27 | 357.16 | 4266.77 | 6.08e-9 | HST | ACS | FR459M ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.FR462N | 4619.85 | 4620.13 | 4619.65 | 4543.06 | 4697.34 | 87.67 | 4270.83 | 6.0e-9 | HST | ACS | FR462N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F475W | 4746.94 | 4802.31 | 4708.87 | 3863.58 | 5562.80 | 1271.56 | 4004.42 | 5.33e-9 | HST | ACS | F475W filter for HST ACS_WFC |
| HST/ACS_WFC.F502N | 5023.02 | 5023.13 | 5022.92 | 4966.53 | 5079.84 | 56.66 | 3942.88 | 4.68e-9 | HST | ACS | F502N filter for HST ACS_WFC |
| HST/ACS_WFC.FR505N | 5050.02 | 5050.39 | 5049.72 | 4955.61 | 5145.27 | 107.85 | 3924.92 | 4.61e-9 | HST | ACS | FR505N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F555W | 5361.03 | 5397.60 | 5331.75 | 4584.27 | 6208.72 | 1098.66 | 3662.24 | 3.82e-9 | HST | ACS | F555W filter for HST ACS_WFC |
| HST/ACS_WFC.FR551N | 5510.00 | 5510.30 | 5509.74 | 5425.09 | 5595.43 | 96.68 | 3598.29 | 3.55e-9 | HST | ACS | FR551N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F550M | 5581.40 | 5588.24 | 5574.75 | 5248.45 | 5931.37 | 524.66 | 3554.70 | 3.42e-9 | HST | ACS | F550M filter for HST ACS_WFC |
| HST/ACS_WFC.FR601N | 6010.12 | 6010.50 | 6009.70 | 5907.50 | 6113.41 | 117.01 | 3290.20 | 2.73e-9 | HST | ACS | FR601N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F606W | 5921.88 | 6035.73 | 5809.26 | 4634.30 | 7180.10 | 1771.88 | 3351.09 | 2.86e-9 | HST | ACS | F606W filter for HST ACS_WFC |
| HST/ACS_WFC.F625W | 6311.85 | 6352.46 | 6266.20 | 5446.00 | 7099.62 | 1232.02 | 3113.86 | 2.34e-9 | HST | ACS | F625W filter for HST ACS_WFC |
| HST/ACS_WFC.FR647M | 6469.58 | 6476.15 | 6460.06 | 6027.10 | 6925.31 | 505.58 | 2963.41 | 2.12e-9 | HST | ACS | FR647M ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.FR656N | 6559.94 | 6560.36 | 6559.08 | 6445.62 | 6675.13 | 130.78 | 2704.96 | 1.88e-9 | HST | ACS | FR656N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F658N | 6583.95 | 6584.10 | 6585.96 | 6509.98 | 6659.44 | 74.82 | 2580.25 | 1.78e-9 | HST | ACS | F658N filter for HST ACS_WFC |
| HST/ACS_WFC.F660N | 6599.46 | 6599.50 | 6600.02 | 6562.00 | 6642.91 | 35.70 | 2791.00 | 1.92e-9 | HST | ACS | F660N filter for HST ACS_WFC |
| HST/ACS_WFC.FR716N | 7159.61 | 7160.04 | 7159.19 | 7040.58 | 7279.37 | 136.46 | 2719.29 | 1.59e-9 | HST | ACS | FR716N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.POL_UV | 6634.16 | 7294.11 | 6112.33 | 3306.71 | 10881.83 | 4258.56 | 3054.58 | 2.08e-9 | HST | ACS | POL_UV filter for HST ACS_WFC |
| HST/ACS_WFC.POL_V | 6911.09 | 7523.49 | 6333.53 | 3623.57 | 10884.79 | 4289.97 | 3051.12 | 1.92e-9 | HST | ACS | POL_V filter for HST ACS_WFC |
| HST/ACS_WFC.G800L | 7471.40 | 7704.08 | 7254.82 | 5274.80 | 10827.01 | 3017.86 | 2690.29 | 1.44e-9 | HST | ACS | G800L disperser for HST ACS_WFC |
| HST/ACS_WFC.F775W | 7693.47 | 7730.77 | 7652.44 | 6803.72 | 8631.82 | 1379.43 | 2516.53 | 1.27e-9 | HST | ACS | F775W filter for HST ACS_WFC |
| HST/ACS_WFC.F775W | Filter Description | Filter ID (?) : | HST/ACS_WFC.F775W |
| Description (?) : | F775W filter for HST ACS_WFC |
| Phot.System (?) : | ACS-WFC |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | HST |
| Instrument (?) : | ACS |
| Comments (?) : | Response calculated using the stsynphot python package by STScI. In particular, function stsynphot.band("acs,wfc1,f775w"). Please, take a look to stsynphot documentation and HST instrument documentation |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
7693.47 | ------- | (Angstrom) |
| λmean (?) : |
7730.77 | ------- | (Angstrom) |
| λcen (?) : |
7763.11 | ------- | (Angstrom) |
| λeff (?) : |
7652.44 | ------- | (Angstrom) |
| λpeak (?) : |
7380.00 | ------- | (Angstrom) |
| λpivot (?) : |
7693.47 | ------- | (Angstrom) |
| λphot (?) : |
7677.00 | ------- | (Angstrom) |
| λmin (?) : |
6803.72 | ------- | (Angstrom) |
| λmax (?) : |
8631.82 | ------- | (Angstrom) |
| Weff (?) : |
1379.43 | ------- | (Angstrom) |
| FWHM (?) : |
1517.31 | ------- | (Angstrom) |
| Af/AV (?) : |
0.645 | ------- | () |
| Fsun (?) : |
121.06 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
stsynphot documentation Transmission components: Filter + CCD + Instrumentid:HST/ACS_WFC.F775W
You can download here the GaiaXPy base XML file for the full HST/ACS_WFC 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 (?) : |
------- |
1.27461e-9 | (erg/cm2/s/A) |
| |
------- |
2516.53 | (Jy) |
| PhotCal ID (?) : |
HST/ACS_WFC.F775W/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
1.83909e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| PhotCal ID (?) : |
HST/ACS_WFC.F775W/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
7168.86 | (Jy) |
| PhotCal ID (?) : |
HST/ACS_WFC.F775W/ST |
| |
|
Filter added: 2019-07-16 12:11:39
Last update: 2022-03-01 15:05:22 |
| HST/ACS_WFC.FR782N | 7818.97 | 7819.44 | 7818.58 | 7687.33 | 7951.48 | 150.41 | 2447.56 | 1.2e-9 | HST | ACS | FR782N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F814W | 8045.53 | 8129.21 | 7973.39 | 6869.59 | 9632.01 | 1888.66 | 2440.74 | 1.13e-9 | HST | ACS | F814W filter for HST ACS_WFC |
| HST/ACS_WFC.FR853N | 8528.34 | 8528.80 | 8528.02 | 8395.60 | 8661.95 | 150.70 | 2225.22 | 9.17e-10 | HST | ACS | FR853N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F892N | 8914.98 | 8915.37 | 8916.61 | 8788.92 | 9035.83 | 148.57 | 2286.48 | 8.62e-10 | HST | ACS | F892N filter for HST ACS_WFC |
| HST/ACS_WFC.FR914M | 9067.53 | 9079.84 | 9062.01 | 8350.59 | 9802.04 | 738.22 | 2258.98 | 8.24e-10 | HST | ACS | FR914M ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.F850LP | 9031.48 | 9080.26 | 9004.99 | 8007.01 | 10862.13 | 1321.98 | 2232.90 | 8.21e-10 | HST | ACS | F850LP filter for HST ACS_WFC |
| HST/ACS_WFC.FR931N | 9305.64 | 9306.31 | 9308.35 | 9133.28 | 9479.02 | 192.32 | 2238.73 | 7.75e-10 | HST | ACS | FR931N ramp filter for HST ACS_WFC at central wavelength |
| HST/ACS_WFC.FR1016N | 10149.49 | 10150.22 | 10151.30 | 9966.99 | 10335.19 | 193.21 | 2035.05 | 5.92e-10 | HST | ACS | FR1016N ramp filter for HST ACS_WFC at central wavelength |
 ≡ 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=7730.7726092384&id=HST/ACS_WFC.F775W><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=7652.4364310873&id=HST/ACS_WFC.F775W><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=7693.4707889653&id=HST/ACS_WFC.F775W><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=7677.0046829996&id=HST/ACS_WFC.F775W><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=1379.4296404911,7763.1078654325,1&id=HST/ACS_WFC.F775W><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}
