CTIO :Cerro Tololo Inter-American Observatory CTIO/DECam :Dark Energy Camera (DECam) is a high-performance, wide-field CCD imager mounted at the prime focus of the Blanco 4-m telescope at CTIO.id:CTIO/DECam.a → GaiaXPy base XML file. You can download here the GaiaXPy base XML file for the full CTIO/DECam filter set. Please, take a look to the GaiaXPy web page and additional documentation for more information. |
| CTIO/DECam.u_filter | 3552.67 | 3580.78 | 3648.48 | 3035.59 | 4039.63 | 764.48 | 1780.79 | 4.23e-9 | CTIO | DECam | DECam u filter (filter only) | | CTIO/DECam.u | 3814.33 | 3821.68 | 3856.88 | 3331.21 | 4070.00 | 263.62 | 3631.00 | 7.48e-9 | CTIO | DECam | DECam u filter (total transmission). DR1 | | CTIO/DECam.u_old | 3814.33 | 3821.68 | 3856.88 | 3342.08 | 4039.91 | 263.62 | 2709.84 | 5.58e-9 | CTIO | DECam | DECam u filter (total transmission). Old. | | CTIO/DECam.g_filter | 4714.23 | 4773.99 | 4673.24 | 3931.24 | 5554.19 | 1313.99 | 4021.80 | 5.43e-9 | CTIO | DECam | DECam g filter (filter only) | | CTIO/DECam.g_old | 4808.51 | 4862.16 | 4770.06 | 3941.56 | 5528.13 | 1004.97 | 3976.90 | 5.16e-9 | CTIO | DECam | DECam u filter (total transmission). Old. | | CTIO/DECam.g | 4808.49 | 4862.24 | 4769.90 | 3850.48 | 5574.42 | 1003.72 | 3631.00 | 4.71e-9 | CTIO | DECam | DECam g filter (total transmission). DR1 | | CTIO/DECam.VR_filter | 6218.65 | 6354.40 | 6075.85 | 4902.54 | 7656.34 | 2215.46 | 3223.17 | 2.5e-9 | CTIO | DECam | DECam VR filter (filter only) | | CTIO/DECam.r_filter | 6401.57 | 6444.80 | 6354.32 | 5620.20 | 7261.45 | 1369.09 | 3069.52 | 2.25e-9 | CTIO | DECam | DECam r filter (filter only) | | CTIO/DECam.r | 6417.65 | 6460.63 | 6370.44 | 5404.75 | 7295.86 | 1276.22 | 3631.00 | 2.64e-9 | CTIO | DECam | DECam r filter (total transmission). DR1 | | CTIO/DECam.r_old | 6420.81 | 6463.92 | 6373.47 | 5540.72 | 7239.52 | 1262.61 | 3058.46 | 2.22e-9 | CTIO | DECam | DECam r filter (total transmission). Old. | | CTIO/DECam.i_old | 7813.52 | 7849.44 | 7773.53 | 6958.98 | 8646.47 | 1267.11 | 2471.09 | 1.21e-9 | CTIO | DECam | DECam i filter (total transmission). Old. | | CTIO/DECam.i | 7814.58 | 7850.77 | 7774.30 | 6793.73 | 8694.71 | 1281.01 | 3631.00 | 1.78e-9 | CTIO | DECam | DECam i filter (total transmission). DR1 | | CTIO/DECam.i | Filter Description | Filter ID (?) : | CTIO/DECam.i |
| Description (?) : | DECam i filter (total transmission). DR1 |
| Phot.System (?) : | DECam |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | CTIO |
| Instrument (?) : | DECam |
| Comments (?) : | The system response includes the total throughput of the system (instrument + atmosphere).
|
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
7814.58 | ------- | (Angstrom) |
| λmean (?) : |
7850.77 | ------- | (Angstrom) |
| λcen (?) : |
7827.66 | ------- | (Angstrom) |
| λeff (?) : |
7774.30 | ------- | (Angstrom) |
| λpeak (?) : |
8500.00 | ------- | (Angstrom) |
| λpivot (?) : |
7814.58 | ------- | (Angstrom) |
| λphot (?) : |
7798.51 | ------- | (Angstrom) |
| λmin (?) : |
6793.73 | ------- | (Angstrom) |
| λmax (?) : |
8694.71 | ------- | (Angstrom) |
| Weff (?) : |
1281.01 | ------- | (Angstrom) |
| FWHM (?) : |
1468.81 | ------- | (Angstrom) |
| Af/AV (?) : |
0.631 | ------- | () |
| Fsun (?) : |
117.74 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
Dark Energy Camera Transmission components: Filter + Instrument + Atmosphereid:CTIO/DECam.i
You can download here the GaiaXPy base XML file for the full CTIO/DECam 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 (?) : |
------- |
1.21296e-9 | (erg/cm2/s/A) |
| |
------- |
2470.79 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
CTIO/DECam.i/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
1.78253e-9 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
CTIO/DECam.i/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
7396.33 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
CTIO/DECam.i/ST |
| |
|
Filter added: 2020-01-11 14:29:02
Last update: 2022-08-30 17:02:29 | | CTIO/DECam.i_filter | 7823.84 | 7858.77 | 7785.14 | 6988.24 | 8710.00 | 1369.58 | 2467.13 | 1.21e-9 | CTIO | DECam | DECam i filter (filter only) | | CTIO/DECam.z | 9168.85 | 9199.28 | 9154.88 | 8252.42 | 10145.17 | 1289.35 | 3631.00 | 1.29e-9 | CTIO | DECam | DECam z filter (total transmission). DR1 | | CTIO/DECam.z_old | 9169.28 | 9200.06 | 9155.10 | 8285.22 | 10103.56 | 1307.53 | 2233.56 | 7.96e-10 | CTIO | DECam | DECam z filter (total transmission). Old. | | CTIO/DECam.z_filter | 9250.01 | 9281.68 | 9233.49 | 8363.03 | 10169.17 | 1422.88 | 2227.05 | 7.8e-10 | CTIO | DECam | DECam z filter (filter only) | | CTIO/DECam.Y_old | 9892.55 | 9903.46 | 9882.83 | 9357.32 | 10731.14 | 689.97 | 2123.61 | 6.51e-10 | CTIO | DECam | DECam Y filter (total transmission). Old. | | CTIO/DECam.Y | 9896.11 | 9906.83 | 9886.45 | 9301.53 | 10698.80 | 674.51 | 3631.00 | 1.11e-9 | CTIO | DECam | DECam Y filter (total transmission). DR1 | | CTIO/DECam.Y_filter | 10086.60 | 10102.61 | 10071.12 | 9404.28 | 10806.11 | 1091.57 | 2087.35 | 6.15e-10 | CTIO | DECam | DECam Y 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=7850.7662184686&id=CTIO/DECam.i><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=7774.3016648898&id=CTIO/DECam.i><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=7814.575218371&id=CTIO/DECam.i><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=7798.5098573206&id=CTIO/DECam.i><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=1281.0057847492,7827.655401441,1&id=CTIO/DECam.i><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}
