Keck :W.M. Keck Observatory Keck/NIRC2 :NIRC2 is a near-infrared imager designed for the Keck adaptive optics system. |
| Keck/NIRC2.J | 12474.17 | 12501.55 | 12434.47 | 11489.94 | 13483.32 | 1501.51 | 1558.92 | 3.02e-10 | Keck | NIRC2 | NIRC2 J | | Keck/NIRC2.Hcont | 15852.99 | 15853.56 | 15851.95 | 15623.46 | 16067.00 | 225.10 | 1075.48 | 1.28e-10 | Keck | NIRC2 | NIRC2 Hcont | | Keck/NIRC2.H | 16288.16 | 16358.26 | 16197.95 | 14503.18 | 18088.55 | 2791.15 | 1040.40 | 1.19e-10 | Keck | NIRC2 | NIRC2 H | | Keck/NIRC2.Fell | 16500.15 | 16500.76 | 16502.35 | 16260.17 | 16739.53 | 247.66 | 1019.34 | 1.12e-10 | Keck | NIRC2 | NIRC2 Fell | | Keck/NIRC2.Kp | 21196.37 | 21271.98 | 21084.52 | 19133.89 | 23328.72 | 3211.93 | 686.49 | 4.63e-11 | Keck | NIRC2 | NIRC2 Kp | | Keck/NIRC2.Ks | 21442.42 | 21499.93 | 21354.70 | 19544.06 | 23365.41 | 2931.49 | 674.11 | 4.43e-11 | Keck | NIRC2 | NIRC2 Ks | | Keck/NIRC2.Brgamma | 21571.59 | 21571.97 | 21568.45 | 21348.78 | 21781.29 | 202.28 | 644.70 | 4.15e-11 | Keck | NIRC2 | NIRC2 Brgamma | | Keck/NIRC2.K | 21959.73 | 22025.28 | 21862.08 | 19863.93 | 23970.97 | 3048.72 | 646.74 | 4.06e-11 | Keck | NIRC2 | NIRC2 K | | Keck/NIRC2.K | Filter Description | Filter ID (?) : | Keck/NIRC2.K |
| Description (?) : | NIRC2 K |
| Phot.System (?) : | NIRC2 |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | K |
| Obs. Facility (?) : | Keck |
| Instrument (?) : | NIRC2 |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
21959.73 | ------- | (Angstrom) |
| λmean (?) : |
22025.28 | ------- | (Angstrom) |
| λcen (?) : |
21956.40 | ------- | (Angstrom) |
| λeff (?) : |
21862.08 | ------- | (Angstrom) |
| λpeak (?) : |
22896.06 | ------- | (Angstrom) |
| λpivot (?) : |
21959.73 | ------- | (Angstrom) |
| λphot (?) : |
21906.07 | ------- | (Angstrom) |
| λmin (?) : |
19863.93 | ------- | (Angstrom) |
| λmax (?) : |
23970.97 | ------- | (Angstrom) |
| Weff (?) : |
3048.72 | ------- | (Angstrom) |
| FWHM (?) : |
3349.22 | ------- | (Angstrom) |
| Af/AV (?) : |
0.123 | ------- | () |
| Fsun (?) : |
8.29 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
Keck: NIRC2 Transmission components: Filter | | Calibration properties
Vega System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
4.05668e-11 | (erg/cm2/s/A) |
| |
------- |
646.74 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRC2.K/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
2.27753e-10 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRC2.K/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
57887.97 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRC2.K/ST |
| |
|
Filter added: 2011-10-18 05:26:02
Last update: 2020-12-10 16:32:20 | | Keck/NIRC2.Kcont | 22875.65 | 22876.51 | 22874.36 | 22524.69 | 23201.53 | 318.68 | 605.77 | 3.47e-11 | Keck | NIRC2 | NIRC2 Kcont | | Keck/NIRC2.Lp | 37701.30 | 37869.18 | 37433.02 | 33266.22 | 42202.33 | 6325.37 | 246.72 | 5.28e-12 | Keck | NIRC2 | NIRC2 Lp | | Keck/NIRC2.Ms | 46687.61 | 46705.30 | 46659.97 | 44965.02 | 48650.44 | 2414.21 | 165.71 | 2.28e-12 | Keck | NIRC2 | NIRC2 Ms |
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 ≡ filter transmission<p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></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.SpectralAxis.Coverage.Bounds.Extent</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>Utype</b>: <i>photdm:PhotometricSystem.detectorType</i></ul></td></table>',WIDTH,400)){kind=link}
 ≡ filter transmission<p><img src=showgraph.php?what=lmean&val=22025.277766297&id=Keck/NIRC2.K><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:em.wl<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Location.Value</i></ul></td></table>',STICKY,true,CLOSEBTN,true,WIDTH,400)){kind=link}
 ≡ filter transmission (photon counter)<br> Vg(λ) ≡ Vega spectrum<p><img src=showgraph.php?what=leff&val=21862.075596473&id=Keck/NIRC2.K><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=21959.734864169&id=Keck/NIRC2.K><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 (photon counter)<br> Vg(λ) ≡ Vega spectrum<p><img src=showgraph.php?what=lphot&val=21906.072401421&id=Keck/NIRC2.K><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=3048.7169021645,21956.399291925,0.95829&id=Keck/NIRC2.K><p><u>Property info:</u><ul><li><b>Unit</b>:Angstrom<li><b>UCD</b>:instr.bandwidth<li><b>Utype</b>: <i>photdm:PhotometryFilter.SpectralAxis.Coverage.Bounds.Extent</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/extinctionlaw.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 (photon counter).<br> Sun(λ) ≡ Sun spectrum.<p><img src=images/sunspec.png><p><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 (photon counter).<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>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}
