Keck :W.M. Keck Observatory Keck/NIRSPEC :NIRSPEC is a cross-dispersed echelle spectrograph designed for Keck II. It can be used with or without AO.id:Keck/NIRSPEC.a |
| Keck/NIRSPEC.N1 | 10329.56 | 10366.86 | 10284.87 | 9320.00 | 11393.58 | 1592.08 | 2015.09 | 5.66e-10 | Keck | NIRSPEC | NIRSPEC N-1 filter | | Keck/NIRSPEC.N2 | 11889.31 | 11933.76 | 11831.27 | 10710.00 | 13154.46 | 1953.22 | 1655.04 | 3.51e-10 | Keck | NIRSPEC | NIRSPEC N-2 filter | | Keck/NIRSPEC.N2 | Filter Description | Filter ID (?) : | Keck/NIRSPEC.N2 |
| Description (?) : | NIRSPEC N-2 filter |
| Phot.System (?) : | NIRSPEC |
| Detector Type (?) : | Photon counter |
| Band Name (?) : | ------ |
| Obs. Facility (?) : | Keck |
| Instrument (?) : | NIRSPEC |
| Comments (?) : | ------ |
| | Mathematical properties | Property | Calculated | Specified | Unit | | λref (?) : |
11889.31 | ------- | (Angstrom) |
| λmean (?) : |
11933.76 | ------- | (Angstrom) |
| λcen (?) : |
11917.84 | ------- | (Angstrom) |
| λeff (?) : |
11831.27 | ------- | (Angstrom) |
| λpeak (?) : |
12160.00 | ------- | (Angstrom) |
| λpivot (?) : |
11889.31 | ------- | (Angstrom) |
| λphot (?) : |
11860.25 | ------- | (Angstrom) |
| λmin (?) : |
10710.00 | ------- | (Angstrom) |
| λmax (?) : |
13154.46 | ------- | (Angstrom) |
| Weff (?) : |
1953.22 | ------- | (Angstrom) |
| FWHM (?) : |
2035.69 | ------- | (Angstrom) |
| Af/AV (?) : |
0.324 | ------- | () |
| Fsun (?) : |
49.73 | ------- | (erg/cm2/s/A) |
| Transmission
Data file: ascii, VOTable Reference for filter response:
NIRSPEC filters Transmission components: Filterid:Keck/NIRSPEC.N2 | | Calibration properties
Vega System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.51007e-10 | (erg/cm2/s/A) |
| |
------- |
1655.04 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRSPEC.N2/Vega |
| |
AB System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
7.70077e-10 | (erg/cm2/s/A) |
| |
------- |
3631.00 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRSPEC.N2/AB |
| |
ST System | Property | Specified | Calculated | Unit | | Zero Point (?) : |
------- |
3.631e-9 | (erg/cm2/s/A) |
| |
------- |
17120.58 | (Jy) |
| ZP Type (?) : |
Pogson |
| PhotCal ID (?) : |
Keck/NIRSPEC.N2/ST |
| |
|
Filter added: 2021-04-12 13:06:42
Last update: 2021-07-27 20:04:32 | | Keck/NIRSPEC.N3 | 12580.80 | 12633.36 | 12507.72 | 11260.00 | 13975.61 | 1964.70 | 1529.46 | 2.9e-10 | Keck | NIRSPEC | NIRSPEC N-3 filter | | Keck/NIRSPEC.N4 | 14110.73 | 14218.46 | 13966.21 | 12189.74 | 16125.68 | 3045.89 | 1288.15 | 1.94e-10 | Keck | NIRSPEC | NIRSPEC N-4 filter | | Keck/NIRSPEC.N5 | 16207.41 | 16318.65 | 16059.82 | 13972.37 | 18601.33 | 3334.04 | 1043.20 | 1.19e-10 | Keck | NIRSPEC | NIRSPEC N-5 filter | | Keck/NIRSPEC.FeII | 16464.50 | 16464.72 | 16466.43 | 16319.36 | 16601.73 | 151.86 | 981.14 | 1.09e-10 | Keck | NIRSPEC | NIRSPEC FeII filter | | Keck/NIRSPEC.thin | 17219.78 | 19190.21 | 14749.18 | 10000.00 | 28950.64 | 14993.44 | 1142.68 | 1.16e-10 | Keck | NIRSPEC | NIRSPEC thin blocker filter | | Keck/NIRSPEC.N6 | 19266.60 | 19634.13 | 18753.50 | 15205.59 | 23792.55 | 6537.48 | 812.95 | 6.57e-11 | Keck | NIRSPEC | NIRSPEC N-6 filter | | Keck/NIRSPEC.H2 | 21196.08 | 21196.42 | 21195.52 | 20979.55 | 21407.71 | 206.68 | 675.81 | 4.51e-11 | Keck | NIRSPEC | NIRSPEC H2 filter | | Keck/NIRSPEC.Kp | 21169.41 | 21244.69 | 21056.46 | 19094.22 | 23370.56 | 3199.36 | 679.87 | 4.55e-11 | Keck | NIRSPEC | NIRSPEC K-prime filter | | Keck/NIRSPEC.K | 21818.40 | 21911.98 | 21678.86 | 18930.10 | 24540.00 | 3881.46 | 646.46 | 4.07e-11 | Keck | NIRSPEC | NIRSPEC K filter | | Keck/NIRSPEC.N7 | 22403.43 | 22743.10 | 21895.37 | 18061.07 | 26921.34 | 6510.85 | 629.85 | 3.76e-11 | Keck | NIRSPEC | NIRSPEC N-7 filter | | Keck/NIRSPEC.KL | 31400.65 | 33143.89 | 28756.91 | 20841.62 | 43322.77 | 15780.45 | 381.71 | 1.16e-11 | Keck | NIRSPEC | NIRSPEC KL filter | | Keck/NIRSPEC.Lp | 37721.94 | 37890.57 | 37452.59 | 33280.65 | 42107.21 | 6397.50 | 243.34 | 5.13e-12 | Keck | NIRSPEC | NIRSPEC L-prime filter | | Keck/NIRSPEC.Mp | 46866.35 | 46884.01 | 46840.72 | 45083.88 | 48876.98 | 2463.25 | 160.34 | 2.19e-12 | Keck | NIRSPEC | NIRSPEC M-prime filter | | Keck/NIRSPEC.Mwide | 49535.49 | 49846.70 | 49048.13 | 43382.90 | 56906.76 | 10540.20 | 147.45 | 1.8e-12 | Keck | NIRSPEC | NIRSPEC M-wide filter |
|
| 
 ≡ 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=11933.763544599&id=Keck/NIRSPEC.N2><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=11831.271331961&id=Keck/NIRSPEC.N2><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=11889.30652372&id=Keck/NIRSPEC.N2><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=11860.245636693&id=Keck/NIRSPEC.N2><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=1953.2188504664,11917.844934423,1&id=Keck/NIRSPEC.N2><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}
