diff --git a/docs/filters.rst b/docs/filters.rst index 7b24506..e50719b 100644 --- a/docs/filters.rst +++ b/docs/filters.rst @@ -1,11 +1,11 @@ Filter Response Curves ====================== -The ``data/filters/`` subdirectory contains small files with tabulated -filter response curves. All files contain a single curve stored in the ASCII -`enhanced character-separated value format -`__, which is -used to specify the wavelength units and provide the following metadata: +The ``data/filters/`` subdirectory contains small files with tabulated filter +response curves. All files contain a single curve stored in the ASCII `enhanced +character-separated value format +`__, which is used +to specify the wavelength units and provide the following metadata: +------------+-------------------------------------------------------------------------+ |Key | Description | @@ -34,8 +34,8 @@ SDSS filter responses are taken from Table 4 of `Doi et al, "Photometric Response Functions of the SDSS Imager", The Astronomical Journal, Volume 139, Issue 4, pp. 1628-1648 (2010) `__, and calculated as the -reference response multiplied by the reference APO atmospheric transmission -at an airmass 1.3. See the paper for details. +reference response multiplied by the reference APO atmospheric transmission at +an airmass 1.3. See the paper for details. The group name ``sdss2010`` is used to identify these response curves in ``speclite``. The plot below shows the output of:: @@ -62,7 +62,7 @@ with this bit of code:: 2MASS filter responses are taken from `Cohen, Wheaton & Megeath, "Spectral Irradiance Calibration in the Infrared. XIV. The Absolute Calibration of 2MASS", The Astronomical Journal, Volume 126, Issue 2, pp. 1090-1096 -(2003)`__, as tabulated by Michael +(2003) `__, as tabulated by Michael Blanton. See the paper for details. The group name ``twomass`` is used to identify these response curves in @@ -77,13 +77,14 @@ The group name ``twomass`` is used to identify these response curves in DECam DR1 Filters ----------------- -The DECam DR1 filter curves are documented in `T. M. C. Abbott et al 2018 ApJS 239 18 -`__ and available from this -`NOAO DECam page `__. These -represent the total system throughput and average instrumental response across the science CCDs. -The official curves have arbitrary normalization, but the values used here have reasonable -normalization factors applied for throughput calculations, provided by Douglas Tucker (Jan 2021, -private communication). +The DECam DR1 filter curves are documented in `T. M. C. Abbott et al 2018 ApJS +239 18 `__ and +available from this `NOAO DECam page +`__. These +represent the total system throughput and average instrumental response across +the science CCDs. The official curves have arbitrary normalization, but the +values used here have reasonable normalization factors applied for throughput +calculations, provided by Douglas Tucker (Jan 2021, private communication). There are two versions of the DR1 curves: ``decamDR1`` with an airmass 1.2 reference atmosphere, and ``decamDR1noatm`` with no atmospheric extinction:: @@ -124,11 +125,10 @@ WISE Filters WISE filter responses are taken from files linked to `this page `__ -containing the weighted mean relative spectral responses described in -`Wright et al, "The Wide-field Infrared Survey Explorer (WISE): Mission Description -and Initial On-orbit Performance", The Astronomical Journal, Volume 140, -Issue 6, pp. 1868-1881 (2010) -`__. +containing the weighted mean relative spectral responses described in `Wright et +al, "The Wide-field Infrared Survey Explorer (WISE): Mission Description and +Initial On-orbit Performance", The Astronomical Journal, Volume 140, Issue 6, +pp. 1868-1881 (2010) `__. Note that these responses are based on pre-flight measurements but the in-flight responses of the W3 and W4 filters are observed to have effective wavelengths @@ -154,9 +154,9 @@ HSC Filters ----------- HSC filter responses are taken from `here -`__. These -throughputs include a reference atmosphere with airmass 1.2. Refer to -Kawanamoto et al. 2017 (in prep). +`__. These throughputs +include a reference atmosphere with airmass 1.2. Refer to Kawanamoto et al. 2017 +(in prep). The group name ``hsc2017`` is used to identify these curves in ``speclite``. The plot below shows the output of the following command:: @@ -190,10 +190,10 @@ Johnson/Cousins Filters Reference definitions of the Johnson/Cousins "standard" filters are taken from Table 2 of `Bessell, M. S., "UBVRI passbands," PASP, vol. 102, Oct. 1990, -p. 1181-1199 `__. We use the band name "U" -for the response that Table 2 refers to as "UX". Note that these do not -represent the response of any actual instrument. Response values are normalized -to have a maximum of one in each band. +p. 1181-1199 `__. We use the band name "U" for +the response that Table 2 refers to as "UX". Note that these do not represent +the response of any actual instrument. Response values are normalized to have a +maximum of one in each band. The group name `bessell` is used to identify these response curves in ``speclite``. The plot below shows the output of the command below::