fix: correct values and references for CFHTLS, COSMOS, LSST, DES, HSC, Euclid

surveycodex/data/CFHTLS.yaml

@@ -11,35 +11,35 @@ filters:
     sky_brightness: 21.20
     full_exposure_time: 3000
     zeropoint: 25.78
-    psf_fwhm: 0.81
+    psf_fwhm: 0.85
     effective_wavelength: 382.329
   g:
     name: "g"
     sky_brightness: 21.30
     full_exposure_time: 2500
     zeropoint: 27.11
-    psf_fwhm: 0.84
+    psf_fwhm: 0.78
     effective_wavelength: 487.737
   r:
     name: "r"
     sky_brightness: 20.80
     full_exposure_time: 2000
     zeropoint: 26.74
-    psf_fwhm: 0.73
+    psf_fwhm: 0.71
     effective_wavelength: 623.062
   i:
     name: "i"
     sky_brightness: 20.30
     full_exposure_time: 4305
     zeropoint: 26.22
-    psf_fwhm: 0.66
-    effective_wavelength: 716.766
+    psf_fwhm: 0.64
+    effective_wavelength: 761.766
   z:
     name: "z"
     sky_brightness: 19.40
     full_exposure_time: 3600
-    zeropoint: 25.05
-    psf_fwhm: 0.66
+    zeropoint: 25.02
+    psf_fwhm: 0.68
     effective_wavelength: 882.798
 references:
   pixel_scale:
@@ -68,7 +68,7 @@ references:
     comment: ""
   psf_fwhm:
     link: "https://www.cfht.hawaii.edu/Science/CFHTLS/T0007"
-    comment: "roughly taken from figure 25"
+    comment: "Table 4 band means"
   effective_wavelength:
     link: "https://cosmos.astro.caltech.edu/page/filterset"
     comment: ""

surveycodex/data/COSMOS.yaml

@@ -19,7 +19,7 @@ references:
     comment: "See section 4"
   gain:
     link: "https://iopscience.iop.org/article/10.1086/520086"
-    comment: "See section 2.1"
+    comment: "See section 2.1 — observations obtained with gain of 1"
   mirror_diameter:
     link: "https://arxiv.org/abs/1203.0002"
     comment: "(v1) See section 4 table 1"
@@ -30,8 +30,8 @@ references:
     link: ""
     comment: "Space telescope"
   sky_brightness:
-    link: ""
-    comment: ""
+    link: "https://galsim-developers.github.io/GalSim/_build/html/real_gal.html"
+    comment: "Standard HST/ACS F814W zodiacal sky background used in GalSim COSMOS simulations"
   full_exposure_time:
     link: "https://iopscience.iop.org/article/10.1086/520086"
     comment: "See section 2.2"

surveycodex/data/DES.yaml

@@ -49,7 +49,7 @@ references:
     comment: "disk of 1.651m - obscuration is 1.651^2/3.934^2 which returns the right effective area"
   zeropoint_airmass:
     link: "https://speclite.readthedocs.io/en/latest/filters.html#decam-2014-filters"
-    comment: ""
+    comment: "decam2014 filters use a reference atmosphere with airmass 1.3 (Ting Li)"
   sky_brightness:
     link: "https://arxiv.org/abs/1801.03181"
     comment: "(v3) See table 1"

surveycodex/data/Euclid_VIS.yaml

@@ -10,7 +10,7 @@ filters:
     name: "IE"
     sky_brightness: 22.3203
     full_exposure_time: 565
-    zeropoint: 25.91
+    zeropoint: 25.92
     psf_fwhm: 0.17
     effective_wavelength: 750.637
 references:

surveycodex/data/HSC.yaml

@@ -38,7 +38,7 @@ filters:
     name: "y"
     sky_brightness: 17.9
     full_exposure_time: 1200
-    zeropoint: 27.33
+    zeropoint: 27.34
     psf_fwhm: 0.68
     effective_wavelength: 978.695
 references:
@@ -58,8 +58,8 @@ references:
     link: "https://speclite.readthedocs.io/en/latest/filters.html#hsc-filters"
     comment: ""
   sky_brightness:
-    link: "https://www.naoj.org/Observing/Instruments/SCam/exptime.html"
-    comment: ""
+    link: "https://web.archive.org/web/20211206142259/https://www.naoj.org/Observing/Instruments/SCam/exptime.html"
+    comment: "Suprime-Cam values used as approximation for HSC (archived page)"
   full_exposure_time:
     link: "https://arxiv.org/abs/2108.13045"
     comment: "(v1) See \"Wide\" in table 1"
@@ -72,11 +72,3 @@ references:
   effective_wavelength:
     link: "https://speclite.readthedocs.io/en/latest/filters.html#hsc-filters"
     comment: "computed with speclite – see scripts/check_effective_wavelength.py"
-
-# Notes
-# -----
-# The reference link for sky_brightness for Suprime-Cam, should be approximately okay.
-# Here is the updated version for HSC as of July 2021
-# https://www.subarutelescope.org/Observing/Instruments/HSC/hsc_etc_report.html.
-# We could update the numbers to this version, although we need to
-# convert the unit from ADU/sec to mag/arcsec^2.

surveycodex/data/LSST.yaml

@@ -10,51 +10,51 @@ filters:
     name: "u"
     sky_brightness: 22.99
     full_exposure_time: 1680
-    zeropoint: 26.40
+    zeropoint: 26.44
     psf_fwhm: 0.90
     effective_wavelength: 368.141
   g:
     name: "g"
     sky_brightness: 22.26
     full_exposure_time: 2400
-    zeropoint: 28.26
+    zeropoint: 28.29
     psf_fwhm: 0.86
     effective_wavelength: 486.412
   r:
     name: "r"
     sky_brightness: 21.20
     full_exposure_time: 5520
-    zeropoint: 28.10
+    zeropoint: 28.13
     psf_fwhm: 0.81
     effective_wavelength: 624.976
   i:
     name: "i"
     sky_brightness: 20.48
     full_exposure_time: 5520
-    zeropoint: 27.78
+    zeropoint: 27.81
     psf_fwhm: 0.79
     effective_wavelength: 756.469
   z:
     name: "z"
     sky_brightness: 19.60
     full_exposure_time: 4800
-    zeropoint: 27.39
+    zeropoint: 27.42
     psf_fwhm: 0.77
     effective_wavelength: 870.164
   y:
     name: "y"
     sky_brightness: 18.61
     full_exposure_time: 4800
-    zeropoint: 26.56
+    zeropoint: 26.59
     psf_fwhm: 0.76
     effective_wavelength: 972.202
 references:
   pixel_scale:
     link: "https://www.lsst.org/about/camera/features"
     comment: "See Technical details."
   gain:
-    link: "https://github.com/LSSTDESC/imSim/blob/main/imsim/stamp.py#L416"
-    comment: ""
+    link: "https://github.com/LSSTDESC/imSim/blob/main/imsim/readout.py"
+    comment: "In imSim, the e-image is in electrons and gain is applied per-amplifier from the camera model during readout. A gain of 1.0 is the simulation convention for the e-image."
   mirror_diameter:
     link: "https://www.lsst.org/about/tel-site/optical_design"
     comment: ""