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# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
from pylab import *
from numpy import *
from math import *
# I can never remember where all the bands are...
rawdata = [
# min max mid fwhm label-offset
('galex', 'fuv', 135, 175, 0, 0, 0),
('galex', 'nuv', 175, 280, 0, 0, 0),
('usnob', 'B [OJ]', 350, 540, 0, 0, 0),
('usnob', 'R [EF]', 590, 690, 0, 0, 1),
('usnob', 'N', 715, 900, 0, 0, 0),
# Wikipedia:UBV... says: 364 nm for U, 442 nm for B, 540 nm for V.
('Johnson', 'U', 0,0, 364, 200, 0),
('Johnson', 'B', 375,500, 0,0,1),
('Johnson', 'V', 500,600, 0,0,0),
('Johnson', 'R', 550,725, 0,0,1),
('Johnson', 'I', 725,875, 0,0,0),
('sdss', 'u', 0, 0, 354, 57, 0),
('sdss', 'g', 0, 0, 477, 137, 1),
('sdss', 'r', 0, 0, 623, 137, 0),
('sdss', 'i', 0, 0, 763, 153, 1),
('sdss', 'z', 0, 0, 913, 95, 0),
# I got these from eyeballing the synphot throughputs
('hst', '275', 250, 300, 0, 0, 0),
('hst', '336', 310, 370, 0, 0, 1),
('hst', '475', 400, 550, 0, 0, 0),
('hst', '814', 700, 950, 0, 0, 0),
('hst', '110', 900,1400, 0, 0, 1),
('hst', '160',1400,1700, 0, 0, 0),
('ukidss','Z', 830, 925, 0, 0, 0),
('ukidss','Y', 970, 1070, 0, 0, 1),
('ukidss','J',1170, 1330, 0, 0, 0),
('ukidss','H',1490, 1780, 0, 0, 1),
('ukidss','K',2030, 2370, 0, 0, 0),
('2mass', 'J', 0, 0, 1240, 0, 0),
('2mass', 'H', 0, 0, 1600, 0, 0),
('2mass', 'Ks', 0, 0, 2160, 0, 0),
('spitzer', '1', 0, 0, 3600, 0, 0),
('spitzer', '2', 0, 0, 4500, 0, 0),
('spitzer', '3', 0, 0, 5800, 0, 0),
('spitzer', '4', 0, 0, 8000, 0, 0),
]
surveys = array([survey for (survey, band, a,b,c,d,e) in rawdata])
los = array([lo or mid - fwhm/2. for (survey, band, lo, hi, mid, fwhm, e) in rawdata])
his = array([hi or mid + fwhm/2. for (survey, band, lo, hi, mid, fwhm, e) in rawdata])
survs = set(surveys)
surveymids = {}
surveylos = {}
for s in survs:
surveymids[s] = sqrt(los[surveys == s].min() * his[surveys == s].max())
surveylos[s] = los[surveys == s].min()
ymargin = 0.1
xmargin = 1.1
clf()
lastsurvey = ''
h = 0
for (survey, band, mn, mx, mid, fwhm, off) in rawdata:
lo = mn or mid - fwhm/2.
hi = mx or mid + fwhm/2.
if survey != lastsurvey:
h += 1
text(surveylos[survey] / xmargin, h, survey,
horizontalalignment='right',
verticalalignment='center')
lastsurvey = survey
semilogx([lo, hi], [h, h], 'ko-')
text(sqrt(lo*hi), h+ymargin, band,
horizontalalignment='center',
verticalalignment='bottom',
fontsize='10')
if mn:
txt = '%g-%g' % (mn, mx)
else:
if fwhm:
txt = '%g(%g)' % (mid, fwhm)
else:
txt = '%g' % (mid)
text(sqrt(lo*hi), h-1.5*(ymargin*(1+off)), txt,
horizontalalignment='center',
verticalalignment='top',
fontsize='7')
a=axis()
axis([70, 1.1e4, 0, h+1])
y0 = 0.1
y1 = 0.25
mx = 1.0e4
mn = 75
for (x, y, txt) in [(1e-11, y0, 'Gamma'),
(1e-9, y1, 'X-ray'),
(400e-9, y0, 'purple'),
(500e-9, y1, 'green'),
(700e-9, y0, 'red'),
(10e-6, y0, 'infrared'),
]:
ha = 'left'
x /= 1e-9
if x >= mx:
x = mx
ha = 'right'
if x < mn:
x = mn
text(x, y, txt,
verticalalignment='bottom',
horizontalalignment=ha,
fontsize='8')
xticks([100, 1000, 10000], ['100 nm', '1 um', '10 um'])
yticks([],[])
xlabel('Wavelength')
title('Bands')
savefig('bands.png')
# USNOB
# http://www.iop.org/EJ/article/1538-3881/125/2/984/202452.tb1.html
# (B)
# O: 350-500 nm
# J: 385-540 nm
# : 395-540
# (R)
# E: 620-670 nm
# F: 610-690 nm
# : 630-690
# : 590-690
# (N)
# N: 730-900 nm
# : 715-900
# 2MASS
# http://www.ipac.caltech.edu/2mass/releases/allsky/doc/sec1_1.new.html
# J: 1.24 um
# H: 1.66 um
# Ks: 2.16 um
# SDSS
# http://www.astro.princeton.edu/PBOOK/camera/camera.htm
# 5 channels
# u: 354 +- 57/2 nm
# g: blue-green 477 +- 137/2 nm
# r: red 623 +- 137/2 nm
# i: far-red 763 +- 153/2 nm
# z: near-infrared 913 +- 95/2 nm
# Spitzer - IRAC
# http://www.spitzer.caltech.edu/technology/irac.shtml
# 4 channels
# 5.12 x 5.12 arcmin
# 3.6, 4.5, 5.8, and 8 microns
# 256 x 256 pixels
# GALEX
# http://www.galex.caltech.edu/QUICKFACTS/quickfacts.html
# fuv: 135 to 175 nm
# nuv: 175 to 280 nm
# HST
# many!
# http://www.stsci.edu/hst/acs/documents/handbooks/cycle17/c05_imaging2.html#356971
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