class SourceSnapshotIntegrationTest(FileReadingTestCase):
def path(self, relative):
return self.get_abs_path("data/image_reading/%s" % relative)
def setUp(self):
test_file = self.path("realstest2.measure3.reals.astrom")
astrom_data = AstromParser().parse(test_file)
self.reading = astrom_data.get_sources()[0].get_reading(0)
# Load the real image
hdulist = fits.open(self.path("cutout-1616687p.fits"))
with open(self.path("1616687p10.apcor")) as fh:
apcor = ApcorData.from_string(fh.read())
# NOTE: the test image
# vos://cadc.nrc.ca~vospace/OSSOS/dbimages/1616687/1616687p.fits
# has cutout: [11][1449:1199,1429:1179] and is inverted.
#
# Therefore the first reading at (772.13, 3334.70) in observed
# coordinates is at
# (NAX1 - max cutout x, NAX2 - max cutout y)
# = (2112 - 1449, 4644 - 1429) = (663, 3215)
self.original_pixel_x = 663
self.original_pixel_y = 3215
self.original_observed_x = 772.13
self.original_observed_y = 3334.70
x_offset = self.original_observed_x - self.original_pixel_x
y_offset = self.original_observed_y - self.original_pixel_y
self.undertest = SourceCutout(self.reading, hdulist,
CoordinateConverter(x_offset, y_offset),
apcor=apcor)
assert_that(self.undertest.observed_x, equal_to(self.original_observed_x))
assert_that(self.undertest.observed_y, equal_to(self.original_observed_y))
assert_that(self.undertest.pixel_x, equal_to(self.original_pixel_x))
assert_that(self.undertest.pixel_y, equal_to(self.original_pixel_y))
@patch("ossos.wcs.xy2sky")
def test_update_ra_dec(self, mock_xy2sky):
new_ra = 2000.0
new_dec = -11.0
mock_xy2sky.return_value = (new_ra, new_dec)
diff_x = 5.5
diff_y = 4.5
new_pixel_x = self.original_pixel_x + diff_x
new_pixel_y = self.original_pixel_y + diff_y
self.undertest.update_pixel_location((new_pixel_x, new_pixel_y))
assert_that(self.undertest.ra, equal_to(new_ra))
assert_that(self.undertest.dec, equal_to(new_dec))
# Check it was called with the correct values:
# x, y, crpix1, crpix2, crval1, crval2, cd, pv, nord
# These values from FITS header:
crpix1 = 6.779623933420000E+03
crpix2 = -3.343209710100000E+03
crval1 = 211.828420000
crval2 = -11.8333100000
# CD1_1, CD1_2, CD2_1, CD2_2
cd = [[-5.156837193510000E-05, -3.588985558218000E-07],
[-1.674871346376000E-07, 5.178515755263000E-05]]
# PV1_0 - PV1_10, PV2_0 - PV2_10
pv = [[-1.909806626877E-03, 1.00815723310, 1.983393486250E-03,
0.00000000000, 4.623172227977E-05, -1.020423075276E-05,
2.258600565396E-05, -2.354656733463E-02, -1.671912720931E-04,
-2.339051960031E-02, -2.903290518437E-05],
[-7.294883106769E-04, 1.00392029973, 1.983331686156E-03,
0.00000000000, 3.022667872225E-05, 4.509364811534E-05,
-5.385195875663E-06, -2.333221106141E-02, -1.789051786060E-04,
-2.348803123711E-02, -2.465552723903E-05]]
# NORDFIT
nord = 3
# NOTE: the x and y passed in must be the updated OBSERVED coordinates
mock_xy2sky.assert_called_once_with(
new_pixel_x, new_pixel_y,
crpix1, crpix2, crval1, crval2,
cd, pv, nord)
@patch("ossos.daophot.phot_mag")
def test_get_observed_magnitude(self, mock_phot_mag):
self.undertest.get_observed_magnitude()
# NOTE: the x and y passed in must be the PIXEL coordinates
mock_phot_mag.assert_called_once_with(
ANY,
self.original_pixel_x,
self.original_pixel_y,
aperture=5.0,
sky=21.0,
swidth=5.0,
apcor=0.23,
maxcount=30000.0)
