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Now possible to position sources within a certain patch of the sky

This commit is contained in:
Hanno Spreeuw 2017-10-18 17:09:37 +02:00
parent 221b4c3ddd
commit fd32097a60
1 changed files with 16 additions and 6 deletions
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22
test/Generate_sources.py
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@ -19,9 +19,19 @@ except AssertionError:
print("Sorry, number of sources too large, reset to {0}".format(number_of_sources)) print("Sorry, number of sources too large, reset to {0}".format(number_of_sources))
# For the declinations I have chosen sources between 45 and 90 degrees declination. # Best to center sources around 3C196 if using the sm.ms measurement set with a
decl_low = 45 # four degree tolerance
decl_high = 90 tol_degrees = 4.
tol_hours = tol_degrees * 24/360
ra_3C196 = 8.
ra_low = ra_3C196 - tol_hours
ra_high = ra_3C196 + tol_hours
decl_3C196 = 48.
decl_low = decl_3C196 - tol_degrees
decl_high = decl_3C196 + tol_degrees
I_low = 10 I_low = 10
I_high = 100 I_high = 100
@ -48,7 +58,7 @@ with warnings.catch_warnings():
sources_parameters.name[source_name] = 'P' + str(source_name).zfill(number_of_digits_for_sources) sources_parameters.name[source_name] = 'P' + str(source_name).zfill(number_of_digits_for_sources)
# Right ascension can have all values. # Right ascension can have all values.
sources_parameters.rah = np.random.randint(0, 24, size=number_of_sources) sources_parameters.rah = np.random.randint(ra_low, ra_high, size=number_of_sources)
sources_parameters.ram = np.random.randint(0, 59, size=number_of_sources) sources_parameters.ram = np.random.randint(0, 59, size=number_of_sources)
sources_parameters.ras = 60 * np.random.rand(number_of_sources) sources_parameters.ras = 60 * np.random.rand(number_of_sources)
@ -88,7 +98,7 @@ with warnings.catch_warnings():
# sources_parameters.tofile("extended_source_list_using_tofile.txt", sep='\n') # sources_parameters.tofile("extended_source_list_using_tofile.txt", sep='\n')
with open("extended_source_list.txt", 'wb') as f: with open("extended_source_list_centered_on_3C196.txt", 'wb') as f:
f.write(b"## From Generate_sources.py by Hanno Spreeuw.\n") f.write(b"## From Generate_sources.py by Hanno Spreeuw.\n")
f.write(b"## Generates point sources at random positions with random brighnesses within some range.\n") f.write(b"## Generates point sources at random positions with random brighnesses within some range.\n")
f.write(b"## this is an LSM text (hms/dms) file\n") f.write(b"## this is an LSM text (hms/dms) file\n")
@ -102,5 +112,5 @@ with open("extended_source_list.txt", 'wb') as f:
# Now write the cluster file # Now write the cluster file
# First add '1' and '1' to indicate the cluster id and chunk size. # First add '1' and '1' to indicate the cluster id and chunk size.
cluster_array = np.concatenate((np.array(['1', '1']), sources_parameters.name)) cluster_array = np.concatenate((np.array(['1', '1']), sources_parameters.name))
with open("extended_source_list.txt.cluster", 'wb') as f: with open("extended_source_list_centered_on_3C196.txt.cluster", 'wb') as f:
np.savetxt(f, (cluster_array).reshape(1, cluster_array.shape[0]), fmt='%s', delimiter=' ') np.savetxt(f, (cluster_array).reshape(1, cluster_array.shape[0]), fmt='%s', delimiter=' ')