Tibeuleu/FOC_Reduction
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save raw flux in fits file and display

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This commit is contained in:
Thibault Barnouin
2025-03-19 16:38:36 +01:00
parent dea36b2535
commit 02f8d5213c
4 changed files with 230 additions and 138 deletions
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26
package/lib/fits.py
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@@ -47,9 +47,9 @@ def get_obs_data(infiles, data_folder="", compute_flux=False):
wcs_array.append(WCS(header=f[0].header, fobj=f).celestial)
f.flush()
# Save pixel area for flux density computation
if headers[i]["PXFORMT"] == "NORMAL":
if "PXFORMT" in headers[i].keys() and headers[i]["PXFORMT"] == "NORMAL":
headers[i]["PXAREA"] = 1.96e-4 # 14x14 milliarcsec squared pixel area in arcsec^2
elif headers[i]["PXFORMT"] == "ZOOM":
elif "PXFORMT" in headers[i].keys() and headers[i]["PXFORMT"] == "ZOOM":
headers[i]["PXAREA"] = 4.06e-4 # 29x14 milliarcsec squared pixel area in arcsec^2
else:
headers[i]["PXAREA"] = 1.0 # unknown default to 1 arcsec^2
@@ -85,10 +85,10 @@ def get_obs_data(infiles, data_folder="", compute_flux=False):
# force WCS for POL60 to have same pixel size as POL0 and POL120
is_pol60 = np.array([head["filtnam1"].lower() == "pol60" for head in headers], dtype=bool)
cdelt = np.round(np.array([WCS(head).wcs.cdelt[:2] for head in headers]), 10)
if np.unique(cdelt[np.logical_not(is_pol60)], axis=0).size != 2:
if np.any(is_pol60) and np.unique(cdelt[np.logical_not(is_pol60)], axis=0).size != 2:
print(np.unique(cdelt[np.logical_not(is_pol60)], axis=0))
raise ValueError("Not all images have same pixel size")
else:
elif np.any(is_pol60):
for i in np.arange(len(headers))[is_pol60]:
headers[i]["cdelt1"], headers[i]["cdelt2"] = np.unique(cdelt[np.logical_not(is_pol60)], axis=0)[0]
@@ -174,7 +174,7 @@ def save_Stokes(
header["PROPOSID"] = (header_stokes["PROPOSID"], "PEP proposal identifier for observation")
header["TARGNAME"] = (header_stokes["TARGNAME"], "Target name")
header["ORIENTAT"] = (header_stokes["ORIENTAT"], "Angle between North and the y-axis of the image")
header["FILENAME"] = (filename, "ORIGINAL FILENAME")
header["FILENAME"] = (filename, "Original filename")
header["BKG_TYPE"] = (header_stokes["BKG_TYPE"], "Bkg estimation method used during reduction")
header["BKG_SUB"] = (header_stokes["BKG_SUB"], "Amount of bkg subtracted from images")
header["SMOOTH"] = (header_stokes["SMOOTH"] if "SMOOTH" in list(header_stokes.keys()) else "None", "Smoothing method used during reduction")
@@ -210,7 +210,7 @@ def save_Stokes(
# Create HDUList object
hdul = fits.HDUList([])
# Add I_stokes as PrimaryHDU
# Add Flux density as PrimaryHDU
if flux_data is None:
header["datatype"] = ("I_stokes", "type of data stored in the HDU")
I_stokes[(1 - data_mask).astype(bool)] = 0.0
@@ -218,10 +218,16 @@ def save_Stokes(
primary_hdu.name = "I_stokes"
hdul.append(primary_hdu)
else:
flux_head["TELESCOP"], flux_head["INSTRUME"] = header["TELESCOP"], header["INSTRUME"]
header["datatype"] = ("Flux map", "type of data stored in the HDU")
primary_hdu = fits.PrimaryHDU(data=flux_data, header=flux_head)
primary_hdu.name = "Flux map"
flux_head["FILENAME"] = header["FILENAME"]
head = WCS(flux_head).deepcopy().to_header()
for key in [key for key in header.keys() if key not in ["SMOOTH", "SAMPLING"]]:
try:
head[key] = flux_head[key]
except KeyError:
head[key] = header[key]
header["datatype"] = ("Flux_density", "type of data stored in the HDU")
primary_hdu = fits.PrimaryHDU(data=flux_data, header=head)
primary_hdu.name = "Flux_density"
hdul.append(primary_hdu)
header["datatype"] = ("I_stokes", "type of data stored in the HDU")
I_stokes[(1 - data_mask).astype(bool)] = 0.0