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include <mach.h>
include <imhdr.h>
include "../lib/daophotdef.h"
include "../lib/apseldef.h"
define EXPAND 8
# DP_SUBSTAR -- Subtract the scaled and shifted PSF from the data
procedure dp_substar (dao, inim, exfd, ex_text, outim)
pointer dao # pointer to the DAOPHOT structure
pointer inim # pointer to the input image
int exfd # exclude file descriptor
bool ex_text # text or table exclude file
pointer outim # pointer to the output image
real pradius, psfradsq, x, y, dxfrom_psf, dyfrom_psf, mag, tx, ty
real rel_bright, maxgdata
pointer apsel, psffit, buf, sp, index
int i, id, line1, line2, nline_buf, x1, x2, y1, y2
int lowy, highy, offset, nstars, ier
int dp_restars()
begin
# Get the daophot pointers.
apsel = DP_APSEL (dao)
psffit = DP_PSFFIT (dao)
# Exit gracefully if there are no stars.
#if (DP_APNUM(apsel) <= 0) {
#call printf ("The number of stars in the photometry list is %d\n")
#call pargi (DP_APNUM(apsel))
#return
#}
# Check for stars to be excluded.
if (exfd != NULL) {
if (dp_restars (dao, inim, exfd, ex_text) <= 0)
;
}
# Compute the size of subraster to read from the PSF image.
if (DP_PSFSIZE(dao) == 0)
pradius = DP_PSFRAD(dao)
else
pradius = (real (DP_PSFSIZE(psffit) - 1) / 2.0 - 1.0) / 2.0
psfradsq = pradius * pradius
# Set the maximum good bad limit.
if (IS_INDEFR (DP_MAXGDATA(dao)))
maxgdata = MAX_REAL
else
maxgdata = DP_MAXGDATA(dao)
# Get some working memory.
call smark (sp)
call salloc (index, DP_APNUM (apsel), TY_INT)
# Sort the photometry on increasing Y.
if (DP_APNUM(apsel) > 0)
call quick (Memr[DP_APYCEN(apsel)], DP_APNUM(apsel), Memi[index],
ier)
# Initialize the boundary of the buffer.
buf = NULL
line1 = 0
line2 = 0
nline_buf = EXPAND * pradius
nstars = 0
do i = 1, DP_APNUM (apsel) {
# Get the data for the next star.
offset = Memi[index+i-1] - 1
x = Memr[DP_APXCEN(apsel)+offset]
y = Memr[DP_APYCEN(apsel)+i-1]
id = Memi[DP_APID(apsel)+offset]
mag = Memr[DP_APMAG (apsel)+offset]
call dp_wpsf (dao, inim, x, y, dxfrom_psf, dyfrom_psf, 1)
dxfrom_psf = (dxfrom_psf - 1.0) / DP_PSFX(psffit) - 1.0
dyfrom_psf = (dyfrom_psf - 1.0) / DP_PSFY(psffit) - 1.0
# Reject star is the magnitude is INDEF.
if (IS_INDEFR(x) || IS_INDEFR(y) || IS_INDEFR(mag)) {
if (DP_VERBOSE(dao) == YES) {
if (IS_INDEFR(x) || IS_INDEFR(y)) {
tx = x
ty = y
} else
call dp_wout (dao, inim, x, y, tx, ty, 1)
call printf (
"REJECTING - Star:%5d X =%8.2f Y =%8.2f Mag =%8.2f\n")
call pargi (id)
call pargr (tx)
call pargr (ty)
call pargr (mag)
}
next
}
# Print out the verbose message.
if (DP_VERBOSE(dao) == YES) {
call dp_wout (dao, inim, x, y, tx, ty, 1)
call printf (
"SUBTRACTING - Star:%5d X =%8.2f Y =%8.2f Mag =%8.2f\n")
call pargi (id)
call pargr (tx)
call pargr (ty)
call pargr (mag)
}
# Determine the range of lines required.
lowy = max (1, int (y - pradius) + 1)
highy = min (IM_LEN (inim, 2), int (y + pradius))
if (highy > line2) {
line1 = max (1, lowy)
line2 = min (line1 + nline_buf, IM_LEN (inim, 2))
call dp_gimbufr (inim, outim, line1, line2, buf, false)
}
# Change coordinates to reference frame of buffer.
y = y - line1 + 1.0
y1 = max (1, int (y - pradius) + 1)
y2 = min (line2 - line1 + 1, int (y + pradius))
x1 = max (1, int (x - pradius) + 1)
x2 = min (IM_LEN (inim, 1), int (x + pradius))
# Computee the relative brightness.
rel_bright = DAO_RELBRIGHT (psffit, mag)
# Subtract this star.
call dp_sstar (dao, Memr[buf], int (IM_LEN(inim,1)), nline_buf,
x1, x2, y1, y2, x, y, psfradsq, rel_bright, dxfrom_psf,
dyfrom_psf, maxgdata)
nstars = nstars + 1
}
# Flush the remaining lines in the image buffer.
call dp_gimbufr (inim, outim, y1, y2, buf, true)
# Summarize data on the number of stars subtracted.
if (DP_VERBOSE(dao) == YES) {
call printf (
"\nA total of %d stars were subtracted out of a possible %d\n")
call pargi (nstars)
call pargi (DP_APNUM(apsel))
}
# Free memory.
call sfree (sp)
end
# DP_SSTAR -- Subtract the star from the image.
procedure dp_sstar (dao, data, nx, ny, x1, x2, y1, y2, xstar, ystar, psfradsq,
rel_bright, dxfrom_psf, dyfrom_psf, maxgdata)
pointer dao # pointer to the daophot structure
real data[nx,ny] # sata buffer
int nx, ny # size of buffer
int x1, x2, y1, y2 # area of interest
real xstar, ystar # position of star to subtract
real psfradsq # PSF radius ** 2
real rel_bright # relative brightness of star
real dxfrom_psf, dyfrom_psf # not currently used
real maxgdata # maximum good data
int ix, iy
pointer psffit
real dx, dy, dxsq, dysq, radsq, dvdx, dvdy
real dp_usepsf()
begin
psffit = DP_PSFFIT(dao)
do iy = y1, y2 {
dy = real (iy) - ystar
dysq = dy * dy
do ix = x1, x2 {
if (data[ix,iy] > maxgdata)
next
dx = real (ix) - xstar
dxsq = dx * dx
radsq = dxsq + dysq
if (radsq >= psfradsq) {
if (dx > 0.0)
break
next
}
data[ix,iy] = data[ix,iy] - rel_bright *
dp_usepsf (DP_PSFUNCTION(psffit), dx, dy,
DP_PSFHEIGHT(psffit), Memr[DP_PSFPARS(psffit)],
Memr[DP_PSFLUT(psffit)], DP_PSFSIZE(psffit),
DP_NVLTABLE(psffit), DP_NFEXTABLE(psffit),
dxfrom_psf, dyfrom_psf, dvdx, dvdy)
}
}
end
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