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|
include <ctype.h>
include <error.h>
include <mach.h>
define STD_TYPES "|star|blackbody|"
define UNKNOWN 0 # Unknown calibration file type
define STAR 1 # Standard star calibration file
define BLACKBODY 2 # Blackbody calibration file
define NALLOC 128 # Allocation block size
# GETCALIB -- Get flux data.
# This is either for a blackbody of specified magnitude and type or
# a specified standard star with calibration data in a database directory.
procedure getcalib (waves, dwaves, mags, nwaves)
pointer waves #O Pointer to calibration wavelengths
pointer dwaves #O Pointer to calibration bandpasses
pointer mags #O Pointer to calibration magnitudes
int nwaves #O Number of calibration points
real weff, wave, mag, dwave, wave1, wave2
int i, j, fd, nalloc
pointer sp, dir, star, name, file, type, units, band, str
pointer un, unang
bool streq()
int open(), fscan(), nscan(), getline(), strdic()
pointer un_open()
errchk getbbcal, open, un_open, un_ctranr
define getstd_ 10
begin
call smark (sp)
call salloc (dir, SZ_FNAME, TY_CHAR)
call salloc (star, SZ_FNAME, TY_CHAR)
call salloc (name, SZ_LINE, TY_CHAR)
call salloc (file, SZ_LINE, TY_CHAR)
call salloc (type, SZ_LINE, TY_CHAR)
call salloc (units, SZ_LINE, TY_CHAR)
call salloc (band, SZ_LINE, TY_CHAR)
call salloc (str, SZ_LINE, TY_CHAR)
Memc[str] = EOS
# Convert the star name to a file name and open the file.
# If an error occurs print a list of files.
getstd_ call clgstr ("caldir", Memc[dir], SZ_FNAME)
call clgstr ("star_name", Memc[star], SZ_FNAME)
call strcpy (Memc[star], Memc[name], SZ_LINE)
call strlwr (Memc[name])
j = name
for (i=name; Memc[i]!=EOS; i=i+1) {
if (IS_WHITE(Memc[i]) || Memc[i]=='+' || Memc[i]=='-')
next
Memc[j] = Memc[i]
j = j + 1
}
Memc[j] = EOS
# Check if this is an alternate name.
call sprintf (Memc[file], SZ_LINE, "%snames.men")
call pargstr (Memc[dir])
ifnoerr (fd = open (Memc[file], READ_ONLY, TEXT_FILE)) {
while (fscan (fd) != EOF) {
call gargwrd (Memc[file], SZ_LINE)
if (streq (Memc[file], Memc[name])) {
call gargwrd (Memc[name], SZ_LINE)
break
}
}
}
call sprintf (Memc[file], SZ_LINE, "%s%s.dat")
call pargstr (Memc[dir])
call pargstr (Memc[name])
iferr (fd = open (Memc[file], READ_ONLY, TEXT_FILE)) {
if (streq (Memc[file], Memc[str]))
call erract (EA_ERROR)
call strcpy (Memc[file], Memc[str], SZ_LINE)
call sprintf (Memc[file], SZ_LINE, "%sstandards.men")
call pargstr (Memc[dir])
fd = open (Memc[file], READ_ONLY, TEXT_FILE)
while (getline (fd, Memc[file]) != EOF)
call putline (STDERR, Memc[file])
call close (fd)
Memc[star] = EOS
goto getstd_
}
# Read the calibration data.
type = STAR
call strcpy ("angstroms", Memc[units], SZ_LINE)
Memc[band] = EOS
weff = INDEFR
nalloc = 0
nwaves = 0
while (fscan (fd) != EOF) {
# Check for comments and parameters.
call gargwrd (Memc[str], SZ_LINE)
if (nscan() != 1)
next
if (Memc[str] == '#') {
call gargwrd (Memc[str], SZ_LINE)
call strlwr (Memc[str])
if (streq (Memc[str], "type")) {
call gargwrd (Memc[str], SZ_LINE)
type = strdic (Memc[str], Memc[str], SZ_LINE, STD_TYPES)
} else if (streq (Memc[str], "units"))
call gargwrd (Memc[units], SZ_LINE)
else if (streq (Memc[str], "band"))
call gargwrd (Memc[band], SZ_LINE)
else if (streq (Memc[str], "weff"))
call gargr (weff)
next
}
call reset_scan ()
# Read data.
call gargr (wave)
call gargr (mag)
call gargr (dwave)
if (nscan() != 3)
next
if (nalloc == 0) {
nalloc = nalloc + NALLOC
call malloc (waves, nalloc, TY_REAL)
call malloc (mags, nalloc, TY_REAL)
call malloc (dwaves, nalloc, TY_REAL)
} else if (nwaves == nalloc) {
nalloc = nalloc + NALLOC
call realloc (waves, nalloc, TY_REAL)
call realloc (mags, nalloc, TY_REAL)
call realloc (dwaves, nalloc, TY_REAL)
}
Memr[waves+nwaves] = wave
Memr[mags+nwaves] = mag
Memr[dwaves+nwaves] = dwave
nwaves = nwaves + 1
}
call close (fd)
if (nwaves == 0)
call error (1, "No calibration data found")
call realloc (waves, nwaves, TY_REAL)
call realloc (mags, nwaves, TY_REAL)
call realloc (dwaves, nwaves, TY_REAL)
# This routine returns wavelengths in Angstroms.
un = un_open (Memc[units])
unang = un_open ("Angstroms")
call un_ctranr (un, unang, weff, weff, 1)
do i = 1, nwaves {
wave = Memr[waves+i-1]
dwave = Memr[dwaves+i-1]
wave1 = wave - dwave / 2
wave2 = wave + dwave / 2
call un_ctranr (un, unang, wave1, wave1, 1)
call un_ctranr (un, unang, wave2, wave2, 1)
wave = (wave1 + wave2) / 2.
dwave = abs (wave1 - wave2)
Memr[waves+i-1] = wave
Memr[dwaves+i-1] = dwave
}
call un_close (un)
call un_close (unang)
switch (type) {
case UNKNOWN:
call freecalib (waves, dwaves, mags)
call error (1, "Unknown calibration type")
case BLACKBODY:
call getbbcal (Memr[waves], Memr[mags], nwaves, Memc[band],
weff, Memc[dir])
}
call sfree (sp)
end
# GETBBCAL -- Get blackbody calibration data.
procedure getbbcal (waves, mags, nwaves, band, weff, caldir)
real waves[nwaves] #I Calibration wavelengths
real mags[nwaves] #I Calibration magnitudes
int nwaves #I Number of calibration points
char band[ARB] #I Bandpass of data
real weff #I Effective wavelength
char caldir[ARB] #I Calibration directory
int i, j, col1, col2, fd
real mag, m1, m2, dm, teff, t, dt
pointer sp, bands, magband, sptype, default, fname, str
bool streq(), strne()
int clgwrd(), nowhite(), ctor(), strdic(), strncmp()
int open(), fscan(), nscan()
real clgetr()
errchk open
begin
if (band [1] == EOS || IS_INDEFR(weff))
call error (1,
"Blackbody calibration file has no band or effective wavelength")
call smark (sp)
call salloc (bands, SZ_LINE, TY_CHAR)
call salloc (magband, SZ_LINE, TY_CHAR)
call salloc (sptype, SZ_LINE, TY_CHAR)
call salloc (default, SZ_LINE, TY_CHAR)
call salloc (fname, SZ_FNAME, TY_CHAR)
call salloc (str, SZ_LINE, TY_CHAR)
# Create list of acceptable magnitudes.
call sprintf (Memc[bands], SZ_LINE, "|")
call sprintf (Memc[fname], SZ_FNAME, "%sparams.dat")
call pargstr (caldir)
ifnoerr (fd = open (Memc[fname], READ_ONLY, TEXT_FILE)) {
while (fscan (fd) != EOF) {
call gargwrd (Memc[str], SZ_LINE)
if (Memc[str] != '#')
next
call gargwrd (Memc[str], SZ_LINE)
if (strne (Memc[str], "Type"))
next
call gargwrd (Memc[str], SZ_LINE)
j = nscan()
repeat {
i = j
call gargwrd (Memc[str], SZ_LINE)
j = nscan()
if (i == j)
break
call strcat (Memc[str], Memc[bands], SZ_LINE)
call strcat ("|", Memc[bands], SZ_LINE)
}
break
}
call close (fd)
}
col1 = strdic (band, Memc[str], SZ_LINE, Memc[bands]) + 2
if (col1 == 2) {
call strcat (band, Memc[bands], SZ_LINE)
call strcat ("|", Memc[bands], SZ_LINE)
}
col1 = strdic (band, Memc[str], SZ_LINE, Memc[bands]) + 2
call clpstr ("magband.p_min", Memc[bands])
# Get blackbody parameters.
mag = clgetr ("mag")
col2 = clgwrd ("magband", Memc[magband], SZ_LINE, Memc[bands]) + 2
call clgstr ("teff", Memc[sptype], SZ_LINE)
i = nowhite (Memc[sptype], Memc[sptype], SZ_LINE)
# Convert spectral type to effective temperature.
i = 1
if (ctor (Memc[sptype], i, teff) == 0) {
teff = INDEFR
call sprintf (Memc[fname], SZ_FNAME, "%sparams.dat")
call pargstr (caldir)
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
while (fscan (fd) != EOF) {
call gargwrd (Memc[str], SZ_FNAME)
if (strncmp (Memc[str], Memc[sptype], 2) != 0)
next
call gargr (t)
if (nscan() < 2)
next
call strcpy (Memc[str], Memc[default], SZ_LINE)
teff = t
if (streq (Memc[default], Memc[sptype]))
break
}
call close (fd)
if (IS_INDEFR(teff))
call error (1, "Failed to determine effective temperature")
if (strne (Memc[default], Memc[sptype])) {
call eprintf ("WARNING: Effective temperature for %s not found")
call pargstr (Memc[sptype])
call eprintf (" - using %s\n")
call pargstr (Memc[default])
call strcpy (Memc[default], Memc[sptype], SZ_LINE)
}
} else
Memc[sptype] = EOS
# Transform the input magnitude from the input passband to the
# data passband if necessary.
if (strne (Memc[magband], band)) {
# Get spectral type if necessary.
if (Memc[sptype] == EOS) {
dt = MAX_REAL
call sprintf (Memc[fname], SZ_FNAME, "%sparams.dat")
call pargstr (caldir)
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
while (fscan (fd) != EOF) {
call gargwrd (Memc[str], SZ_FNAME)
if (Memc[str+2] != 'V')
next
call gargr (t)
if (nscan() < 2)
next
if (abs (t - teff) < dt) {
dt = abs (t - teff)
call strcpy (Memc[str], Memc[sptype], SZ_LINE)
}
}
call close (fd)
if (Memc[sptype] == EOS)
call error (1, "Failed to determine spectral type")
call eprintf ("WARNING: Assuming spectral type of %s\n")
call pargstr (Memc[sptype])
}
# Get magnitude correction.
dm = INDEFR
call sprintf (Memc[fname], SZ_FNAME, "%sparams.dat")
call pargstr (caldir)
fd = open (Memc[fname], READ_ONLY, TEXT_FILE)
while (fscan (fd) != EOF) {
call gargwrd (Memc[str], SZ_LINE)
if (strncmp (Memc[str], Memc[sptype], 2) != 0)
next
call gargr (t)
m1 = INDEFR
m2 = INDEFR
do i = 1, max (col1, col2) {
call gargr (t)
if (i == col1)
m1 = t
if (i == col2)
m2 = t
}
if (!IS_INDEFR(m1) && !IS_INDEFR(m2)) {
call strcpy (Memc[str], Memc[default], SZ_LINE)
dm = m1 - m2
if (streq (Memc[default], Memc[sptype]))
break
}
}
call close (fd)
if (IS_INDEFR(dm)) {
call sprintf (Memc[str], SZ_LINE,
"No information in %s to convert %s mag to %s mag for %s star")
call pargstr (Memc[fname])
call pargstr (Memc[magband])
call pargstr (band)
call pargstr (Memc[sptype])
call error (1, Memc[str])
}
if (strne (Memc[default], Memc[sptype])) {
call eprintf (
"WARNING: Converting %s mag to %s mag using spectral type %s\n")
call pargstr (Memc[magband])
call pargstr (band)
call pargstr (Memc[default])
}
mag = mag + dm
call eprintf ("Blackbody: %s = %.2f, %s = %.2f, Teff = %d\n")
call pargstr (Memc[magband])
call pargr (mag - dm)
call pargstr (band)
call pargr (mag)
call pargr (teff)
} else {
call eprintf ("Blackbody: %s = %.2f, Teff = %d\n")
call pargstr (band)
call pargr (mag)
call pargr (teff)
}
# Convert the calibration magnitudes to the specified magnitude and
# apply the blackbody function.
m1 = -2.5 * log10 (weff**3 * (exp(1.4387E8/(weff*teff)) - 1))
do i = 1, nwaves
mags[i] = mags[i] + mag + m1 +
2.5 * log10 (waves[i]**3 * (exp(1.4387E8/(waves[i]*teff)) - 1))
call sfree (sp)
end
# FREECALIB -- Free calibration data arrays.
procedure freecalib (waves, dwaves, mags)
pointer waves, dwaves, mags
begin
call mfree (waves, TY_REAL)
call mfree (dwaves, TY_REAL)
call mfree (mags, TY_REAL)
end
|
