struct WorldCoor *montage_getFileInfo(fitsfile *infptr, char *header[], struct imageParams *params)
{
struct WorldCoor *wcs;
int status = 0;
int i;
if(fits_get_image_wcs_keys(infptr, header, &status))
montage_printFitsError(status);
if(fits_read_key_lng(infptr, "NAXIS", ¶ms->naxis, (char *)NULL, &status))
montage_printFitsError(status);
if(fits_read_keys_lng(infptr, "NAXIS", 1, params->naxis, params->naxes, ¶ms->nfound, &status))
montage_printFitsError(status);
if(debug)
{
for(i=0; i<params->naxis; ++i)
printf("naxis%d = %ld\n", i+1, params->naxes[i]);
fflush(stdout);
}
/****************************************/
/* Initialize the WCS transform library */
/* and find the pixel location of the */
/* sky coordinate specified */
/****************************************/
wcs = wcsinit(header[0]);
params->isDSS = 0;
if(wcs->prjcode == WCS_DSS)
params->isDSS = 1;
if(wcs == (struct WorldCoor *)NULL)
{
fprintf(fstatus, "[struct stat=\"ERROR\", msg=\"Output wcsinit() failed.\"]\n");
fflush(stdout);
exit(1);
}
/* Extract the CRPIX and (equivalent) CDELT values */
/* from the WCS structure */
params->crpix[0] = wcs->xrefpix;
params->crpix[1] = wcs->yrefpix;
if(params->isDSS)
{
params->cnpix[0] = wcs->x_pixel_offset;
params->cnpix[1] = wcs->y_pixel_offset;
}
return wcs;
}
struct mExamineReturn * mExamine(char *infile, int areaMode, int hdu, int plane3, int plane4,
double ra, double dec, double radius, int locinpix, int radinpix, int debug)
{
int i, j, offscl, nullcnt;
int status, clockwise, nfound;
int npix, nnull, first;
int ixpix, iypix;
int maxi, maxj;
char *header;
char tmpstr[32768];
char proj[32];
int csys;
char csys_str[64];
char ctype1[256];
char ctype2[256];
double equinox;
long naxis;
long naxes[10];
double naxis1;
double naxis2;
double crval1;
double crval2;
double crpix1;
double crpix2;
double cdelt1;
double cdelt2;
double crota2;
double lon, lat;
double lonc, latc;
double rac, decc;
double racp, deccp;
double ra1, dec1, ra2, dec2, ra3, dec3, ra4, dec4;
double xpix, ypix, rpix, rap;
double x, y, z;
double xp, yp, zp;
double rot, beta, dtr;
double r;
double sumflux, sumflux2, sumn, mean, background, oldbackground, rms, dot;
double sigmaref, sigmamax, sigmamin;
double val, valx, valy, valra, valdec;
double min, minx, miny, minra, mindec;
double max, maxx, maxy, maxra, maxdec;
double x0, y0, z0;
double fluxMin, fluxMax, fluxRef, sigma;
struct WorldCoor *wcs;
fitsfile *fptr;
int ibegin, iend, jbegin, jend;
long fpixel[4], nelements;
double *data = (double *)NULL;
struct apPhoto *ap = (struct apPhoto *)NULL;
int nflux, maxflux;
struct mExamineReturn *returnStruct;
returnStruct = (struct mExamineReturn *)malloc(sizeof(struct mExamineReturn));
memset((void *)returnStruct, 0, sizeof(returnStruct));
returnStruct->status = 1;
strcpy(returnStruct->msg, "");
nflux = 0;
maxflux = MAXFLUX;
/************************************************/
/* Make a NaN value to use setting blank pixels */
/************************************************/
union
{
double d;
char c[8];
}
value;
double nan;
for(i=0; i<8; ++i)
value.c[i] = (char)255;
nan = value.d;
dtr = atan(1.)/45.;
/* Process basic command-line arguments */
if(debug)
{
printf("DEBUG> areaMode = %d \n", areaMode);
printf("DEBUG> infile = %s \n", infile);
printf("DEBUG> ra = %-g\n", ra);
printf("DEBUG> dec = %-g\n", dec);
printf("DEBUG> radius = %-g\n", radius);
fflush(stdout);
}
rpix = 0.;
if(areaMode == APPHOT)
ap = (struct apPhoto *)malloc(maxflux * sizeof(struct apPhoto));
/* Open the FITS file and initialize the WCS transform */
status = 0;
if(fits_open_file(&fptr, infile, READONLY, &status))
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Cannot open FITS file %s", infile);
return returnStruct;
}
if(hdu > 0)
{
status = 0;
if(fits_movabs_hdu(fptr, hdu+1, NULL, &status))
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Can't find HDU %d", hdu);
return returnStruct;
}
}
status = 0;
if(fits_get_image_wcs_keys(fptr, &header, &status))
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Cannot find WCS keys in FITS file %s", infile);
return returnStruct;
}
status = 0;
if(fits_read_key_lng(fptr, "NAXIS", &naxis, (char *)NULL, &status))
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Cannot find NAXIS keyword in FITS file %s", infile);
return returnStruct;
}
status = 0;
if(fits_read_keys_lng(fptr, "NAXIS", 1, naxis, naxes, &nfound, &status))
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Cannot find NAXIS1,2 keywords in FITS file %s", infile);
return returnStruct;
}
wcs = wcsinit(header);
if(wcs == (struct WorldCoor *)NULL)
{
if(ap) free(ap);
sprintf(returnStruct->msg, "WCS initialization failed.");
return returnStruct;
}
/* A bunch of the parameters we want are in the WCS structure */
clockwise = 0;
strcpy(ctype1, wcs->ctype[0]);
strcpy(ctype2, wcs->ctype[1]);
naxis1 = wcs->nxpix;
naxis2 = wcs->nypix;
crval1 = wcs->xref;
crval2 = wcs->yref;
crpix1 = wcs->xrefpix;
crpix2 = wcs->yrefpix;
cdelt1 = wcs->xinc;
cdelt2 = wcs->yinc;
crota2 = wcs->rot;
if((cdelt1 < 0 && cdelt2 < 0)
|| (cdelt1 > 0 && cdelt2 > 0)) clockwise = 1;
strcpy(proj, "");
if(strlen(ctype1) > 5)
strcpy (proj, ctype1+5);
/* We get the Equinox from the WCS. If not */
/* there we take the command-line value. We */
/* then infer Julian/Besselian as best we can. */
equinox = wcs->equinox;
csys = EQUJ;
strcpy(csys_str, "EQUJ");
if(strncmp(ctype1, "RA--", 4) == 0)
{
csys = EQUJ;
strcpy(csys_str, "EQUJ");
if(equinox < 1975.)
{
csys = EQUB;
strcpy(csys_str, "EQUB");
}
}
if(strncmp(ctype1, "LON-", 4) == 0)
{
csys = GAL;
strcpy(csys_str, "GAL");
}
if(strncmp(ctype1, "GLON", 4) == 0)
{
csys = GAL;
strcpy(csys_str, "GAL");
}
if(strncmp(ctype1, "ELON", 4) == 0)
{
csys = ECLJ;
strcpy(csys_str, "ECLJ");
if(equinox < 1975.)
{
csys = ECLB;
strcpy(csys_str, "ECLB");
}
}
if(debug)
{
printf("DEBUG> proj = [%s]\n", proj);
printf("DEBUG> csys = %d\n", csys);
printf("DEBUG> clockwise = %d\n", clockwise);
printf("DEBUG> ctype1 = [%s]\n", ctype1);
printf("DEBUG> ctype2 = [%s]\n", ctype2);
printf("DEBUG> equinox = %-g\n", equinox);
printf("\n");
fflush(stdout);
}
/* To get corners and rotation in EQUJ we need the */
/* locations of the center pixel and the one above it. */
pix2wcs(wcs, wcs->nxpix/2.+0.5, wcs->nypix/2.+0.5, &lonc, &latc);
convertCoordinates (csys, equinox, lonc, latc,
EQUJ, 2000., &rac, &decc, 0.);
pix2wcs(wcs, wcs->nxpix/2.+0.5, wcs->nypix/2.+1.5, &lonc, &latc);
convertCoordinates (csys, equinox, lonc, latc,
EQUJ, 2000., &racp, &deccp, 0.);
/* Use spherical trig to get the Equatorial rotation angle */
x = cos(decc*dtr) * cos(rac*dtr);
y = cos(decc*dtr) * sin(rac*dtr);
z = sin(decc*dtr);
xp = cos(deccp*dtr) * cos(racp*dtr);
yp = cos(deccp*dtr) * sin(racp*dtr);
zp = sin(deccp*dtr);
beta = acos(x*xp + y*yp + z*zp) / dtr;
rot = asin(cos(deccp*dtr) * sin((rac-racp)*dtr)/sin(beta*dtr)) / dtr;
/* And for the four corners we want them uniformly clockwise */
if(!clockwise)
{
pix2wcs(wcs, -0.5, -0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra1, &dec1, 0.);
pix2wcs(wcs, wcs->nxpix+0.5, -0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra2, &dec2, 0.);
pix2wcs(wcs, wcs->nxpix+0.5, wcs->nypix+0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra3, &dec3, 0.);
pix2wcs(wcs, -0.5, wcs->nypix+0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra4, &dec4, 0.);
}
else
{
pix2wcs(wcs, -0.5, -0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra2, &dec2, 0.);
pix2wcs(wcs, wcs->nxpix+0.5, -0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra1, &dec1, 0.);
pix2wcs(wcs, wcs->nxpix+0.5, wcs->nypix+0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra4, &dec4, 0.);
pix2wcs(wcs, -0.5, wcs->nypix+0.5, &lon, &lat);
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra3, &dec3, 0.);
}
// Treat the default region (ALL) as a circle
// containing the whole image
if(areaMode == ALL)
{
locinpix = 1;
radinpix = 1;
ra = wcs->nxpix / 2.;
dec = wcs->nypix / 2.;
radius = sqrt(wcs->nxpix*wcs->nxpix + wcs->nypix*wcs->nypix)/2.;
}
/* Get region statistics */
ixpix = 1;
iypix = 1;
if(radinpix)
{
rpix = radius;
radius = rpix * fabs(cdelt2);
}
else
rpix = radius / fabs(cdelt2);
if(locinpix)
{
xpix = ra;
ypix = dec;
pix2wcs(wcs, xpix, ypix, &lon, &lat);
if(wcs->offscl)
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Location off the image.");
return returnStruct;
}
convertCoordinates (csys, equinox, lon, lat,
EQUJ, 2000., &ra, &dec, 0);
}
else
{
convertCoordinates (EQUJ, 2000., ra, dec,
csys, equinox, &lon, &lat, 0.);
wcs2pix(wcs, lon, lat, &xpix, &ypix, &offscl);
if(offscl)
{
if(ap) free(ap);
sprintf(returnStruct->msg, "Location off the image.");
return returnStruct;
}
}
x0 = cos(ra*dtr) * cos(dec*dtr);
y0 = sin(ra*dtr) * cos(dec*dtr);
z0 = sin(dec*dtr);
ixpix = (int)(xpix+0.5);
iypix = (int)(ypix+0.5);
if(debug)
{
printf("DEBUG> Region statististics for %-g pixels around (%-g,%-g) [%d,%d] [Equatorial (%-g, %-g)\n",
rpix, xpix, ypix, ixpix, iypix, ra, dec);
fflush(stdout);
}
// Then read the data
jbegin = iypix - rpix - 1;
jend = iypix + rpix + 1;
ibegin = ixpix - rpix - 1;
iend = ixpix + rpix + 1;
if(ibegin < 1 ) ibegin = 1;
if(iend > wcs->nxpix) iend = wcs->nxpix;
nelements = iend - ibegin + 1;
if(jbegin < 1 ) jbegin = 1;
if(jend > wcs->nypix) jend = wcs->nxpix;
fpixel[0] = ibegin;
fpixel[1] = jbegin;
fpixel[2] = 1;
fpixel[3] = 1;
fpixel[2] = plane3;
fpixel[3] = plane4;
data = (double *)malloc(nelements * sizeof(double));
status = 0;
sumflux = 0.;
sumflux2 = 0.;
npix = 0;
nnull = 0;
val = 0.;
valx = 0.;
valy = 0.;
valra = 0.;
valdec = 0.;
max = 0.;
maxx = 0.;
maxy = 0.;
maxra = 0.;
maxdec = 0.;
min = 0.;
minx = 0.;
miny = 0.;
minra = 0.;
mindec = 0.;
first = 1;
if(radius > 0.)
{
if(debug)
{
printf("\nDEBUG> Location: (%.6f %.6f) -> (%d,%d)\n\n", xpix, ypix, ixpix, iypix);
printf("DEBUG> Radius: %.6f\n\n", rpix);
printf("DEBUG> i: %d to %d\n", ibegin, iend);
printf("DEBUG> j: %d to %d\n", jbegin, jend);
}
for (j=jbegin; j<=jend; ++j)
{
status = 0;
if(fits_read_pix(fptr, TDOUBLE, fpixel, nelements, &nan,
(void *)data, &nullcnt, &status))
{
++fpixel[1];
continue;
}
for(i=0; i<nelements; ++i)
{
if(mNaN(data[i]))
{
if(debug)
printf("%10s ", "NULL");
++nnull;
continue;
}
sumflux += data[i];
sumflux2 += data[i]*data[i];
++npix;
x = ibegin + i;
y = j;
pix2wcs(wcs, x, y, &lon, &lat);
convertCoordinates(csys, equinox, lon, lat, EQUJ, 2000., &ra, &dec, 0.);
xp = cos(ra*dtr) * cos(dec*dtr);
yp = sin(ra*dtr) * cos(dec*dtr);
zp = sin(dec*dtr);
dot = xp*x0 + yp*y0 + zp*z0;
if(dot > 1.)
dot = 1.;
r = acos(dot)/dtr / fabs(cdelt2);
if(debug)
{
if(r <= rpix)
printf("%10.3f ", data[i]);
else
printf("%10s ", ".");
}
if(r > rpix)
continue;
if(x == ixpix && y == iypix)
{
val = data[i];
valx = x;
valy = y;
}
if(first)
{
first = 0;
min = data[i];
minx = x;
miny = y;
max = data[i];
maxx = x;
maxy = y;
maxi = i+ibegin;
maxj = j;
}
if(data[i] > max)
{
max = data[i];
maxx = x;
maxy = y;
maxi = i+ibegin;
maxj = j;
}
if(data[i] < min)
{
min = data[i];
minx = x;
miny = y;
}
}
pix2wcs(wcs, valx, valy, &lon, &lat);
convertCoordinates(csys, equinox, lon, lat, EQUJ, 2000., &valra, &valdec, 0.);
pix2wcs(wcs, minx, miny, &lon, &lat);
convertCoordinates(csys, equinox, lon, lat, EQUJ, 2000., &minra, &mindec, 0.);
pix2wcs(wcs, maxx, maxy, &lon, &lat);
convertCoordinates(csys, equinox, lon, lat, EQUJ, 2000., &maxra, &maxdec, 0.);
if(debug)
printf("\n");
++fpixel[1];
}
mean = 0.;
rms = 0.;
sigmaref = 0.;
sigmamin = 0.;
sigmamax = 0.;
if(npix > 0)
{
mean = sumflux / npix;
rms = sqrt(sumflux2/npix - mean*mean);
sigmaref = (val - mean) / rms;
sigmamin = (min - mean) / rms;
sigmamax = (max - mean) / rms;
}
}
/* Finally, print out parameters */
strcpy(montage_json, "{");
strcpy(montage_msgstr, "");
if(areaMode == ALL || areaMode == REGION)
{
sprintf(tmpstr, "\"proj\":\"%s\",", proj); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"csys\":\"%s\",", csys_str); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"equinox\":%.1f,", equinox); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis\":%ld,", naxis); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis1\":%d,", (int)naxis1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis2\":%d,", (int)naxis2); strcat(montage_json, tmpstr);
if(naxis > 2)
{
sprintf(tmpstr, " \"naxis3\":%ld,", naxes[2]); strcat(montage_json, tmpstr);
}
if(naxis > 3)
{
sprintf(tmpstr, " \"naxis4\":%ld,", naxes[3]); strcat(montage_json, tmpstr);
}
sprintf(tmpstr, " \"crval1\":%.7f,", crval1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crval2\":%.7f,", crval2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crpix1\":%-g,", crpix1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crpix2\":%-g,", crpix2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"cdelt1\":%.7f,", cdelt1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"cdelt2\":%.7f,", cdelt2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crota2\":%.4f,", crota2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"lonc\":%.7f,", lonc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"latc\":%.7f,", latc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ximgsize\":%.6f,", fabs(naxis1*cdelt1)); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"yimgsize\":%.6f,", fabs(naxis1*cdelt2)); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"rotequ\":%.4f,", rot); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"rac\":%.7f,", rac); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"decc\":%.7f,", decc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra1\":%.7f,", ra1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec1\":%.7f,", dec1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra2\":%.7f,", ra2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec2\":%.7f,", dec2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra3\":%.7f,", ra3); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec3\":%.7f,", dec3); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra4\":%.7f,", ra4); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec4\":%.7f,", dec4); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"radius\":%.7f,", radius); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"radpix\":%.2f,", rpix); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"npixel\":%d,", npix); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"nnull\":%d,", nnull); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"aveflux\":%-g,", mean); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"rmsflux\":%-g,", rms); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"fluxref\":%-g,", val); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"sigmaref\":%-g,", sigmaref); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"xref\":%.0f,", valx); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"yref\":%.0f,", valy); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"raref\":%.7f,", valra); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"decref\":%.7f,", valdec); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"fluxmin\":%-g,", min); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"sigmamin\":%-g,", sigmamin); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"xmin\":%.0f,", minx); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ymin\":%.0f,", miny); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ramin\":%.7f,", minra); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"decmin\":%.7f,", mindec); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"fluxmax\":%-g,", max); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"sigmamax\":%-g,", sigmamax); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"xmax\":%.0f,", maxx); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ymax\":%.0f,", maxy); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ramax\":%.7f,", maxra); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"decmax\":%.7f", maxdec); strcat(montage_json, tmpstr);
sprintf(tmpstr, "proj=\"%s\",", proj); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " csys=\"%s\",", csys_str); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " equinox=%.1f,", equinox); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis=%ld,", naxis); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis1=%d,", (int)naxis1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis2=%d,", (int)naxis2); strcat(montage_msgstr, tmpstr);
if(naxis > 2)
{
sprintf(tmpstr, " naxis3=%ld,", naxes[2]); strcat(montage_msgstr, tmpstr);
}
if(naxis > 3)
{
sprintf(tmpstr, " naxis4=%ld,", naxes[3]); strcat(montage_msgstr, tmpstr);
}
sprintf(tmpstr, " crval1=%.7f,", crval1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crval2=%.7f,", crval2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crpix1=%-g,", crpix1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crpix2=%-g,", crpix2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " cdelt1=%.7f,", cdelt1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " cdelt2=%.7f,", cdelt2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crota2=%.4f,", crota2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " lonc=%.7f,", lonc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " latc=%.7f,", latc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ximgsize=%.6f,", fabs(naxis1*cdelt1)); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " yimgsize=%.6f,", fabs(naxis1*cdelt2)); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " rotequ=%.4f,", rot); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " rac=%.7f,", rac); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " decc=%.7f,", decc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra1=%.7f,", ra1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec1=%.7f,", dec1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra2=%.7f,", ra2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec2=%.7f,", dec2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra3=%.7f,", ra3); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec3=%.7f,", dec3); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra4=%.7f,", ra4); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec4=%.7f,", dec4); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " radius=%.7f,", radius); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " radpix=%.2f,", rpix); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " npixel=%d,", npix); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " nnull=%d,", nnull); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " aveflux=%-g,", mean); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " rmsflux=%-g,", rms); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " fluxref=%-g,", val); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " sigmaref=%-g,", sigmaref); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " xref=%.0f,", valx); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " yref=%.0f,", valy); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " raref=%.7f,", valra); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " decref=%.7f,", valdec); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " fluxmin=%-g,", min); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " sigmamin=%-g,", sigmamin); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " xmin=%.0f,", minx); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ymin=%.0f,", miny); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ramin=%.7f,", minra); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " decmin=%.7f,", mindec); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " fluxmax=%-g,", max); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " sigmamax=%-g,", sigmamax); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " xmax=%.0f,", maxx); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ymax=%.0f,", maxy); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ramax=%.7f,", maxra); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " decmax=%.7f", maxdec); strcat(montage_msgstr, tmpstr);
}
else if(areaMode == APPHOT)
{
// For aperture photometry mode we process the flux vs. radius data
// to get the integrated source flux.
rap = radius;
jbegin = maxj - rap - 1;
jend = maxj + rap + 1;
ibegin = maxi - rap - 1;
iend = maxi + rap + 1;
nelements = iend - ibegin + 1;
fpixel[0] = ibegin;
fpixel[1] = jbegin;
fpixel[2] = 1;
fpixel[3] = 1;
for (j=jbegin; j<=jend; ++j)
{
status = 0;
if(fits_read_pix(fptr, TDOUBLE, fpixel, nelements, &nan,
(void *)data, &nullcnt, &status))
{
if(ap) free(ap);
free(data);
sprintf(returnStruct->msg, "Error reading FITS data.");
return returnStruct;
}
for(i=0; i<nelements; ++i)
{
if(mNaN(data[i]))
continue;
r = sqrt(((double)i+ibegin-maxi)*((double)i+ibegin-maxi) + ((double)j-maxj)*((double)j-maxj));
if(r > rap)
continue;
ap[nflux].rad = r;
ap[nflux].flux = data[i];
ap[nflux].fit = 0.;
++nflux;
if(nflux >= maxflux)
{
maxflux += MAXFLUX;
ap = (struct apPhoto *)realloc(ap, maxflux * sizeof(struct apPhoto));
}
}
++fpixel[1];
}
// Sort the data by radius
qsort(ap, (size_t)nflux, sizeof(struct apPhoto), mExamine_radCompare);
// Find the peak flux and the minimum flux.
// The max is constrained to be in the first quarter of the
// data, just to be careful.
fluxMax = -1.e99;
fluxMin = 1.e99;
for(i=0; i<nflux; ++i)
{
if(i < nflux/4 && ap[i].flux > fluxMax)
fluxMax = ap[i].flux;
if(ap[i].flux < fluxMin)
fluxMin = ap[i].flux;
}
// Fit the minimum a little more carefully, iterating
// and excluding points more than 3 sigma above the
// minimum.
background = fluxMin;
sigma = fluxMax - fluxMin;
for(j=0; j<1000; ++j)
{
oldbackground = background;
sumn = 0.;
sumflux = 0.;
sumflux2 = 0.;
for(i=0; i<nflux; ++i)
{
if(fabs(ap[i].flux - background) > 3.*sigma)
continue;
sumn += 1.;
sumflux += ap[i].flux;
sumflux2 += ap[i].flux * ap[i].flux;
}
background = sumflux / sumn;
sigma = sqrt(sumflux2/sumn - background*background);
if(fabs((background - oldbackground) / oldbackground) < 1.e-3)
break;
}
fluxRef = (fluxMax-fluxMin) / exp(1.);
for(i=0; i<nflux; ++i)
{
if(ap[i].flux < fluxRef)
{
sigma = ap[i].rad;
break;
}
}
for(i=0; i<nflux; ++i)
{
ap[i].fit = (fluxMax-background) * exp(-(ap[i].rad * ap[i].rad) / (sigma * sigma)) + background;
if(i == 0)
ap[i].sum = ap[i].flux - background;
else
ap[i].sum = ap[i-1].sum + (ap[i].flux - background);
}
if(debug)
{
printf("| rad | flux | fit | sum |\n");
fflush(stdout);
for(i=0; i<nflux; ++i)
{
printf("%12.6f %12.6f %12.6f %12.6f \n", ap[i].rad, ap[i].flux, ap[i].fit, ap[i].sum);
fflush(stdout);
}
}
sprintf(tmpstr, "\"proj\":\"%s\",", proj); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"csys\":\"%s\",", csys_str); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"equinox\":%.1f,", equinox); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis\":%ld,", naxis); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis1\":%d,", (int)naxis1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"naxis2\":%d,", (int)naxis2); strcat(montage_json, tmpstr);
if(naxis > 2)
{
sprintf(tmpstr, " \"naxis3\":%ld,", naxes[2]); strcat(montage_json, tmpstr);
}
if(naxis > 3)
{
sprintf(tmpstr, " \"naxis4\":%ld,", naxes[3]); strcat(montage_json, tmpstr);
}
sprintf(tmpstr, " \"crval1\":%.7f,", crval1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crval2\":%.7f,", crval2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crpix1\":%-g,", crpix1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crpix2\":%-g,", crpix2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"cdelt1\":%.7f,", cdelt1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"cdelt2\":%.7f,", cdelt2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"crota2\":%.4f,", crota2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"lonc\":%.7f,", lonc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"latc\":%.7f,", latc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ximgsize\":%.6f,", fabs(naxis1*cdelt1)); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"yimgsize\":%.6f,", fabs(naxis1*cdelt2)); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"rotequ\":%.4f,", rot); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"rac\":%.7f,", rac); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"decc\":%.7f,", decc); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra1\":%.7f,", ra1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec1\":%.7f,", dec1); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra2\":%.7f,", ra2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec2\":%.7f,", dec2); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra3\":%.7f,", ra3); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec3\":%.7f,", dec3); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"ra4\":%.7f,", ra4); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"dec4\":%.7f,", dec4); strcat(montage_json, tmpstr);
sprintf(tmpstr, " \"totalflux\":%.7e", ap[nflux/2].sum); strcat(montage_json, tmpstr);
sprintf(tmpstr, "proj=\"%s\",", proj); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " csys=\"%s\",", csys_str); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " equinox=%.1f,", equinox); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis=%ld,", naxis); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis1=%d,", (int)naxis1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " naxis2=%d,", (int)naxis2); strcat(montage_msgstr, tmpstr);
if(naxis > 2)
{
sprintf(tmpstr, " naxis3=%ld,", naxes[2]); strcat(montage_msgstr, tmpstr);
}
if(naxis > 3)
{
sprintf(tmpstr, " naxis4=%ld,", naxes[3]); strcat(montage_msgstr, tmpstr);
}
sprintf(tmpstr, " crval1=%.7f,", crval1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crval2=%.7f,", crval2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crpix1=%-g,", crpix1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crpix2=%-g,", crpix2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " cdelt1=%.7f,", cdelt1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " cdelt2=%.7f,", cdelt2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " crota2=%.4f,", crota2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " lonc=%.7f,", lonc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " latc=%.7f,", latc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ximgsize=%.6f,", fabs(naxis1*cdelt1)); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " yimgsize=%.6f,", fabs(naxis1*cdelt2)); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " rotequ=%.4f,", rot); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " rac=%.7f,", rac); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " decc=%.7f,", decc); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra1=%.7f,", ra1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec1=%.7f,", dec1); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra2=%.7f,", ra2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec2=%.7f,", dec2); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra3=%.7f,", ra3); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec3=%.7f,", dec3); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " ra4=%.7f,", ra4); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " dec4=%.7f,", dec4); strcat(montage_msgstr, tmpstr);
sprintf(tmpstr, " totalflux=%.7e", ap[nflux/2].sum); strcat(montage_msgstr, tmpstr);
}
strcat(montage_json, "}");
if(ap) free(ap);
free(data);
returnStruct->status = 0;
strcpy(returnStruct->msg, montage_msgstr);
strcpy(returnStruct->json, montage_json);
strcpy(returnStruct->proj, proj);
strcpy(returnStruct->csys, csys_str);
returnStruct->equinox = equinox;
returnStruct->naxis = naxis;
returnStruct->naxis1 = naxis1;
returnStruct->naxis2 = naxis2;
returnStruct->naxis3 = naxes[2];
returnStruct->naxis4 = naxes[3];
returnStruct->crval1 = crval1;
returnStruct->crval2 = crval2;
returnStruct->crpix1 = crpix1;
returnStruct->crpix2 = crpix2;
returnStruct->cdelt1 = cdelt1;
returnStruct->cdelt2 = cdelt2;
returnStruct->crota2 = crota2;
returnStruct->lonc = lonc;
returnStruct->latc = latc;
returnStruct->ximgsize = fabs(naxis1*cdelt1);
returnStruct->yimgsize = fabs(naxis2*cdelt2);
returnStruct->rotequ = rot;
returnStruct->rac = rac;
returnStruct->decc = decc;
returnStruct->ra1 = ra1;
returnStruct->dec1 = dec1;
returnStruct->ra2 = ra2;
returnStruct->dec2 = dec2;
returnStruct->ra3 = ra3;
returnStruct->dec3 = dec3;
returnStruct->ra4 = ra4;
returnStruct->dec4 = dec4;
returnStruct->radius = radius;
returnStruct->radpix = rpix;
returnStruct->npixel = npix;
returnStruct->nnull = nnull;
returnStruct->aveflux = mean;
returnStruct->rmsflux = rms;
returnStruct->fluxref = val;
returnStruct->sigmaref = sigmaref;
returnStruct->xref = valx;
returnStruct->yref = valy;
returnStruct->raref = valra;
returnStruct->decref = valdec;
returnStruct->fluxmin = min;
returnStruct->sigmamin = sigmamin;
returnStruct->xmin = minx;
returnStruct->ymin = miny;
returnStruct->ramin = minra;
returnStruct->decmin = mindec;
returnStruct->fluxmax = max;
returnStruct->sigmamax = sigmamax;
returnStruct->xmax = maxx;
returnStruct->ymax = maxy;
returnStruct->ramax = maxra;
returnStruct->decmax = maxdec;
if(areaMode == APPHOT)
returnStruct->totalflux = ap[nflux/2].sum;
else
returnStruct->totalflux = 0.;
return returnStruct;
}
int readFits(char *filename, struct FitsFile *input)
{
int status=0;
char errstr[MAXSTR];
int sys;
double epoch;
char *input_header;
int hdu=0;
double offset=0;
/*****************************************/
/* Open the FITS file and get the header */
/* for WCS setup */
/*****************************************/
if(fits_open_file(&input->fptr, filename, READONLY, &status))
{
sprintf(errstr, "Image file %s missing or invalid FITS", filename);
printError(errstr);
}
if(hdu > 0)
{
if(fits_movabs_hdu(input->fptr, hdu+1, NULL, &status))
printFitsError(status);
}
if(fits_get_image_wcs_keys(input->fptr, &input_header, &status))
printFitsError(status);
/************************/
/* Open the weight file */
/************************/
/*
if(haveWeights)
{
if(fits_open_file(&weight.fptr, weightfile, READONLY, &status))
{
sprintf(errstr, "Weight file %s missing or invalid FITS", weightfile);
printError(errstr);
}
if(hdu > 0)
{
if(fits_movabs_hdu(weight.fptr, hdu+1, NULL, &status))
printFitsError(status);
}
}
*/
/****************************************/
/* Initialize the WCS transform library */
/****************************************/
if(debug >= 3)
{
printf("Input header to wcsinit() [input.wcs]:\n%s\n", input_header);
fflush(stdout);
}
input->wcs = wcsinit(input_header);
if(input->wcs == (struct WorldCoor *)NULL)
{
fprintf(fstatus, "[struct stat=\"ERROR\", msg=\"Input wcsinit() failed.\"]\n");
exit(1);
}
input->wcs->nxpix += 2 * offset;
input->wcs->nypix += 2 * offset;
input->wcs->xrefpix += offset;
input->wcs->yrefpix += offset;
input->naxes[0] = input->wcs->nxpix;
input->naxes[1] = input->wcs->nypix;
/***************************************************/
/* Determine whether these pixels are 'clockwise' */
/* or 'counterclockwise' */
/***************************************************/
input->clockwise = 0;
if((input->wcs->xinc < 0 && input->wcs->yinc < 0)
|| (input->wcs->xinc > 0 && input->wcs->yinc > 0)) input->clockwise = 1;
if(debug >= 3)
{
if(input->clockwise)
printf("Input pixels are clockwise.\n");
else
printf("Input pixels are counterclockwise.\n");
}
/*************************************/
/* Set up the coordinate transform */
/*************************************/
if (input->wcs->syswcs == WCS_J2000)
{
sys = EQUJ;
epoch = 2000.;
if(input->wcs->equinox == 1950.)
epoch = 1950;
}
else if(input->wcs->syswcs == WCS_B1950)
{
sys = EQUB;
epoch = 1950.;
if(input->wcs->equinox == 2000.)
epoch = 2000;
}
else if(input->wcs->syswcs == WCS_GALACTIC)
{
sys = GAL;
epoch = 2000.;
}
else if(input->wcs->syswcs == WCS_ECLIPTIC)
{
sys = ECLJ;
epoch = 2000.;
if(input->wcs->equinox == 1950.)
{
sys = ECLB;
epoch = 1950.;
}
}
else
{
sys = EQUJ;
epoch = 2000.;
}
input->sys = sys;
input->epoch = epoch;
return 0;
}
