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e_unlens.c
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Sun, Dec 29, 10:01

e_unlens.c
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#include<stdio.h>
#include<string.h>
#include<math.h>
#include<fonction.h>
#include<constant.h>
#include<dimension.h>
#include<structure.h>
/****************************************************************/
/* nom: e_unlens */
/* auteur: Jean-Paul Kneib */
/* date: 10/02/92 */
/* place: Toulouse */
/****************************************************************
* Return a catalog of sources from a catalog of arclets for the
* s_source() function.
*/
void e_unlens( long int na,
struct galaxie *arclet,
long int *ns,
struct galaxie *source )
{
// const extern struct g_source S;
// const extern struct g_image I;
// const extern struct pot lens[];
// const extern struct galaxie multi[NFMAX][NIMAX];
struct ellipse ampli;
long int i; //, j;
// for each arclet
for ( i = 0 ; i < na ; i++ )
{
// assign a redshift to each arclet
// if (arclet[i].z == 0.)
// {
// // look for the multi that corresponds to this arclet
// for ( j = 0; j < I.n_mult && indexCmp( multi[j][0].n, arclet[i].n ); j++);
// if ( j < I.n_mult )
// arclet[i].z = multi[j][0].z;
// else
// arclet[i].z = S.zs;
// }
// Compute its DLS/DS ratio
// arclet[i].dr = dratio(lens[0].z, arclet[i].z);
source[i+(*ns)].c = arclet[i].c; // point like of extended image?
ampli = e_unmag_gal(&arclet[i]);
// if point like image then source shape parameters = 0
if (arclet[i].c == 's')
source[i+(*ns)].E.a =
source[i+(*ns)].E.b =
source[i+(*ns)].E.theta = 0.;
else
{
// else compute source shape parameters through amplification
if (arclet[i].E.b != 0.)
isoima(&arclet[i].E, &ampli, &source[i+(*ns)].E);
else
{
source[i+(*ns)].E.a =
source[i+(*ns)].E.b =
arclet[i].E.a * fabs(ampli.a * ampli.b);
source[i+(*ns)].E.theta = 0.;
}
}
// compute source position
e_dpl(&arclet[i].C, arclet[i].dr, &source[i+(*ns)].C);
// ... name
strcpy(source[i+(*ns)].n, arclet[i].n);
// ... redshift
source[i+(*ns)].z = arclet[i].z;
// ... magnitude
source[i+(*ns)].mag = arclet[i].mag - 2.5 * log10(fabs(ampli.a * ampli.b));
// ... DLS/DS ratio
source[i+(*ns)].dl0s = arclet[i].dl0s;
source[i+(*ns)].dos = arclet[i].dos;
source[i+(*ns)].dr = arclet[i].dr;
// ... intensity
source[i+(*ns)].I0 = arclet[i].I0;
}
(*ns) += na;
}

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