FORS Pipeline Reference Manual 4.9.9
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00001 /* $Id: fors_wave_calib.c,v 1.5 2010/09/14 07:38:16 cizzo Exp $ 00002 * 00003 * This file is part of the FORS Data Reduction Pipeline 00004 * Copyright (C) 2002-2010 European Southern Observatory 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this program; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00021 /* 00022 * $Author: cizzo $ 00023 * $Date: 2010/09/14 07:38:16 $ 00024 * $Revision: 1.5 $ 00025 * $Name: fors-4_9_9 $ 00026 */ 00027 00028 #ifdef HAVE_CONFIG_H 00029 #include <config.h> 00030 #endif 00031 00032 #include <math.h> 00033 #include <cpl.h> 00034 #include <moses.h> 00035 #include <fors_dfs.h> 00036 00037 static int fors_wave_calib_create(cpl_plugin *); 00038 static int fors_wave_calib_exec(cpl_plugin *); 00039 static int fors_wave_calib_destroy(cpl_plugin *); 00040 static int fors_wave_calib(cpl_parameterlist *, cpl_frameset *); 00041 00042 static char fors_wave_calib_description[] = 00043 "This recipe is used to wavelength calibrate MOS/MXU slit spectra contained\n" 00044 "in the rectified arc lamp exposure produced with recipe fors_extract_slits.\n" 00045 "A pattern-matching algorithm is applied as in recipe fors_detect_spectra.\n" 00046 "The input spatial map is used in the production of the wavelength map.\n" 00047 "\n" 00048 "Use recipe fors_wave_calib_lss for LSS data, or for MOS/MXU data where all\n" 00049 "slits have the same offset. For more details on this data reduction strategy\n" 00050 "please refer to the FORS Pipeline User's Manual.\n" 00051 "\n" 00052 "Note that specifying an input GRISM_TABLE will set some of the recipe\n" 00053 "configuration parameters to default values valid for a particular grism.\n" 00054 "\n" 00055 "In the table below the MXU acronym can be alternatively read as MOS.\n\n" 00056 "Input files:\n\n" 00057 " DO category: Type: Explanation: Required:\n" 00058 " SPATIAL_MAP_MXU Calib Spatial map Y\n" 00059 " RECTIFIED_LAMP_MXU Calib Rectified arc exposure Y\n" 00060 " SLIT_LOCATION_MXU Calib Slit location table Y\n" 00061 " CURV_COEFF_MXU Calib Spectral curvature Y\n" 00062 " MASTER_LINECAT Calib Line catalog Y\n" 00063 " GRISM_TABLE Calib Grism table .\n\n" 00064 "Output files:\n\n" 00065 " DO category: Data type: Explanation:\n" 00066 " REDUCED_LAMP_MXU FITS image Calibrated arc lamp exposure\n" 00067 " DISP_COEFF_MXU FITS table Inverse dispersion coefficients\n" 00068 " DISP_RESIDUALS_MXU FITS image Image of modeling residuals\n" 00069 " WAVELENGTH_MAP_MXU FITS image Wavelengths mapped on CCD\n" 00070 " SPECTRAL_RESOLUTION_MXU FITS table Spectral resolution table\n\n"; 00071 00072 #define fors_wave_calib_exit(message) \ 00073 { \ 00074 if (message) cpl_msg_error(recipe, message); \ 00075 cpl_image_delete(spectra); \ 00076 cpl_image_delete(spatial); \ 00077 cpl_image_delete(rainbow); \ 00078 cpl_image_delete(residual); \ 00079 cpl_image_delete(rectified); \ 00080 cpl_image_delete(wavemap); \ 00081 cpl_table_delete(grism_table); \ 00082 cpl_table_delete(wavelengths); \ 00083 cpl_table_delete(maskslits); \ 00084 cpl_table_delete(idscoeff); \ 00085 cpl_table_delete(restab); \ 00086 cpl_table_delete(slits); \ 00087 cpl_table_delete(polytraces); \ 00088 cpl_vector_delete(lines); \ 00089 cpl_propertylist_delete(header); \ 00090 cpl_propertylist_delete(save_header); \ 00091 cpl_msg_indent_less(); \ 00092 return -1; \ 00093 } 00094 00095 #define fors_wave_calib_exit_memcheck(message) \ 00096 { \ 00097 if (message) cpl_msg_info(recipe, message); \ 00098 printf("free spectra (%p)\n", spectra); \ 00099 cpl_image_delete(spectra); \ 00100 printf("free spatial (%p)\n", spatial); \ 00101 cpl_image_delete(spatial); \ 00102 printf("free rainbow (%p)\n", rainbow); \ 00103 cpl_image_delete(rainbow); \ 00104 printf("free residual (%p)\n", residual); \ 00105 cpl_image_delete(residual); \ 00106 printf("free rectified (%p)\n", rectified); \ 00107 cpl_image_delete(rectified); \ 00108 printf("free wavemap (%p)\n", wavemap); \ 00109 cpl_image_delete(wavemap); \ 00110 printf("free grism_table (%p)\n", grism_table); \ 00111 cpl_table_delete(grism_table); \ 00112 printf("free wavelengths (%p)\n", wavelengths); \ 00113 cpl_table_delete(wavelengths); \ 00114 printf("free maskslits (%p)\n", maskslits); \ 00115 cpl_table_delete(maskslits); \ 00116 printf("free idscoeff (%p)\n", idscoeff); \ 00117 cpl_table_delete(idscoeff); \ 00118 printf("free restab (%p)\n", restab); \ 00119 cpl_table_delete(restab); \ 00120 printf("free slits (%p)\n", slits); \ 00121 cpl_table_delete(slits); \ 00122 printf("free polytraces (%p)\n", polytraces); \ 00123 cpl_table_delete(polytraces); \ 00124 printf("free lines (%p)\n", lines); \ 00125 cpl_vector_delete(lines); \ 00126 printf("free header (%p)\n", header); \ 00127 cpl_propertylist_delete(header); \ 00128 printf("free save_header (%p)\n", save_header); \ 00129 cpl_propertylist_delete(save_header); \ 00130 cpl_msg_indent_less(); \ 00131 return 0; \ 00132 } 00133 00134 00146 int cpl_plugin_get_info(cpl_pluginlist *list) 00147 { 00148 cpl_recipe *recipe = cpl_calloc(1, sizeof *recipe ); 00149 cpl_plugin *plugin = &recipe->interface; 00150 00151 cpl_plugin_init(plugin, 00152 CPL_PLUGIN_API, 00153 FORS_BINARY_VERSION, 00154 CPL_PLUGIN_TYPE_RECIPE, 00155 "fors_wave_calib", 00156 "Derive dispersion relation from rectified arc lamp frame", 00157 fors_wave_calib_description, 00158 "Carlo Izzo", 00159 PACKAGE_BUGREPORT, 00160 "This file is currently part of the FORS Instrument Pipeline\n" 00161 "Copyright (C) 2002-2010 European Southern Observatory\n\n" 00162 "This program is free software; you can redistribute it and/or modify\n" 00163 "it under the terms of the GNU General Public License as published by\n" 00164 "the Free Software Foundation; either version 2 of the License, or\n" 00165 "(at your option) any later version.\n\n" 00166 "This program is distributed in the hope that it will be useful,\n" 00167 "but WITHOUT ANY WARRANTY; without even the implied warranty of\n" 00168 "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n" 00169 "GNU General Public License for more details.\n\n" 00170 "You should have received a copy of the GNU General Public License\n" 00171 "along with this program; if not, write to the Free Software Foundation,\n" 00172 "Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA\n", 00173 fors_wave_calib_create, 00174 fors_wave_calib_exec, 00175 fors_wave_calib_destroy); 00176 00177 cpl_pluginlist_append(list, plugin); 00178 00179 return 0; 00180 } 00181 00182 00193 static int fors_wave_calib_create(cpl_plugin *plugin) 00194 { 00195 cpl_recipe *recipe; 00196 cpl_parameter *p; 00197 00198 /* 00199 * Check that the plugin is part of a valid recipe 00200 */ 00201 00202 if (cpl_plugin_get_type(plugin) == CPL_PLUGIN_TYPE_RECIPE) 00203 recipe = (cpl_recipe *)plugin; 00204 else 00205 return -1; 00206 00207 /* 00208 * Create the (empty) parameters list in the cpl_recipe object 00209 */ 00210 00211 recipe->parameters = cpl_parameterlist_new(); 00212 00213 /* 00214 * Dispersion 00215 */ 00216 00217 p = cpl_parameter_new_value("fors.fors_wave_calib.dispersion", 00218 CPL_TYPE_DOUBLE, 00219 "Expected spectral dispersion (Angstrom/pixel)", 00220 "fors.fors_wave_calib", 00221 0.0); 00222 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "dispersion"); 00223 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00224 cpl_parameterlist_append(recipe->parameters, p); 00225 00226 /* 00227 * Peak detection level 00228 */ 00229 00230 p = cpl_parameter_new_value("fors.fors_wave_calib.peakdetection", 00231 CPL_TYPE_DOUBLE, 00232 "Initial peak detection threshold (ADU)", 00233 "fors.fors_wave_calib", 00234 0.0); 00235 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "peakdetection"); 00236 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00237 cpl_parameterlist_append(recipe->parameters, p); 00238 00239 /* 00240 * Degree of wavelength calibration polynomial 00241 */ 00242 00243 p = cpl_parameter_new_value("fors.fors_wave_calib.wdegree", 00244 CPL_TYPE_INT, 00245 "Degree of wavelength calibration polynomial", 00246 "fors.fors_wave_calib", 00247 0); 00248 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "wdegree"); 00249 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00250 cpl_parameterlist_append(recipe->parameters, p); 00251 00252 /* 00253 * Reference lines search radius 00254 */ 00255 00256 p = cpl_parameter_new_value("fors.fors_wave_calib.wradius", 00257 CPL_TYPE_INT, 00258 "Search radius if iterating pattern-matching " 00259 "with first-guess method", 00260 "fors.fors_wave_calib", 00261 4); 00262 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "wradius"); 00263 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00264 cpl_parameterlist_append(recipe->parameters, p); 00265 00266 /* 00267 * Rejection threshold in dispersion relation polynomial fitting 00268 */ 00269 00270 p = cpl_parameter_new_value("fors.fors_wave_calib.wreject", 00271 CPL_TYPE_DOUBLE, 00272 "Rejection threshold in dispersion " 00273 "relation fit (pixel)", 00274 "fors.fors_wave_calib", 00275 0.7); 00276 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "wreject"); 00277 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00278 cpl_parameterlist_append(recipe->parameters, p); 00279 00280 /* 00281 * Line catalog table column containing the reference wavelengths 00282 */ 00283 00284 p = cpl_parameter_new_value("fors.fors_wave_calib.wcolumn", 00285 CPL_TYPE_STRING, 00286 "Name of line catalog table column " 00287 "with wavelengths", 00288 "fors.fors_wave_calib", 00289 "WLEN"); 00290 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "wcolumn"); 00291 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00292 cpl_parameterlist_append(recipe->parameters, p); 00293 00294 /* 00295 * Start wavelength for spectral extraction 00296 */ 00297 00298 p = cpl_parameter_new_value("fors.fors_wave_calib.startwavelength", 00299 CPL_TYPE_DOUBLE, 00300 "Start wavelength in spectral extraction", 00301 "fors.fors_wave_calib", 00302 0.0); 00303 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "startwavelength"); 00304 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00305 cpl_parameterlist_append(recipe->parameters, p); 00306 00307 /* 00308 * End wavelength for spectral extraction 00309 */ 00310 00311 p = cpl_parameter_new_value("fors.fors_wave_calib.endwavelength", 00312 CPL_TYPE_DOUBLE, 00313 "End wavelength in spectral extraction", 00314 "fors.fors_wave_calib", 00315 0.0); 00316 cpl_parameter_set_alias(p, CPL_PARAMETER_MODE_CLI, "endwavelength"); 00317 cpl_parameter_disable(p, CPL_PARAMETER_MODE_ENV); 00318 cpl_parameterlist_append(recipe->parameters, p); 00319 00320 return 0; 00321 } 00322 00323 00332 static int fors_wave_calib_exec(cpl_plugin *plugin) 00333 { 00334 cpl_recipe *recipe; 00335 00336 if (cpl_plugin_get_type(plugin) == CPL_PLUGIN_TYPE_RECIPE) 00337 recipe = (cpl_recipe *)plugin; 00338 else 00339 return -1; 00340 00341 return fors_wave_calib(recipe->parameters, recipe->frames); 00342 } 00343 00344 00353 static int fors_wave_calib_destroy(cpl_plugin *plugin) 00354 { 00355 cpl_recipe *recipe; 00356 00357 if (cpl_plugin_get_type(plugin) == CPL_PLUGIN_TYPE_RECIPE) 00358 recipe = (cpl_recipe *)plugin; 00359 else 00360 return -1; 00361 00362 cpl_parameterlist_delete(recipe->parameters); 00363 00364 return 0; 00365 } 00366 00367 00377 static int fors_wave_calib(cpl_parameterlist *parlist, 00378 cpl_frameset *frameset) 00379 { 00380 00381 const char *recipe = "fors_wave_calib"; 00382 00383 00384 /* 00385 * Input parameters 00386 */ 00387 00388 double dispersion; 00389 double peakdetection; 00390 int wdegree; 00391 int wradius; 00392 double wreject; 00393 const char *wcolumn; 00394 double startwavelength; 00395 double endwavelength; 00396 00397 /* 00398 * CPL objects 00399 */ 00400 00401 cpl_image *spectra = NULL; 00402 cpl_image *spatial = NULL; 00403 cpl_image *rectified = NULL; 00404 cpl_image *wavemap = NULL; 00405 cpl_image *rainbow = NULL; 00406 cpl_image *residual = NULL; 00407 cpl_image *bimage = NULL; 00408 cpl_table *grism_table = NULL; 00409 cpl_table *wavelengths = NULL; 00410 cpl_table *slits = NULL; 00411 cpl_table *polytraces = NULL; 00412 cpl_table *idscoeff = NULL; 00413 cpl_table *maskslits = NULL; 00414 cpl_table *restab = NULL; 00415 cpl_vector *lines = NULL; 00416 cpl_propertylist *header = NULL; 00417 cpl_propertylist *save_header = NULL; 00418 00419 /* 00420 * Auxiliary variables 00421 */ 00422 00423 char version[80]; 00424 const char *arc_tag; 00425 const char *reduced_lamp_tag; 00426 const char *wavelength_map_tag; 00427 const char *spatial_map_tag; 00428 const char *disp_residuals_tag; 00429 const char *disp_coeff_tag; 00430 const char *curv_coeff_tag; 00431 const char *slit_location_tag; 00432 const char *spectral_resolution_tag; 00433 int lamp_mxu; 00434 int lamp_mos; 00435 int mxu, mos; 00436 int treat_as_lss = 0; 00437 int nslits; 00438 double mean_rms; 00439 double *xpos; 00440 double mxpos; 00441 int narc, nref; 00442 int nlines; 00443 int rebin; 00444 double *line; 00445 double *fiterror = NULL; 00446 int *fitlines = NULL; 00447 int nx, ny; 00448 double reference; 00449 int i; 00450 00451 char *instrume = NULL; 00452 00453 00454 cpl_msg_set_indentation(2); 00455 00456 if (dfs_files_dont_exist(frameset)) 00457 fors_wave_calib_exit(NULL); 00458 00459 00460 /* 00461 * Get configuration parameters 00462 */ 00463 00464 cpl_msg_info(recipe, "Recipe %s configuration parameters:", recipe); 00465 cpl_msg_indent_more(); 00466 00467 if (cpl_frameset_count_tags(frameset, "GRISM_TABLE") > 1) 00468 fors_wave_calib_exit("Too many in input: GRISM_TABLE"); 00469 00470 grism_table = dfs_load_table(frameset, "GRISM_TABLE", 1); 00471 00472 dispersion = dfs_get_parameter_double(parlist, 00473 "fors.fors_wave_calib.dispersion", grism_table); 00474 00475 if (dispersion <= 0.0) 00476 fors_wave_calib_exit("Invalid spectral dispersion value"); 00477 00478 peakdetection = dfs_get_parameter_double(parlist, 00479 "fors.fors_wave_calib.peakdetection", grism_table); 00480 if (peakdetection <= 0.0) 00481 fors_wave_calib_exit("Invalid peak detection level"); 00482 00483 wdegree = dfs_get_parameter_int(parlist, 00484 "fors.fors_wave_calib.wdegree", grism_table); 00485 00486 if (wdegree < 1) 00487 fors_wave_calib_exit("Invalid polynomial degree"); 00488 00489 if (wdegree > 5) 00490 fors_wave_calib_exit("Max allowed polynomial degree is 5"); 00491 00492 wradius = dfs_get_parameter_int(parlist, 00493 "fors.fors_wave_calib.wradius", NULL); 00494 00495 if (wradius < 0) 00496 fors_wave_calib_exit("Invalid search radius"); 00497 00498 wreject = dfs_get_parameter_double(parlist, 00499 "fors.fors_wave_calib.wreject", NULL); 00500 00501 if (wreject <= 0.0) 00502 fors_wave_calib_exit("Invalid rejection threshold"); 00503 00504 wcolumn = dfs_get_parameter_string(parlist, 00505 "fors.fors_wave_calib.wcolumn", NULL); 00506 00507 startwavelength = dfs_get_parameter_double(parlist, 00508 "fors.fors_wave_calib.startwavelength", grism_table); 00509 if (startwavelength > 1.0) 00510 if (startwavelength < 3000.0 || startwavelength > 13000.0) 00511 fors_wave_calib_exit("Invalid wavelength"); 00512 00513 endwavelength = dfs_get_parameter_double(parlist, 00514 "fors.fors_wave_calib.endwavelength", grism_table); 00515 if (endwavelength > 1.0) { 00516 if (endwavelength < 3000.0 || endwavelength > 13000.0) 00517 fors_wave_calib_exit("Invalid wavelength"); 00518 if (startwavelength < 1.0) 00519 fors_wave_calib_exit("Invalid wavelength interval"); 00520 } 00521 00522 if (startwavelength > 1.0) 00523 if (endwavelength - startwavelength <= 0.0) 00524 fors_wave_calib_exit("Invalid wavelength interval"); 00525 00526 cpl_table_delete(grism_table); grism_table = NULL; 00527 00528 if (cpl_error_get_code()) 00529 fors_wave_calib_exit("Failure reading the configuration parameters"); 00530 00531 00532 cpl_msg_indent_less(); 00533 cpl_msg_info(recipe, "Check input set-of-frames:"); 00534 cpl_msg_indent_more(); 00535 00536 if (cpl_frameset_count_tags(frameset, "MASTER_LINECAT") == 0) 00537 fors_wave_calib_exit("Missing required input: MASTER_LINECAT"); 00538 00539 if (cpl_frameset_count_tags(frameset, "MASTER_LINECAT") > 1) 00540 fors_wave_calib_exit("Too many in input: MASTER_LINECAT"); 00541 00542 lamp_mxu = cpl_frameset_count_tags(frameset, "RECTIFIED_LAMP_MXU"); 00543 lamp_mos = cpl_frameset_count_tags(frameset, "RECTIFIED_LAMP_MOS"); 00544 00545 narc = lamp_mxu + lamp_mos; 00546 00547 if (narc == 0) { 00548 fors_wave_calib_exit("Missing input rectified arc lamp frame"); 00549 } 00550 if (narc > 1) { 00551 cpl_msg_error(recipe, "Too many input rectified arc lamp frames " 00552 "(%d > 1)", narc); 00553 fors_wave_calib_exit(NULL); 00554 } 00555 00556 mxu = mos = 0; 00557 00558 if (lamp_mxu) { 00559 mxu = 1; 00560 arc_tag = "RECTIFIED_LAMP_MXU"; 00561 slit_location_tag = "SLIT_LOCATION_MXU"; 00562 spatial_map_tag = "SPATIAL_MAP_MXU"; 00563 reduced_lamp_tag = "REDUCED_LAMP_MXU"; 00564 disp_residuals_tag = "DISP_RESIDUALS_MXU"; 00565 disp_coeff_tag = "DISP_COEFF_MXU"; 00566 curv_coeff_tag = "CURV_COEFF_MXU"; 00567 wavelength_map_tag = "WAVELENGTH_MAP_MXU"; 00568 spectral_resolution_tag = "SPECTRAL_RESOLUTION_MXU"; 00569 } 00570 else if (lamp_mos) { 00571 mos = 1; 00572 arc_tag = "RECTIFIED_LAMP_MOS"; 00573 slit_location_tag = "SLIT_LOCATION_MOS"; 00574 spatial_map_tag = "SPATIAL_MAP_MOS"; 00575 reduced_lamp_tag = "REDUCED_LAMP_MOS"; 00576 disp_residuals_tag = "DISP_RESIDUALS_MOS"; 00577 disp_coeff_tag = "DISP_COEFF_MOS"; 00578 curv_coeff_tag = "CURV_COEFF_MXU"; 00579 wavelength_map_tag = "WAVELENGTH_MAP_MOS"; 00580 spectral_resolution_tag = "SPECTRAL_RESOLUTION_MOS"; 00581 } 00582 00583 00584 nref = cpl_frameset_count_tags(frameset, spatial_map_tag); 00585 00586 if (nref == 0) { 00587 fors_wave_calib_exit("Missing input spatial map"); 00588 } 00589 if (nref > 1) { 00590 cpl_msg_error(recipe, "Too many input spatial maps (%d > 1)", nref); 00591 fors_wave_calib_exit(NULL); 00592 } 00593 00594 nref = cpl_frameset_count_tags(frameset, slit_location_tag); 00595 00596 if (nref == 0) { 00597 fors_wave_calib_exit("Missing input slit location table"); 00598 } 00599 if (nref > 1) { 00600 cpl_msg_error(recipe, "Too many input slit location tables (%d > 1)", 00601 nref); 00602 fors_wave_calib_exit(NULL); 00603 } 00604 00605 nref = cpl_frameset_count_tags(frameset, curv_coeff_tag); 00606 00607 if (nref == 0) { 00608 fors_wave_calib_exit("Missing input spectral curvature table"); 00609 } 00610 if (nref > 1) { 00611 cpl_msg_error(recipe, "Too many input spectral curvature tables " 00612 "(%d > 1)", nref); 00613 fors_wave_calib_exit(NULL); 00614 } 00615 00616 00617 if (!dfs_equal_keyword(frameset, "ESO INS GRIS1 ID")) 00618 fors_wave_calib_exit("Input frames are not from the same grism"); 00619 00620 if (!dfs_equal_keyword(frameset, "ESO INS FILT1 ID")) 00621 fors_wave_calib_exit("Input frames are not from the same filter"); 00622 00623 if (!dfs_equal_keyword(frameset, "ESO DET CHIP1 ID")) 00624 fors_wave_calib_exit("Input frames are not from the same chip"); 00625 00626 00627 /* 00628 * Get the reference wavelength and the rebin factor along the 00629 * dispersion direction from the arc lamp exposure 00630 */ 00631 00632 header = dfs_load_header(frameset, spatial_map_tag, 0); 00633 00634 if (header == NULL) 00635 fors_wave_calib_exit("Cannot load arc lamp header"); 00636 00637 instrume = (char *)cpl_propertylist_get_string(header, "INSTRUME"); 00638 if (instrume == NULL) 00639 fors_wave_calib_exit("Missing keyword INSTRUME in arc lamp header"); 00640 00641 if (instrume[4] == '1') 00642 snprintf(version, 80, "%s/%s", "fors1", VERSION); 00643 if (instrume[4] == '2') 00644 snprintf(version, 80, "%s/%s", "fors2", VERSION); 00645 00646 reference = cpl_propertylist_get_double(header, "ESO INS GRIS1 WLEN"); 00647 00648 if (cpl_error_get_code() != CPL_ERROR_NONE) 00649 fors_wave_calib_exit("Missing keyword ESO INS GRIS1 WLEN " 00650 "in arc lamp frame header"); 00651 00652 if (reference < 3000.0) /* Perhaps in nanometers... */ 00653 reference *= 10; 00654 00655 if (reference < 3000.0 || reference > 13000.0) { 00656 cpl_msg_error(recipe, "Invalid central wavelength %.2f read from " 00657 "keyword ESO INS GRIS1 WLEN in arc lamp frame header", 00658 reference); 00659 fors_wave_calib_exit(NULL); 00660 } 00661 00662 cpl_msg_info(recipe, "The central wavelength is: %.2f", reference); 00663 00664 rebin = cpl_propertylist_get_int(header, "ESO DET WIN1 BINX"); 00665 00666 if (cpl_error_get_code() != CPL_ERROR_NONE) 00667 fors_wave_calib_exit("Missing keyword ESO DET WIN1 BINX " 00668 "in arc lamp frame header"); 00669 00670 if (rebin != 1) { 00671 dispersion *= rebin; 00672 cpl_msg_warning(recipe, "The rebin factor is %d, and therefore the " 00673 "working dispersion used is %f A/pixel", rebin, 00674 dispersion); 00675 } 00676 00677 00678 cpl_msg_info(recipe, "Produce mask slit position table..."); 00679 00680 if (mos) 00681 maskslits = mos_load_slits_fors_mos(header); 00682 else 00683 maskslits = mos_load_slits_fors_mxu(header); 00684 00685 00686 /* 00687 * Check if all slits have the same X offset: in such case, 00688 * treat the observation as a long-slit one! 00689 */ 00690 00691 mxpos = cpl_table_get_column_median(maskslits, "xtop"); 00692 xpos = cpl_table_get_data_double(maskslits, "xtop"); 00693 nslits = cpl_table_get_nrow(maskslits); 00694 00695 treat_as_lss = 1; 00696 for (i = 0; i < nslits; i++) { 00697 if (fabs(mxpos-xpos[i]) > 0.01) { 00698 treat_as_lss = 0; 00699 break; 00700 } 00701 } 00702 00703 cpl_table_delete(maskslits); maskslits = NULL; 00704 00705 if (treat_as_lss) { 00706 cpl_msg_error(recipe, "All slits have the same offset: %.2f mm\n" 00707 "The LSS data reduction strategy must be applied: " 00708 "please use recipe fors_wave_calib_lss", mxpos); 00709 fors_wave_calib_exit(NULL); 00710 } 00711 00712 00713 cpl_msg_indent_less(); 00714 cpl_msg_info(recipe, "Load arc lamp exposure..."); 00715 cpl_msg_indent_more(); 00716 00717 spectra = dfs_load_image(frameset, arc_tag, CPL_TYPE_FLOAT, 0, 0); 00718 00719 if (spectra == NULL) 00720 fors_wave_calib_exit("Cannot load arc lamp exposure"); 00721 00722 00723 cpl_msg_indent_less(); 00724 cpl_msg_info(recipe, "Load input line catalog..."); 00725 cpl_msg_indent_more(); 00726 00727 wavelengths = dfs_load_table(frameset, "MASTER_LINECAT", 1); 00728 00729 if (wavelengths == NULL) 00730 fors_wave_calib_exit("Cannot load line catalog"); 00731 00732 00733 /* 00734 * Cast the wavelengths into a (double precision) CPL vector 00735 */ 00736 00737 nlines = cpl_table_get_nrow(wavelengths); 00738 00739 if (nlines == 0) 00740 fors_wave_calib_exit("Empty input line catalog"); 00741 00742 if (cpl_table_has_column(wavelengths, wcolumn) != 1) { 00743 cpl_msg_error(recipe, "Missing column %s in input line catalog table", 00744 wcolumn); 00745 fors_wave_calib_exit(NULL); 00746 } 00747 00748 line = cpl_malloc(nlines * sizeof(double)); 00749 00750 for (i = 0; i < nlines; i++) 00751 line[i] = cpl_table_get(wavelengths, wcolumn, i, NULL); 00752 00753 cpl_table_delete(wavelengths); wavelengths = NULL; 00754 00755 lines = cpl_vector_wrap(nlines, line); 00756 00757 00758 cpl_msg_indent_less(); 00759 cpl_msg_info(recipe, "Load slit location table..."); 00760 cpl_msg_indent_more(); 00761 00762 slits = dfs_load_table(frameset, slit_location_tag, 1); 00763 00764 if (slits == NULL) 00765 fors_wave_calib_exit("Cannot load slit location table"); 00766 00767 00768 cpl_msg_indent_less(); 00769 cpl_msg_info(recipe, "Subtract background from input arc exposure..."); 00770 cpl_msg_indent_more(); 00771 00772 bimage = mos_arc_background(spectra, 15, 15); 00773 cpl_image_subtract(spectra, bimage); 00774 cpl_image_delete(bimage); 00775 00776 00777 cpl_msg_indent_less(); 00778 cpl_msg_info(recipe, "Perform wavelength calibration..."); 00779 cpl_msg_indent_more(); 00780 00781 nx = cpl_image_get_size_x(spectra); 00782 ny = cpl_image_get_size_y(spectra); 00783 00784 idscoeff = cpl_table_new(ny); 00785 rainbow = cpl_image_new(nx, ny, CPL_TYPE_FLOAT); 00786 residual = cpl_image_new(nx, ny, CPL_TYPE_FLOAT); 00787 fiterror = cpl_calloc(ny, sizeof(double)); 00788 fitlines = cpl_calloc(ny, sizeof(int)); 00789 00790 rectified = mos_wavelength_calibration_final(spectra, slits, lines, 00791 dispersion, peakdetection, 00792 wradius, wdegree, wreject, 00793 reference, &startwavelength, 00794 &endwavelength, fitlines, 00795 fiterror, idscoeff, rainbow, 00796 residual, NULL); 00797 00798 cpl_image_delete(spectra); spectra = NULL; 00799 00800 if (rectified == NULL) 00801 fors_wave_calib_exit("Wavelength calibration failure"); 00802 00803 save_header = cpl_propertylist_new(); 00804 cpl_propertylist_update_double(save_header, "CRPIX1", 1.0); 00805 cpl_propertylist_update_double(save_header, "CRPIX2", 1.0); 00806 cpl_propertylist_update_double(save_header, "CRVAL1", 00807 startwavelength + dispersion/2); 00808 cpl_propertylist_update_double(save_header, "CRVAL2", 1.0); 00809 /* cpl_propertylist_update_double(save_header, "CDELT1", dispersion); 00810 cpl_propertylist_update_double(save_header, "CDELT2", 1.0); */ 00811 cpl_propertylist_update_double(save_header, "CD1_1", dispersion); 00812 cpl_propertylist_update_double(save_header, "CD1_2", 0.0); 00813 cpl_propertylist_update_double(save_header, "CD2_1", 0.0); 00814 cpl_propertylist_update_double(save_header, "CD2_2", 1.0); 00815 cpl_propertylist_update_string(save_header, "CTYPE1", "LINEAR"); 00816 cpl_propertylist_update_string(save_header, "CTYPE2", "PIXEL"); 00817 cpl_propertylist_update_int(save_header, "ESO PRO DATANCOM", 1); 00818 00819 if (dfs_save_image(frameset, rectified, reduced_lamp_tag, save_header, 00820 parlist, recipe, version)) 00821 fors_wave_calib_exit(NULL); 00822 00823 cpl_propertylist_delete(save_header); save_header = NULL; 00824 save_header = cpl_propertylist_new(); 00825 00826 cpl_propertylist_update_double(save_header, "CRPIX2", 1.0); 00827 cpl_propertylist_update_double(save_header, "CRVAL2", 1.0); 00828 /* cpl_propertylist_update_double(save_header, "CDELT2", 1.0); */ 00829 cpl_propertylist_update_double(save_header, "CD1_1", 1.0); 00830 cpl_propertylist_update_double(save_header, "CD1_2", 0.0); 00831 cpl_propertylist_update_double(save_header, "CD2_1", 0.0); 00832 cpl_propertylist_update_double(save_header, "CD2_2", 1.0); 00833 cpl_propertylist_update_string(save_header, "CTYPE1", "LINEAR"); 00834 cpl_propertylist_update_string(save_header, "CTYPE2", "PIXEL"); 00835 00836 if (dfs_save_image(frameset, residual, disp_residuals_tag, save_header, 00837 parlist, recipe, version)) 00838 fors_wave_calib_exit(NULL); 00839 00840 cpl_propertylist_delete(save_header); save_header = NULL; 00841 cpl_image_delete(residual); residual = NULL; 00842 00843 cpl_table_wrap_double(idscoeff, fiterror, "error"); fiterror = NULL; 00844 cpl_table_set_column_unit(idscoeff, "error", "pixel"); 00845 cpl_table_wrap_int(idscoeff, fitlines, "nlines"); fitlines = NULL; 00846 00847 for (i = 0; i < ny; i++) 00848 if (!cpl_table_is_valid(idscoeff, "c0", i)) 00849 cpl_table_set_invalid(idscoeff, "error", i); 00850 00851 if (dfs_save_table(frameset, idscoeff, disp_coeff_tag, NULL, 00852 parlist, recipe, version)) 00853 fors_wave_calib_exit(NULL); 00854 00855 mean_rms = mos_distortions_rms(rectified, lines, startwavelength, 00856 dispersion, 6, 0); 00857 00858 cpl_msg_info(recipe, "Mean residual: %f pixel", mean_rms); 00859 00860 mean_rms = cpl_table_get_column_mean(idscoeff, "error"); 00861 00862 cpl_msg_info(recipe, "Mean model accuracy: %f pixel (%f A)", 00863 mean_rms, mean_rms * dispersion); 00864 00865 cpl_table_delete(idscoeff); idscoeff = NULL; 00866 00867 /* 00868 * Create resolution table 00869 */ 00870 00871 restab = mos_resolution_table(rectified, startwavelength, dispersion, 00872 60000, lines); 00873 00874 cpl_vector_delete(lines); lines = NULL; 00875 cpl_image_delete(rectified); rectified = NULL; 00876 00877 if (restab) { 00878 cpl_msg_info(recipe, "Mean spectral resolution: %.2f", 00879 cpl_table_get_column_mean(restab, "resolution")); 00880 cpl_msg_info(recipe, "Mean reference lines FWHM: %.2f +/- %.2f pixel", 00881 cpl_table_get_column_mean(restab, "fwhm") / dispersion, 00882 cpl_table_get_column_mean(restab, "fwhm_rms") / dispersion); 00883 00884 if (dfs_save_table(frameset, restab, spectral_resolution_tag, NULL, 00885 parlist, recipe, version)) 00886 fors_wave_calib_exit(NULL); 00887 00888 cpl_table_delete(restab); restab = NULL; 00889 } 00890 else 00891 fors_wave_calib_exit("Cannot compute the spectral resolution table"); 00892 00893 00894 cpl_msg_indent_less(); 00895 cpl_msg_info(recipe, "Load spatial map image..."); 00896 cpl_msg_indent_more(); 00897 00898 spatial = dfs_load_image(frameset, spatial_map_tag, CPL_TYPE_FLOAT, 0, 0); 00899 00900 if (spatial == NULL) 00901 fors_wave_calib_exit("Cannot load spatial map"); 00902 00903 cpl_msg_indent_less(); 00904 cpl_msg_info(recipe, "Load spectral curvature table..."); 00905 cpl_msg_indent_more(); 00906 00907 polytraces = dfs_load_table(frameset, curv_coeff_tag, 1); 00908 00909 if (polytraces == NULL) 00910 fors_wave_calib_exit("Cannot load spectral curvature table"); 00911 00912 wavemap = mos_map_wavelengths(spatial, rainbow, slits, polytraces, 00913 reference, startwavelength, endwavelength, 00914 dispersion); 00915 00916 cpl_image_delete(rainbow); rainbow = NULL; 00917 cpl_image_delete(spatial); spatial = NULL; 00918 cpl_table_delete(slits); slits = NULL; 00919 cpl_table_delete(polytraces); polytraces = NULL; 00920 00921 if (dfs_save_image(frameset, wavemap, wavelength_map_tag, header, 00922 parlist, recipe, version)) 00923 fors_wave_calib_exit(NULL); 00924 00925 cpl_image_delete(wavemap); wavemap = NULL; 00926 cpl_propertylist_delete(header); header = NULL; 00927 00928 return 0; 00929 }