Follow Us
|
IMAPS-1 Wavelength Calibration
The IMAPS-1 wavelengths were generated using an IDL routine (wave1.pro) which requires as input, the x and y pixel location, and the order number and wavelength, of one spectral feature identified in the IMAPS image. Based on this one fiducial wavelength, the program generates a wavelength array for each order. The starting wavelength and wavelength increment are then stored in the binary table extension contained in the coadded image FITS file.
The table below shows the wavelength (in Å ), order number, echelle position (1-4), x & y position (in pixels), and the line identification for the fiducial spectral feature used in each of the coadded, corrected IMAPS-1 images. Since these line identifications are the basis for the IMAPS-1 wavelength calibrations, any errors in these values would affect the wavelength calibration for that particular image.
Note that no other wavelength corrections have been applied to the IMAPS-1 files, and the source of the absorption line used determines the wavelength reference frame. For example, since most of the files use interstellar lines, the wavelength assignments would correspond to an interstellar reference frame. Note telluric lines were used for a few files.
File Wavelength Order Pos X,Y Values Element
(A) (pixels)
089_093 1063.1760 213 4 126,317 Fe II
094_098 1134.1650 199 1 114,463 N I
099_103 1096.8770 206 2 286,375 Fe II
104_108 1066.6600 212 3 75,318 Ar I
109_112 1064.9930 212 1 307,339 3,0 R(2)
113_116 1051.0341 215 2 284,287 4,0 P(1)
117_120 1077.6980 210 3 443,339 2,0 R(1)
121_122 1063.4611 213 4 251,315 3,0 R(1)
121_124 1063.4611 213 4 251,315 3,0 R(1)
125_128 1134.1650 199 1 112,468 N I
129_132 1096.8770 206 2 285,377 Fe II
134_136 1066.6600 212 3 67,321 Ar I
138_139 1048.2190 216 4 61,286 Ar I
141_142 1064.9950 212 1 217,335 3,0 R(2) ?
143_144 1051.4990 215 2 470,286 4,0 R(2)
145_146 1066.9010 212 3 117,318 4,0 R(6)
150_152 1040.3669 217 1 241,335 5,0 P(2)
153_155 1081.2650 209 2 310,348 2,0 P(2)
156_158 1038.1560 218 3 432,260 5,0 P(1)
159_161 1078.9250 210 4 366,349 2,0 P(1)
File Wavelength Order Pos X,Y Values Element
(A) (pixels)
162_164 1064.9950 212 1 257,337 3,0 R(2) ?
165_167 1081.2650 209 2 330,348 2,0 P(2)
168_170 1092.7321 207 3 184,369 1,0 R(1)
171_172 1078.9250 210 4 375,348 2,0 P(1)
195_197 1064.6050 212 1 141,335 3,0 P(1)
198_199 1051.0341 215 2 353,286 4,0 P(1)
200_201 1038.1560 218 3 505,258 5,0 P(1)
202_204 1078.9250 210 4 441,353 2,0 P(1)
205_206 1049.9630 215 1 64,401 4,0 R(1)
207_209 1051.0341 215 2 282,354 4,0 P(1)
210_212 1038.1560 218 3 431,327 5,0 P(1)
213_214 1078.9250 210 4 358,408 2,0 P(1)
220_222 1064.9950 212 1 284,333 3,0 R(2) ?
223_224 1051.4990 215 2 536,284 4,0 R(2)
225_226 1066.9010 212 3 184,314 4,0 R(6)
227_229 1078.9250 210 4 407,341 2,0 P(1)
230_231 1064.9950 212 1 206,400 3,0 R(2) ?
232_233 1051.4990 215 2 453,356 4,0 R(2)
234_236 1066.9010 212 3 103,385 4,0 R(6)
237_238 1063.4600 213 4 203,380 3,0 R(1)
File Wavelength Order Pos X,Y Values Element
(A) (pixels)
276_277 1134.1650 199 1 173,465 N I
278_280 1096.8770 206 2 334,379 Fe II
286_288 1012.5010 223 1 252,300 S III ?
289_290 1096.8770 206 2 258,441 Fe II
291_292 1066.6600 212 3 46,383 Ar I
293_294 1063.1760 213 4 123,379 Fe II?
296_299 1064.9950 212 1 301,338 3,0 R(2) ?
300_302 1081.2650 209 2 378,347 2,0 P(2)
303_305 1077.6980 210 3 500,339 2,0 R(1)
306_309 1078.9250 210 4 442,344 2,0 P(1)
310_312 1064.9950 212 1 334,403 3,0 R(2) ?
313_315 1081.2650 209 2 307,411 2,0 P(2)
316_319 1092.7321 207 3 171,443 1,0 R(1)
320_322 1078.9250 210 4 367,409 2,0 P(1)
331_333 1064.9950 212 1 152,336 3,0 R(2) ?
334_336 1051.0341 215 2 190,289 4,0 P(1)
337_339 1066.9010 212 3 53,321 4,0 R(6)
340_342 1078.9250 210 4 273,348 2,0 P(1)
343_346 1064.9950 212 1 245,270 3,0 R(2) ?
347_349 1051.4990 215 2 505,216 4,0 R(2)
File Wavelength Order Pos X,Y Values Element
(A) (pixels)
350_352 1066.9010 212 3 156,250 4,0 R(6)
353_355 1078.9250 210 4 379,279 2,0 P(1)
378_381 1064.9930 212 1 173,339 3,0 R(2) ?
382_385 1051.4990 215 2 430,290 4,0 R(2)
386_389 1038.1560 218 3 365,261 5,0 P(1)
390_394 1078.9250 210 4 300,347 2,0 P(1)
395_398 1049.9630 215 1 195,238 4,0 R(1)
399_402 1051.4990 215 2 537,215 4,0 R(2)
440_442 1039.2300 218 4 168,278 O I
443_445 1134.1650 199 1 198,441 N I
705_705 1134.9800 199 1 549,437 N I
706_707 1134.9800 199 1 550,436 N I
708_710 1066.6600 212 2 535,306 Ar I
711_712 1048.2190 216 3 525,270 Ar I
711_713 1048.2190 216 3 525,271 Ar I
 |
|
|
|
|
|
|
|
|
|