you need use the below 'Search'-window for the fitting parameters
For example, type in the window:
405.0 1 -e 10 40000 "Enter"
or without any parametres (ie they are default: 1 -e 10 300000):
405.0 "Enter"
The first key: 0 - no error, 1 or 2 - with the errors, 3 - no fit
The second key: l - linear fitting, p - parabolic fiting, +/-e - lin + exp(+/-) fiting
fr_min/fr_max - mininum/maximum frequencies for the fitting (MHz)
Output (appending) fit-files: 3CRnnn.n.fit
Output (replacing) gif-files: 3CRnnn.n.gif
The list of the 3CRnnn.n radio sources.
2.0 76.1 175.0 245.0 296.0 357.0 460.0 6.1 78.0 175.1 247.0 297.0 368.0 465.0 9.0 79.0 180.0 249.0 298.0 371.0 468.1 11.1 83.1 181.0 249.1 299.0 379.1 469.1 13.0 84.0 184.0 250.0 300.0 380.0 470.0 14.0 86.0 184.1 252.0 300.1 381.0 14.1 88.0 186.0 254.0 303.0 382.0 15.0 91.0 187.0 255.0 303.1 386.0 16.0 89.0 190.0 256.0 305.0 388.0 17.0 93.0 191.0 257.0 305.1 389.0 18.0 93.1 192.0 258.0 306.1 390.0 19.0 98.0 194.0 263.0 309.1 390.3 20.0 99.0 196.0 263.1 310.0 394.0 21.1 103.0 196.1 264.0 313.0 399.1 22.0 105.0 197.1 265.0 314.1 401.0 27.0 107.0 198.0 266.0 315.0 402.0 28.0 109.0 200.0 267.0 317.0 403.0 29.0 111.0 204.0 268.1 318.0 403.1 31.0 114.0 205.0 270.1 318.1 405.0 33.0 123.0 207.0 268.3 319.0 409.0 33.1 119.0 208.0 268.4 320.0 410.0 33.2 124.0 208.1 270.0 321.0 411.0 34.0 125.0 210.0 268.2 322.0 415.2 35.0 129.0 212.0 272.0 323.0 418.0 36.0 129.1 213.1 272.1 323.1 424.0 40.0 130.0 215.0 273.0 324.0 427.1 41.0 131.0 216.0 274.0 325.0 428.0 42.0 132.0 217.0 274.1 326.0 430.0 43.0 133.0 219.0 275.0 326.1 431.0 44.0 134.0 220.1 275.1 327.0 432.0 46.0 135.0 220.2 277.0 327.1 433.0 47.0 136.1 220.3 277.1 330.0 434.0 48.0 137.0 222.0 277.2 332.0 435.0 49.0 138.0 223.0 277.3 334.0 436.0 52.0 139.2 223.1 280.0 336.0 437.0 54.0 141.0 225.0A 280.1 337.0 438.0 55.0 142.1 225.1B 284.0 338.0 441.0 61.1 147.0 226.0 285.0 340.0 442.0 63.0 152.0 227.0 286.0 341.0 445.0 65.0 153.0 228.0 287.0 343.0 449.0 66.0 154.0 230.0 287.1 343.1 452.0 66.0 158.0 231.0 288.0 345.0 454.0 66.1 165.0 234.0 288.1 346.0 454.1 67.0 166.0 236.0 289.0 348.0 454.2 68.1 169.1 237.0 292.0 349.0 454.3 68.2 171.0 238.0 293.0 351.0 455.0 69.0 172.0 239.0 293.1 352.0 456.0 71.0 173.0 241.0 294.0 353.0 458.0 75.0 173.1 244.1 295.0 356.0 459.0
Note: please, use Reload if you repeat plotting of same source.
Your result file will be: Fitting file and
Sp3CR Ver0.2 20/07/2003 by Sergei Trushkin (satr@sao.ru)