LSO SUMMER INTERNSHIP PROGRAM 2026 - HAND-ON DATA

JR, 2026/06/08

BASIC directory: https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/

1/ LSO/CoMP-S OBSERVATIONS:

DAY: 2022/11/02

DETAILED LOG OF THE OBSERVING DAY:
https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/comp-s_data_2022_656_587/20221102/logs/2022_11_02_CoMP-S_obs_prog_observer.log

SUMMARY LOG OF THE OBSERVING DAY:
https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/comp-s_data_2022_656_587/20221102/logs/2022_11_02_CoMP-S_data_summary.txt

RAW DATA MOVIES - 656 and 587 lines - cameras 1 and 2:
https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/comp-s_data_2022_656_587/20221102/raw_data_movies/

2/ DATA REDUCTION PERFORMED:

- dark, flat, chip corrections
- quasi-continuum background scattered light subtraction
- prefilter transparency correction
- calibration to the absolute energetic units [W/cm2/A/ster]
- wavelength scale zero point offset correction - general over the whole chip

- calculation of the quick look I,V,W data from the line profile analysis using
  the Gaussian model for line spectral parameters from 3 points
  (see Tian et al., 2013,   https://doi.org/10.1007/s11207-013-0317-5 +
       Morton et al., 2016, https://doi.org/10.3847/0004-637X/828/2/89)

3/ REDUCED EXAMPLE DATA:

- directory: https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/comp-s_data_2022_656_587/20221102/reduced_data_examples_656_587/

- its subdirectories:

      FITS     - FITS files of the LSO CoMP-S lev4.1 Stokes I data
      MAPS_XDR - IDL XDR files of the LSO CoMP-S lev4.1 Stokes I in D.Zarro's SSW maps format
      MAPS_JPG - JPG format images of the intensity at scan central wavepoint
      QL_IVW_MAPS_XDR - quicklook Gaussian IVW parameters of the profiles

4/ HOW-TO - IDL XDR format file reading in PYTHON:

- https://www.astro.sk/lso_sip_2026/lso_sip_hands-on_data/readme_idl_XDRformat_to_python.txt

2/ QL_IVW_MAPS_XDR SUBDIRECTORY SPECTRAL CHARACTERISTICS IDL HANDLING:

restore,'lso_comp-s_lev4.0_20221102_090932_wave0587_pa023_mapspch.xdr',/ver
IDL> help,mapspch                                                               
MAPSPCH         STRUCT    = -> <Anonymous> Array[4]
IDL> help,mapspch(0) - Gaussian amplitude
** Structure <188dc88>, 20 tags, length=5529800, data length=5529789,
refs=2:
   DATA            FLOAT     Array[1280, 1080]
   XC              DOUBLE          -41.422718
   YC              DOUBLE           1101.3122
   DX              DOUBLE          0.44035193
   DY              DOUBLE          0.44035193
   TIME            STRING    ' 2-Nov-2022 09:09:34.710'
   ID              STRING    'COMP-S/LSO:'
   DUR             DOUBLE          0.80000000
   XUNITS          STRING    'arsecs'
   YUNITS          STRING    'arsecs'
   ROLL_ANGLE      DOUBLE           23.000000
   ROLL_CENTER     DOUBLE    Array[2]
   B0              DOUBLE           4.2696870
   IUNITS          STRING    'W/cm2/A/ster'
   LINE            FLOAT           587.600
   RMOON           FLOAT           975.051
   RSUN            DOUBLE           966.37973
   SOHO            BYTE         0
   VARIABLE        STRING    'Intensity'
   WAVELENGTH      FLOAT           587.575
IDL> help,mapspch(1) - Doppler shift
** Structure <188dc88>, 20 tags, length=5529800, data length=5529789,
refs=2:
   DATA            FLOAT     Array[1280, 1080]
   XC              DOUBLE          -41.422718
   YC              DOUBLE           1101.3122
   DX              DOUBLE          0.44035193
   DY              DOUBLE          0.44035193
   TIME            STRING    ' 2-Nov-2022 09:09:34.710'
   ID              STRING    'COMP-S/LSO:'
   DUR             DOUBLE          0.80000000
   XUNITS          STRING    'arsecs'
   YUNITS          STRING    'arsecs'
   ROLL_ANGLE      DOUBLE           23.000000
   ROLL_CENTER     DOUBLE    Array[2]
   B0              DOUBLE           4.2696870
   IUNITS          STRING    'nm'
   LINE            FLOAT           587.600
   RMOON           FLOAT           975.051
   RSUN            DOUBLE           966.37973
   SOHO            BYTE         0
   VARIABLE        STRING    'Wavelength shift'
   WAVELENGTH      FLOAT           587.575
IDL> help,mapspch(2) - Gaussian line width
** Structure <188dc88>, 20 tags, length=5529800, data length=5529789,
refs=2:
   DATA            FLOAT     Array[1280, 1080]
   XC              DOUBLE          -41.422718
   YC              DOUBLE           1101.3122
   DX              DOUBLE          0.44035193
   DY              DOUBLE          0.44035193
   TIME            STRING    ' 2-Nov-2022 09:09:34.710'
   ID              STRING    'COMP-S/LSO:'
   DUR             DOUBLE          0.80000000
   XUNITS          STRING    'arsecs'
   YUNITS          STRING    'arsecs'
   ROLL_ANGLE      DOUBLE           23.000000
   ROLL_CENTER     DOUBLE    Array[2]
   B0              DOUBLE           4.2696870
   IUNITS          STRING    'nm'
   LINE            FLOAT           587.600
   RMOON           FLOAT           975.051
   RSUN            DOUBLE           966.37973
   SOHO            BYTE         0
   VARIABLE        STRING    'Width'
   WAVELENGTH      FLOAT           587.575
IDL> help,mapspch(3) - wrong data
** Structure <188dc88>, 20 tags, length=5529800, data length=5529789,
refs=2:
   DATA            FLOAT     Array[1280, 1080]
   XC              DOUBLE          -41.422718
   YC              DOUBLE           1101.3122
   DX              DOUBLE          0.44035193
   DY              DOUBLE          0.44035193
   TIME            STRING    ' 2-Nov-2022 09:09:34.710'
   ID              STRING    'COMP-S/LSO:'
   DUR             DOUBLE          0.80000000
   XUNITS          STRING    'arsecs'
   YUNITS          STRING    'arsecs'
   ROLL_ANGLE      DOUBLE           23.000000
   ROLL_CENTER     DOUBLE    Array[2]
   B0              DOUBLE           4.2696870
   IUNITS          STRING    'W/cm2/A/ster'
   LINE            FLOAT           587.600
   RMOON           FLOAT           975.051
   RSUN            DOUBLE           966.37973
   SOHO            BYTE         0
   VARIABLE        STRING    'Intensity'
   WAVELENGTH      FLOAT           587.575

===================================================================================
ORIGINAL DIRECTORY OF THE DATA:

penumbra:/mnt/RAIDofsI/choc/data/for_ps_comp-s_20221102-03_lev4_data_in_fits_and_maps/20221102/OBSE/