Data, Calibration and Analysis with SOT/HINODE
HINODE
• Solar Optical Telescope (SOT)
• EUV Imaging Spectrometer (EIS)
• X-ray Telescope (XRT)
Solar Optical TelescopeOptical Telescope assembly specifications
Telescope Optics Aplanatic Gregorian telescope
Primary mirror 50 cm diameter aperture
Primary-secondary mirror length
1.5 m
Effective f-ratio 9.055 at secondary focus
Image stabilization system (Correlation tracker and Tip-tilt mirror)
0.01” accuracy
Solar Optical Telescope-Optics
Broad-band Filter Imager (BFI)CCD camera 4kx2K pixels full field of view
Field of view 218”x109”
Spatial sampling 0.0541”/pixel (full resolution)
Center (Å) Band width (Å) Line of Interest Purpose
3883.5 7 CN I Magnetic network imaging
3968.5 3 Ca II H Chromospheric heating
4305.0 8 CH I Magnetic elements
4504.5 4 Blue Continuum Temperature
5550.5 4 Green continuum
Temperature
6684.0 4 Red continuum Temperature
Exposure time 0.03-0.8 sec
Narrow-band Filter Imager (NFI)CCD camera 4kx2K pixels full field of view
Field of view 328”x164”
Spatial sampling 0.08”/pixel (full resolution)
Spectral resolution 90 mÅ at 6300 Å
Center (Å) Tunable range (Å) Lines geff Purpose
5172 6 Mg I b 5172.7 1.75 Chromospheric dopp and mag
5250 6 Fe I 5247.1
Fe I 5250.2
Fe I 5250.6
2.00
3.00
1.50
Photospheric magnetograms
5576 6 Fe I 5576.1 0.0 Photo Dopp
5896 6 Na I D 5896 - Chromospheric mag (scattering pol.)
6300 6 Fe I 6301.5
Fe I 6302.5
Ti I 6303.8
1.67
2.50
0.92
Photo mag.
Umbral mag
6563 6 H I 6562.8 - Chromo. structure
Exposure time 0.1-1.6 sec
Spectro-Polarimeter (SP)
FOV along slit 164” N-S direction
Spatial scan range ±164”
Slit width 0.16”
Spectral coverage 6300.8 – 6303.2 Å
Spectral resolution/sampling 30 mÅ/21.5mÅ
Polarization measurement Stokes I, Q, U, V simultaneously with dual beam and dual camera
Polarization S/N 10³ (with normal mapping)
Level-0 Data of Hinode • The Level-0 data are not calibrated.
• The fits files are in Level-0 data.
• Level -1, 2 obtained after calibrating the data with SSW software, which includes dark subtraction and flat fielding etc.
• SOT FITS Data Format
http://solar-b.nao.ac.jp/hrc_e/lv0_desc.shtml
Filenames of SOT Level-0 fits files1. FGyyyymodd_hhmmss.s.fits
FG Filtergram. Ex: G-Band, Ca II K, Blue continuum, Na D1 etc.
2. FGIVyyyymodd_hhmmss.s.fits
FGIV Shuttered Stokes I and V images.
3. FGSIVyyyymodd_hhmmss.s.fits
FGSIV shutterless Stokes-I and V images.
4. FGSIQUVyyyymodd_hhmmss.s.fits
FGSIQUV shutter less Stokes I, Q, U & V images.
5. SP4Dyyyymodd_hhmmss.s.fits
The Stokes spectrum data (SOT-SP), 4D Stokes I, Q, U & V. The unit of the file is one slit position, not one raster.
yyyy:Year, mo:Month, dd:Day, hh:Hour, mm:Minutes ss/ss.s:Second
Examples of SOT/FG filenames• Each data sets are arranged under the subdirectory
/hinode/sot/level0/year/month/date/FG/hour/filenames
Ex: /disk/jf1/HINODE/sot/level0/2006/12/28/FG/H0000
/disk/jf1/HINODE/sot/level0/2006/12/28/FGIQUV/H1700
/disk/jf1/HINODE/sot/level0/2006/12/28/SP4D/H0000
• Filenames of Level-0 data.
Ex: 1. FG20061228_00253332.2.fits
2. FGIQUV20061228_170032.1.fits
3. FGIV20061228_103518.2.fits
4. FGSIQUV20061228_170212.5.fits
5. SP4D20061228_00645.4.fits
Routines to calibrate the FG/SOT data• To check the SOT data catalog.idl> sot_cat,'2006-10-28','2006-10-29',sotcat
To check the available data between 2006-10-28 to 2006-10-29, the structure sotcat contains the information. Then one can use the following routine to see the files.
idl> files = sot_cat2files(sotcat)All the names of the files and their paths are stored in files.
Idl> read_sot,files,index,dataTo read those files use the routine read_sot and the calling sequence is as above.
Idl> sot_cat,'28-Dec-06 15:00','28-Dec-06 18:00',index,files,/level0One can use the above arguments to check the data between 15:00 – 18:00 UT of 28th December 2006. The file names and their paths are stored in files.
• To read and calibrate the broad-band image data.idl> file = findfile(‘*.fits’)idl> mreadfits, file,indexidl> ss = where(index.WAVE eq ‘Ca II H line’) Or Index.Wave eq ‘G band 4305’ or ‘CN bandhead 3883’ or ‘blue cont 4504’ or ‘red
cont 6684’ or ‘green cont 5550’Idl>fg_prep,file(ss),index_out,image_out,/despike,/display,/float,/verbose,/
tf_deripple,/outflatfits,outdir=‘/disk/data/ravindra/hinode/’Process an SOT BFI or NFI filtergram, magnetogram, dopplergram, or Stokes set despike - cosmic ray removal, /no_flat - skip flat fielding (This option is necessary for
NFI.), /float - return images with floating (default: integer), /quiet - set for fewer messgaes, /verb - set for lots of messages
Idl> write_sot,index_out,data_out
Rigid Alignment of the FG imagesidl> fileb = findfile('reg20070406_*.fits')idl> mreadfits,fileb,indexb,databIdl> fg_rigidalign, indexb, datab, index_outb, data_outb, dx = 512, dy =512, x0
= 10, y0 = 10, nt = 40 dx=the x-dimension of the box in which image-to-image correlations are calculated. Default =
256. dy=the y-dimension of the box in which image-to-image correlations are calculated. ; Default
= 256. X0: the x-coordinate of the lower-left corner of the correlation box. ; Default = image center. ; Y0: the y-coordinate of the lower-left corner of the correlation box. ; Default = image center. ; Nt: the number of images correlated at one time, i.e. the number of images ; assembled into a
subgroup and aligned with respect to the first image in the group. ; Default = 4. Set this parameter to be less than the number of images over which the ; correlated structures in the images change significantly.
To make a movieIdl>xstepper,data [,info_array , xsize=xsize, ysize=ysize, /interp ,start=start,
/noscale]
make Hinode SOT/XRT movies for given time range ; hinode_make_wwwmovies.pro
Programs to calibrate the SP/SOT level0 data
idl> file=sot_filelist(obs,start_time,end_time,topdir=topdir0,/scanset, sltidx=sltidx,macroid=macroid,sp_end=sp_end) ;extract file list from level-0/1 data tree
idl> dir=sot_filelist(‘SP4D','20061124_010000','20061124_032000') ; => extract SP4D data directory between start_time and end_time
idl>file=findfile(‘./SP4D20070406*.fits’)idl>sp_prep,file,index,ldata,/display,outdir=‘/hinode/apr0607/’File = array of file pathnames for one operation.Index, ldata= return index(header) and data(*,*,4).Input file size: Ex: Filename: SP4D20070302_161839.2.fitsDATA INT = Array[112, 512, 2, 4]Calibrated data:ex: SP4D20070302_161839.2C.fitsDATA INT = Array[112, 512, 4]
Inversion of Stokes signal to vector magnetic field
• Community inversion codes:http://www.hao.ucar.edu/public/research/cic/index.html(1) LILIA v3.1(2) MELANIE v2.01
(3) DIANNE v0.9 (BETA!)Wavelength = ((findgen (112) - index(0).crpix1) * abs (index(0).cdelt1) + index(0).crval1)
Co-ordinate of the
reference pixel
Spectral res.
Wavelength of the reference pixel
http://darts.isas.jaxa.jp/hinode
http://sot.lmsal.com/sot-data
http://kurasuta.cfa.harvard.edu/VSO
THREE DATA ARCHIVES
Thank You
SP-Mapping mode
Time per position 4.8 sec 1-rot. Wave plate
FOV along slit 32”
Sampling along slit 0.16”
Slit-scan sampling 0.16”
S/N 580
Time for map area 18 sec for 1.6” wide
Time per position Many rot. – upto 8 rot.
FOV along slit 164”
Sampling along slit 0.16”
Slit scan sampling 0.16”
S/N >10³
Deep Magnetogram
Dynamic Mode
Spectro-Polarimeter Mapping mode
Normal map
Time per position 4.8 sec 3-rot. of wave plate
FOV along slit 164”
Sampling along slit 0.16”
Slit-scan sampling 0.16”
S/N 10³
Time for map area 50 sec for 1.6” wide
83 min. for 160” wide
Time per position 3.2 sec 1 rot. for Ist slit pos. and IInd for another slit pos.
FOV along slit 164”
Sampling along slit 0.32”
Slit scan sampling 0.32”
S/N 10³
Time for map area 18 sec. for 1.6” wide
30 min for 160” wide
Fast Map
TF Bubble in the FOV
TF6
TF5~1A
Tunable elements which carries the bubbles are identified.
Tunable filter bubble
big bubble
TF7Small bubbles