Update of default eta value using empirical high trigger rate data #188
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…gh trigger rate data
samaloney
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Oct 18, 2023
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grazwegian
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Oct 30, 2023
* i4ds: Initial release of basic routines for downloading L2 AUX ephemeris files given a date and L1 science data fits files given a UID. (i4Ds#189) Fixed bug in the estimation of the total number of bkg counts (i4Ds#186) stx_livetime_fraction: update of default eta value using empirical high trigger rate data (i4Ds#188) Energy calibration improvement (i4Ds#183) Call lightcurve without generating FITS files (i4Ds#181) Respect shift_duration if file is "possibly summed on board". (i4Ds#180) Clarify flare_location coordinates (i4Ds#169) # Conflicts: # stix/dbase/detector/elut_index.csv
grazwegian
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* i4ds: Initial release of basic routines for downloading L2 AUX ephemeris files given a date and L1 science data fits files given a UID. (i4Ds#189) Fixed bug in the estimation of the total number of bkg counts (i4Ds#186) stx_livetime_fraction: update of default eta value using empirical high trigger rate data (i4Ds#188) Energy calibration improvement (i4Ds#183) Call lightcurve without generating FITS files (i4Ds#181) Respect shift_duration if file is "possibly summed on board". (i4Ds#180) Clarify flare_location coordinates (i4Ds#169) # Conflicts: # stix/dbase/detector/elut_index.csv # stix/dbase/detector/science_echan_index.csv # stix/idl/demo/stx_ospex_spectroscopy_demo.pro # stix/idl/processing/spectrogram/stx_convert_pixel_data.pro # stix/idl/processing/spectrogram/stx_convert_science_data2ospex.pro # stix/idl/processing/spectrogram/stx_convert_spectrogram.pro # stix/idl/processing/spectrogram/stx_fsw_sd_spectrogram2ospex.pro # stix/idl/processing/spectrogram/stx_science_data_lightcurve.pro
grazwegian
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Nov 22, 2023
* i4ds: Initial release of basic routines for downloading L2 AUX ephemeris files given a date and L1 science data fits files given a UID. (i4Ds#189) Fixed bug in the estimation of the total number of bkg counts (i4Ds#186) stx_livetime_fraction: update of default eta value using empirical high trigger rate data (i4Ds#188) Energy calibration improvement (i4Ds#183) Call lightcurve without generating FITS files (i4Ds#181) Respect shift_duration if file is "possibly summed on board". (i4Ds#180) Clarify flare_location coordinates (i4Ds#169) # Conflicts: # stix/dbase/detector/elut_index.csv
grazwegian
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Dec 14, 2023
* i4ds: (28 commits) Bugfix release stx_read_fits : uncommented call to mrdfits to prevent compilation issue when getting version number preparing a new release Fixed bug in selection of energy indices of pixel data matrix (i4Ds#185) stx_subc_transmission: Improved accuracy of message displayed if simple_transm keyword is set. Update by Massa, P. - use simplified version of the subcollimator transmission for imaging (temporary solution) Some Improvement in aspect processing (i4Ds#179) Initial release of basic routines for downloading L2 AUX ephemeris files given a date and L1 science data fits files given a UID. (i4Ds#189) Fixed bug in the estimation of the total number of bkg counts (i4Ds#186) stx_livetime_fraction: update of default eta value using empirical high trigger rate data (i4Ds#188) Energy calibration improvement (i4Ds#183) Call lightcurve without generating FITS files (i4Ds#181) Respect shift_duration if file is "possibly summed on board". (i4Ds#180) Clarify flare_location coordinates (i4Ds#169) changed default behaviour of flux keyword Improvements to transmission following suggestions from @paolomassa. Value of flux = 1 passed through from stx_fsw_sd_spectrogram2ospex. Additional description of calculation of linear attenuation coefficient in stx_subc_transmission. stx_write_ospex_fits: fix grid factor recording in FITS file for srm file stx_write_ospex_fits: fix grid factor recording in FITS file stx_subc_transmission: added default to calculate low energy approximation if no input photon energies are passed fix calculation for single included grid ... # Conflicts: # stix/idl/processing/spectrogram/stx_convert_pixel_data.pro # stix/idl/processing/spectrogram/stx_convert_science_data2ospex.pro # stix/idl/processing/spectrogram/stx_convert_spectrogram.pro # stix/idl/processing/spectrogram/stx_science_data_lightcurve.pro
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Due to the possibility of some photons which occur during the dead time producing triggers after reset the nominal value of the latency results in an overcorrection at high rates. An empirical value has been determined using the high energy calibration lines which prevents them being overcorrected when the trigger rate is high but there is negligible flare influence in this range. This value should be used as the default until a more detailed model accounting for the additional “zombie photons” can be developed.