spi psd si User Manual
Contents
1. e siThres specifies the required minimum line detection significance in all three spectra ALL MUL and SGL to perform a sensitivity improvement calculation If this detection significance is not reached the corresponding PSD SI element if the SPI SIGN PSD table will be set to 0 If ignore no spi_psd_si will return an SPI PSD SI ERROR LINE NOT FOUND error if the specified significance was not reached in all 3 spectra e engtolRel specifies the required maximum line energy difference among the three spectra ALL MUL and SGL This parameter helps to reject cases where the line fits were captured by different in general spurious lines or statistical fluctuations Set this parameter to a value that is comparable with the instrumental energy resolution e g 1 keV The units of engtolRel is keV If ignore no spi psd si will return an SPI PSD SI ERROR INCOMPATIBLE ENERGY error if incompatible line energies have been found e ignore specifies if alerts should be ignored In this case corresponding entries in the SPI SIGN PSD table will be set to 0 yet the program execution is not stopped As default specify yes if using spi_psd_si in a pipeline this avoids task errors e bgddop specifies the degree of the polynomial that is used to fit the spectral distribution of the background events In general only a small energy window enclosing the gamma ray line is fitted hence the spectral distribution is quite well explained by a low order2. PE data it can find and builds three spectra e one where SE and PE are simply added together the total spectrum e one where only PE multiple site events are put into a spectrum the PSD spectrum e one where SE and PE non multiple site events are added together the not PSD spectrum An OBT interval may be specified that selects a particular sub interval for which the sensitivity improve ment should be determined In addition one may slice the specified OBT interval in time intervals of constant ONTIME this option guarantees a constant gamma ray line detection significance for all time intervals For each time interval and gamma ray line spi_psd_si adds one row to the SPI SIGN PSD result data structure If there are n gamma ray lines for which the sensitivity improvement should be estimated spi_psd_si adds blocks of n rows with identical OBT interval and ONTIME but different gamma ray line energies spi_psd_si fills all columns of the SPI SIGN PSD data structure hence it can be considered as complete after the task has finished The OBTFIRST and OBTLAST keywords are also updated so that index group generating tools may be used to assess the validity interval of the data structure In particular spi_psd_si may access the OBTLAST keyword set by a previous run if continuous time slices should be added to the output file parameter append yes The following columns are filled by spi_psd_si e OBT_START OBT start of the time interval
3. SPI TOOLSLIB ERROR FIT STALLED a fit stalled hence spi psd si aborted Set the task parameter ignore yes to avoid spi_psd_si abortion in case of fit errors
4. alerts minPE i h 1000 Minimum number of PE for limit checking ISDC Standard Parameters clobber b h no Overwrite existing data structures 7 mode s h ql Execution mode The following parameters have to be specified e inDOL specifies the input DOL science window group observation group or index group for which the PSD sensitivity improvement should be derived A ISDC level of PRP is sufficient if a calibration coefficient file or index file is specified in the coeffDOL parameter Energy correction is in this case performed on the fly However if the input group is of level COR the calibrated energy information from the corresponding data structures is taken irrespectively of the presence of a calibration DOL Note that if onground pulse shape analysis errors should be considered the COR level is needed in any case e lineDOL specifies the line definition DOL of HDU type SPI LINE SCT that defines which lines should be fitted by spi_psd_si e coeffDOL specifies a calibration file SPI COEF CAL or calibration index file SPI COEF CAL IDX that is used for energy calibration if the ISDC level of the input group is PRP e alertDOL optional if alert limit checking is requested limcheck yes this parameter specifies the DOL of the alert limit file SPI ALRT LIM or the alert limit index SPI ALRT LIM IDX including the HDU e outDOL specifies the output filename
5. for fitting has to be specified Within this energy window multiple gamma ray lines may be present although the most reliable results are probably achieved for isolated gamma ray lines where the background spectral shape can be securely determined from adjacent energies spi_psd_si automatically detects such secondary gamma ray lines in the spectra and adds additional Gaussians to the fit function in order to account for them properly spi_psd_si should be applied to sufficienctly strong instrumental gamma ray lines that are based on real photon interactions throughout the PSD energy range 200 keV 2 3 MeV Such a tentative list based on the analysis of calibration data is compiled in section 6 and may be used as default input list to spi_psd_si Note that the instrumental lines should at least achieve a detection significance of 100 in data TBC that do not take into account PSD information to make the method work Higher significances of course improve the reliability of the results spi psd si has been designed to execute in any kind of pipeline such as the science window pipeline or the revolution pipeline however it could also be applied to an observation group for deep performance analysis Since a sufficient number of PSD events is required for reliable PSD sensitivity improvement estimation the revolution pipeline is the priviledged location for spi_psd_si spi_psd_si has been designed to append regularily sensitivity improvement es
6. into which the sensitivity improvement estimations are written The specification of the HDU SPI SIGN PSD is optional but not required by the task If the data structure exists already spi psd si appends rows to the existing table If the data structure or the file does not exist spi_psd_si creates a new file HDU spi psd si User Manual 5 e minOBT specifies the minimum OBT limit of the events that should be used for sensitivity improvement determination The OBT format is a character string Leading 0 may be omitted If the character string is empty or if any non number character is specified such as no for example no mimimum OBT limit is applied and data accumulation starts with the first event in the input group e maxOBT specifies the maximum OBT limit of the events that should be used for sensitivity improve ment determination The OBT format is a character string Leading 0 may be omitted If the character string is empty or if any non number character is specified such as no for example no maximum OBT limit is applied and data accumulation stops with the last event in the input group e append specifies if the minimum OBT limit should be set to the last OBT that occurs in the output file specified by outDOL in order to produce a continuous set of PSD sensitivity improvement estimates The last OBT will be extracted from the keyword OBTLAST in the output file This parameter is only active if minOBT has not been
7. of the actual row e OBT_STOP OBT stop or end of the time interval of the actual row e ONTIME ontime for this row in seconds e LINE_ENERGY gamma ray line energy for which the sensitivity improvement has been estimated the values specified by the task parameters lengnn spi psd si User Manual 8 e LINE SIG ALL the gamma ray line detection significance for all 19 detectors without considering PSD information A value of 0 indicates that either the corresponding fit failed or the best fitted line energy was outside the specified energy tolerance see parameter engtol or that no line has been found above the threshold thres by the line search algorithm e LINE_SIG_MUL the gamma ray line detection significance for all 19 detectors under consideration of only PSD multiple site events A value of 0 indicates that either the corresponding fit failed or the best fitted line energy was outside the specified energy tolerance see parameter engtol or that no line has been found above the threshold thres by the line search algorithm e LINE_SIG_SGL the gamma ray line detection significance for all 19 detectors under consideration of only single detector and PSD non multiple site events single site events and analysis error events A value of 0 indicates that either the corresponding fit failed or the best fitted line energy was outside the specified energy tolerance see parameter engtol or that no line has been found above the thres
8. polynomial spi psd si User Manual 6 e maxlines specifies the maximum number of gamma ray lines that should be fitted simultaneously within the specified energy window In general only isolated lines should be used for sensitivity improvement determination in which case this parameter could be set to 1 However there may be cases where no sufficiently isolated gamma ray lines are avialable and only multi line fits provide acceptable results these additional gamma ray lines are called secondary lines e thres specifies the detection threshold in Gaussian o for the automatic line search see the descrip tion of the SPISpec function searchLines in the spi_toolslib User Manual for more information about the line search algorithm Typically a detection threshold of 4 should be used to avoid spu rious line detections If ignore no spi_psd_si will return an SPI PSD SI ERROR LINE NOT FOUND error if the threshold has not been exceeded for all 3 spectra e engtol specifies the allowed energy tolerance for the primary gamma ray line 1 e the gamma ray line for which the detection significance should be determined Energy tolerance means here the maximum energy difference between the user specified line energy see the parameters lengnn below and the detected line energy The primary line will not be searched for outside this energy interval The units of engtol is keV This parameter should be of the order of magnitude of the absolute calibrat
9. 3 ISDC alerts e minPE optional if alert limit checking is enabled limcheck yes specifies the minimum required number of PSD event PE to initiate alert limit checking This parameter avoids alert limit checking in case of insufficient event statistics To achieve reasonably good PSD sensitivity improvements a minimum number of TBD PSD events for each detector should be requested e clobber ISDC standard parameter not used so far e mode ISDC standard parameter not used so far 4 Interface definition spi_psd_si derives the PSD sensitivity improvement from a stream of photon data This photon data may be either grouped in a science window group an observation group or an index file spi_psd_si needs at least an ISDC level of PRP In this case a calibration file SPI COEF CAL or calibration index file SPI COEF CAL IDX has to be specified and energy calibration is performed on the fly However if the input group is of level COR the calibrated energy information from the corresponding data structures is taken irrespectively of the presence of a calibration DOL If onground analysis errors should be considered correctly for efficiency and threshold calculation the PSD_CORFLAG column of PSD events PE has also to be filled and an ISDC level of COR is now mandatory Make also sure that spi_psd_postprocess has been executed before calling spi_psd_si spi_psd_si scans the input group for all single event SE and PSD event
10. constant ONTIME intervals yes Skip partial time intervals ql 10000 0 Constant ONTIME slice seconds SPI mode and PSD discrimination onground b h siThres r h engtolRel r h no Use onground discrimination 4 0 2 0 99 0 Required line detection significance 1 0 0 0 99 0 Required relative energy tolerance keV Sensitivity improvement fit parameters spi psd si User Manual 4 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 222222222222 ignore b h yes Ignore fit alerts bgddop i h 1 0 3 Degree of background polynomial maxlines i h 1 1 3 Maximum number of lines fit simultaneously thres r h 4 0 2 0 99 0 Line search threshold sigma engtol r h 5 0 0 0 99 0 Primary line energy tolerance keV engtol2 r h 5 0 0 0 99 0 Secondary lines energy tolerance keV minSigma r h 0 5 0 5 10 0 Minimum line width sigma keV maxSigma r h 2 0 0 5 10 0 Maximum line width sigma keV Diagnostic parameters reportpar b h no Report line fitting parameters reportfit b h no Report line fitting details Limit checking definitions limcheck b h yes Perform limit checking alerto b h yes Generate level 0 alerts alerti b h yes Generate level 1 alerts alert2 b h yes Generate level 2 alerts alert3 b h yes Generate level 3
11. esults then in a detection significance S r If PSD information is considered the SPI single detector events split into two classes e PSD multiple site events i e PE with a PSD flag of 1 e Single detector events SE and PSD events that are not multiple site events i e PE with a PSD flag of 0 or for which an analysis error occured The gamma ray line detection significance is then estimated for both spectra seperately and subsequently added quadratically using Spsp Siu Stat 2 The sensitivity improvement ST is then simply given by SI Spsp Sar Optional alert limit checks are performed with higher alert levels preceeding lower alert levels i e an alert of the highest possible level is generated Minimum parameter limits are checked before maximum parameter limits and minimum limits have precedence over maximum limits this is not really of relevance since a parameter can not both violate the minimum and maximum limit unless the alert limit file has not been set up correctly i e the minimum limit is always smaller or equal to the maximum limit Alert limits are inclusive i e a minimum limit violation alert is generated if PARAMETER lt MIN_VAL 3 Cash W 1979 Astrophysical Journal 228 939 spi psd si User Manual 10 is fulfilled and a maximum limit violation alert is generated if PARAMETER gt MAX_VAL 4 is fulfilled Limit violation alerts are only generated if PE_NUM gt minPE 5 1s
12. fulfilled where PE_NUM is the number of PSD events per detector in a time slice 6 Potential gamma ray lines The following instrumental background lines have been identified so far in the PSD energy range Energy Isotope Single Multiple site Comments 205 31 keV 2351 570 0 keV 212Po identification uncertain 766 36 keV irPa 1001 03 keV o irPa 1064 68 keV no identificatlon 7 Alerts spi_psd_si may optionally generate alerts that signal possible PSD SPI misfunctions The following list provides the alert parameters and the actions that should be taken in case of occurence of the alerts The alert parameter in the alert message is followed by the extension Ln where n 0 18 specifies the PSD detection channel for which the alert occured If the action standard is specified in the table the standard alert action should be performed TBD Parameter Level Action LINE_SIG_ALL 0 3 standard LINE SIG MUL 0 3 standard LINE SIG SGL 0 3 standard PSD SI 0 3 standard 8 Error codes The following error codes are defined including spi_toolslib fit errors SPI_TOOLSLIB_ERROR_NO_CONVERGENCE 231202 spi toolslib SPI TOOLSLIB ERROR FIT STALLED 231203 spi toolslib SPI TOOLSLIB ERROR NR SING MATRIX 231210 spi toolslib SPI PSD SI ERROR MEM ALLOC 231700 SPI PSD SI ERROR NO LINES RE GUESTED 231701 SPI PSD SI ERROR INVALID SPI MODE 231702 SPI PSD SI ERROR NEGATIVE ALL 231703 SPI PSD SI ERROR NEGATIVE MUL 231704 s
13. global_install To perform a unit test type make test Make sure that the test data spi_test_data 1 0 tar gz are available at your site they should reside in a directory whose name is defined by the ISDC TEST DATA DIR environment variable spi psd si User Manual 3 Parameter file EHEHEHEH HERE HERRERA HERRERA HERRERA HRR HE Centre d Etude Spatiale des Rayonnements in collaboration with ISDC SPI PSD sensitivity improvement estimation HT File spi_psd_si par Version 1 4 2 Component osm Author Juergen Knoedlseder knodlseder cesr fr CESR Purpose Parameter file of the SPI PSD sensitivity improvement estimation executable History 1 4 2 5 Feb 2003 First ISDC delivery Rev 4 EHEHEHEH HERE HERRERA HERRERA HERRERA HRR HE Input DOLs inDOL s ql swg_prp_idx fits 1 Input Group DOL SWG OG IDX lineDOL s ql psd si lines fits SPI LINE SCT Line definition DOL coeffDOL s ql spi gain coeff idx fitslil Gain correction File IDX alertDOL s ql psd_limits_idx fits 1 Alert Limit DOL File IDX Output DOL outDOL s ql si fits Output DOL HDU optional OBT limits minOBT s ql Event usage minimum OBT nopart ontime gt ql Event usage maximum OBT yes Append minimum OBT to last results yes Split time interval in
14. hold thres by the line search algorithm e PSD_SI resulting sensitivity improvement for all 19 detectors A value of 0 indicates that either the ALL or both the MUL and SGL fits failed that either the ALL or both the MUL and SGL fits resulted in a line energy that is incompatible with the energy tolerance engtol or that both the best fitting MUL and SGL energies were incompatible with the best fitting ALL energy or that the sifnificance of either the ALL or the combined MUL and SGL fitting results was below the threshold siThres e SE NUM number of single detector events SE that have been collected for sensitivity improvement determination e PE NUM number of PSD events PE that have been collected for sensitivity improvement determina tion e PE NUM SGLE number of PSD events without pulse shape analysis errors that have a single site flag i e background events e PE NUM MULT number of PSD events without pulse shape analysis errors that have a multiple site flag i e photon events Optionally spi psd si is able to generate ISDC alerts if some of the sensitivity improvement parameters fall out of the defined limits The alert limits are defined by an SPI ALRT LIM structure from which the following columns are used by spi_psd_si for alert generation e PAR NAME specifies the parameter for which the limits apply Valid parameter names are LINE SIG ALL LINE SIG MUL LINE SIG SGL and PSD_SI If one of those parameter names
15. ion uncertainty If ignore no spi_psd_si will return an SPI PSD SI ERROR ENERGY NOT FOUND error if the best fitting line energy is outside the tolerance limit for at least one of the 3 spectra e engtol2 specifies the allowed energy tolerance for the secondary gamma ray lines i e the supplemen tary gamma ray lines that may have been detected by spi_psd_si within the specified energy window in addition to the primary gamma ray line Energy tolerance means in this case the maximum energy difference between the line energy that has been detected by the spi psd si line search algorithm and the best fitting line energy see the description of the SPISpec function searchLines in the spi_toolslib User Manual for more information about the line search algorithm This parameter may help to stabilise the fit in the case of nearby or even overlapping gamma ray lines The units of engtol2 is keV e minSigma specifies the minimum allowable gamma ray line width in Gaussian o Since gamma ray lines cannot be more narrow than the detector energy resolution a value of 0 5 keV seems a reasonable lower limit throughout the entire energy range Limiting the possible range of line widths will help to stabilise the fit The units of minSigma is keV e maxSigma specifies the maximum allowable gamma ray line width in Gaussian e In most cases the gamma ray lines of intrest are intrinsically narrow hence a value slightly larger than the detector energy resolution sh
16. is defined the specified limits apply to all 19 PSD channels By adding _Ln to the parameter name where n runs from 0 to 18 limits may be specified for a given PSD channel for example PSD SI 13 specifies the limits for the PSD sensitivity improvement of channel 3 Channel specific parameters have precedence over common parameters i e those without the Ln extension hence one may define common limits for all 19 PSD channel and overwrite a few limits for specific channels by specifying explicitely the channel number e MIN VAL specifies the lower limits inclusive for the four ISDC alert levels DAL table columns 1 3 corresponds to alert levels 0 3 e MAX VAL specifies the upper limits inclusive for the four ISDC alert levels DAL table columns 1 3 corresponds to alert levels 0 3 e SUB ASSEMBLY specifies the SPI PSD sub assembly and must contain the entry SPI PSD spi psd si User Manual 9 All other columns OBT_START OBT_END CHECK_MODE ALERT_DELAY of the SPI ALRT LIM structure are ignored The validity of the alert limit file is defined by the two keywords VSTART and VSTOP If an alert limit index is used these keywords are used to selected the alert limit file that 1s appropriate for the PSD sensitivity improvement validity time interval If the PSD sensitivity improvement validity time interval stops before the validity of the earliest alert limits the earliest alert limits are used by spi_psd_si a warning is issued by spi_p
17. ould provide a reasonable value as default 2 keV is proposed Limiting the possible range of line widths will help to stabilise the fit The units of maxSigma is keV e reportpar specifies if initial and result fit parameters should be reported into the log file As default reportpar no yet in case of trouble with fitting gamma ray lines one may switch to yes for diagnostics e reportfit specifies if detailed fit results should be reported into the log file As default reportfit no yet in case of trouble with fitting the gamma ray lines one may switch to yes for diagnostics e limcheck specifies if alert limit checking should be performed by spi_psd_si If set to yes spi_psd_si compares the sensitivity improvements to the limits that are specified in the alert limit file see alertDOL and optionally creates ISDC alerts see parameters alertO to alert3 Alert limit checking will be only performed for time slices that show sufficient event statistics The event statistics limit is defined by the parameter minPE e alertO optional if alert limit checking is enabled 1imcheck yes generates level 0 ISDC alerts e alerti optional if alert limit checking is enabled 1imcheck yes generates level 1 ISDC alerts e alert2 optional if alert limit checking is enabled 1imcheck yes generates level 2 ISDC alerts spi psd si User Manual 7 e alert3 optional if alert limit checking is enabled 1imcheck yes generates level
18. pi psd si User Manual 11 SPI_PSD_SI_ERROR_NEGATIVE_SGL 231705 SPI PSD SI ERROR ENERGY NOT FOUND 231706 SPI PSD SI ERROR LINE NOT FOUND 231707 SPI_PSD_SI_ERROR_INCOMPATIBLE_ENERGY 231708 SPI_PSD_SI_ERROR_INDEX_SELECT 231709 SPI_PSD_SI_ERROR_INVALID_LINE_DEF 231710 They have the following meaning e SPI PSD SI ERROR MEM ALLOC the allocation of dynamical memory has failed Probable your system resources are too limited to run this task e SPI PSD SI ERROR NO LINES REQUESTED no gamma ray line definitions have been found in task parameter file hence no significance improvement estimation can be performed e SPI PSD SI ERROR INVALID SPI MODE an invalid parameter has been specified for spiMode Only 0 or 3 are allowed values Correct task parameter file and restart task e SPI PSD SI ERROR NEGATIVE ALL the SE PE spectrum has a negative content This error should never occur It may point towards a spi toolslib error e SPI PSD SI ERROR NEGATIVE MUL the PE multiple site spectrum has a negative content This error should never occur It may point towards a spi_toolslib error e SPI PSD SI ERROR NEGATIVE SGL the PE non multiple site spectrum has a negative content This error should never occur It may point towards a spi_toolslib error e SPI PSD SI ERROR ENERGY NOT FOUND one of the specified gamma ray lines has not been found in the spectra check the log file to identify which line has not been found Either the detec
19. sd_si in this case If the validity time interval starts after the validity of the last alert limits the last alert limits are used by spi_psd_si a warning is issued by spi psd si in this case If the PSD sensitivity improvement validity time interval overlaps with the transition of two or more alert limits files those alert limits are applied that have the longest time overlap with the PSD sensitivity improvement validity time interval 5 Algorithm spi_psd_si compares two methods of analysing SPI data one without considering PSD information and one which takes into account the available PSD information If no PSD information is considered all SPI events classified as PSD events PE become equivalent to single detector events SE hence they are simply added together into a single spectrum The gamma ray line detection significance is then estimated from this spectrum using a maximum likelihood algorithm which compares the two hypotheses H a gamma ray line with unknown amplitude energy and width is present in the data Ho no gamma ray line is present in the data Ho is often referred to as null hypothesis Hi is the alternative hypothesis Following Cash the log likelihood ratio A defined as A 2 In Li In Lo 1 is distributed like a x distribuion 3 degrees of freedom where Lo is the log likelihood obtained using the null hypothesis while L is the log likelihood obtained using the alternative hypothesis This r
20. set by the user i e minOBT has precedence and will not be overwritten e slice specifies if the input group should be sliced into time frames of constant ONTIME the ONTIME is the time specified in seconds during which SPI science data were accumulated and made available to the observer e nopart optional if slice yes specifies if partial time slices i e time slices with durations that are shorter than the requested ONTIME should be skipped Partial time slices may occur at the end of a data stream and to assure a uniform quality of the PSD sensitivity improvement it is recommended to set this parameter to yes Together with append yes re execution of spi_psd_si at a later time will append new time slices that start with the OBT of the last appended time slice e ontime optional if slice yes specifies the ONTIME duration of each time slice Note that the last time slice has generally an effective ONTIME that is shorter than the specified value since in general the available ONTIME is not an integer multiple of the value specified by ontime e onground specifies if onground or onboard pulse shape discrimination should be considered for the sensitivity improvement estimate Since onground determination should be in general superior to onboard discrimination due to the more universal discrimination scheme onground PSD discrimi nation should be the default for scientific data analysis Hence as default use onground yes
21. spi_psd_si User Manual Version 1 4 2 5 February 2003 Jurgen Knodlseder Centre d Etude Spatiale des Rayonnements knodlseder cesr fr http www cesr fr jurgen index html spi psd si User Manual Note to the user This software has been written to analyse data of the SPI telescope onboard INTEGRAL Particular care has been taken in making the software user friendly and well documented If you appreciated this effort and if this software and User Manual were useful for your scientific work the author would appreciate a corresponding acknowledgment in your published work il spi psd si User Manual Contents 1 Introduction 2 Getting started 3 Parameter file 4 Interface definition 5 Algorithm 6 Potential gamma ray lines 7 Alerts 8 Error codes il 10 10 10 spi psd si User Manual 1 1 Introduction The executable spi_psd_si estimates the PSD sensitivity improvement as function of energy from an input group science window group observation group or index group for a user defined time window For this purpose spi_psd_si determines the significance of gamma ray line detections with and without taking into account PSD information The significance of a gamma ray line detection is estimated separately for each of the 19 SPI detectors by fitting Gaussian shaped line profiles on top of a polynomial to the detector spectra For each fit the energy of the requested gamma ray line as well as an energy window used
22. timates to a file and hence to build a time history of the sensitivity improvements To make the logic work spi_psd_si needs an index group on input which it will search automatically for sufficient new data i e data that are dated after the last entry in result file for sensitivity improvement computation If not enough new data is available spi psd si will do nothing spi_psd_si is written in the ANSI C language The task has been developped under ISDC support platform 5 2 and requires spi psdlib version 2 0 1 and spi toolslib version 2 0 2 or higher 2 Getting started Before installing spi_psd_si make sure that the ISDC support platform 5 2or higher is installed on your system and that you have installed the libraries spi psdlib version 2 0 1 and spi toolslib version 2 0 2 or higher After downloading the spi psd si tar gz file step into a directory that should hold the distribution move the spi psd si tar gz file into this directory and type gunzip spi psd si tar gz tar xvf spi psd si tar The first command uncompresses the distribution file the second unpacks the files Before configuration the distribution needs to be reset to a clean state To do this type make distclean Then configure the distribution It is assumed here that you have previously installed the ISDC support platform thus you should type spi psd si User Manual 2 bin ac_stuff configure Finally build the distribution by typing make
23. tion thereshold defined by the task parameter thres is set too high or the specified line energy does indeed not correspond to a gamma ray line that is detectible within the specified integration time Set the task parameter ignore yes to avoid spi_psd_si abortion in this case e SPI PSD SI ERROR LINE NOT FOUND the specified gamma ray line has not be found within the spectra Set the task parameter ignore yes to avoid spi psd si abortion in this case e SPI PSD SI ERROR INCOMPATIBLE ENERGY the best fitting line energies in the spectra ALL MUL and SGL were incompatible Set the task parameter ignore yes to avoid spi_psd_si abortion in this case e SPI PSD SI ERROR INDEX SELECT while searching a single member in an index group DAL3GEN returned more than one member This should never happen If this error occurs it is likely that the alert limit index you specified on input is somehow corrupted e SPI_PSD_SI_ERROR_INVALID_LINE_DEF an invalid line definition file has been found not used so far In addition the following spi_toolslib errors may signal fit problems e SPI TOOLSLIB ERROR NR SING MATRIX a fit encountered a singular matrix hence spi_psd_si aborted Set the task parameter ignore yes to avoid spi psd si abortion in case of fit errors e SPI TOOLSLIB ERROR NO CONVERGENCE a fit did not converge hence spi_psd_si aborted Set the task parameter ignore yes to avoid spi psd si abortion in case of fit errors e
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