ASTROSAT CZTI

Data Quality Report

Orbit 35777

Creation date: 2022-05-13T17:54:11.335352
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_121T01_9000005136_35777cztM0_level2.evt modeM0/AS1A09_121T01_9000005136_35777cztM0_level2_quad_clean.evt
Size (bytes)1,250,046,720188,743,680
Size1.2 GB 180.0 MB
Events in quadrant A8,257,2731,167,364
Events in quadrant B8,782,9781,184,885
Events in quadrant C9,299,3651,167,408
Events in quadrant D10,463,8061,118,784

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0342275
B0359834
C0367124
D0409174

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03180
B03180
C03180
D03180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156212871.837270%
B156211941.241918%
C156213752.400615%
D156217004.481147%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 19830 15624 218 218 1.10% 1.40%
B 19830 15624 113 113 0.57% 0.72%
C 19830 15624 279 279 1.41% 1.79%
D 19830 15624 641 641 3.23% 4.10%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 237 789333 2154.5 1813 1773 365.5
A 10 83 402459 1096.14 1813 1773 365.5
A 13 6 32608 84.35 1813 1773 365.5
B 5 172 483790 1405.23 1807 1760 343.0
B 5 255 347935 1009.18 1807 1760 343.0
B 4 232 236819 685.25 1807 1760 343.0
C 1 23 1140107 2781.07 1758 1770 409.3
C 15 214 661213 1611.09 1758 1770 409.3
C 0 10 557920 1358.73 1758 1770 409.3
D 10 118 1255757 2947.42 1746 1697 425.5
D 8 195 687267 1611.3 1746 1697 425.5
D 13 249 521777 1222.35 1746 1697 425.5

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter