ASTROSAT CZTI

Data Quality Report

Orbit 35398

Creation date: 2022-04-16T12:55:34.560750
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/AS1A11_099T01_9000005068_35398cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35398cztM0_level2_quad_clean.evt
Size (bytes)877,317,12060,459,840
Size836.7 MB 57.7 MB
Events in quadrant A2,735,996463,607
Events in quadrant B12,858,954174,684
Events in quadrant C3,214,850449,050
Events in quadrant D7,374,460341,483

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117412
B0420451
C0129701
D0257151

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A571090.157618%
B5710479884.028021%
C57101342.346760%
D5710178031.173380%

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 7023 5711 3 3 0.04% 0.05%
B 7023 5711 4166 4166 59.32% 72.95%
C 7023 5711 116 116 1.65% 2.03%
D 7023 5710 1442 1442 20.53% 25.25%

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 10 83 106070 782.96 663 650 134.6
A 13 6 22954 165.65 663 650 134.6
A 7 3 20333 146.19 663 650 134.6
B 4 251 5317300 74307.9 366 357 71.6
B 5 14 1872513 26164.66 366 357 71.6
B 5 31 1766915 24688.85 366 357 71.6
C 15 214 234731 1565.53 637 641 149.5
C 0 10 211457 1409.88 637 641 149.5
C 3 233 135527 902.08 637 641 149.5
D 7 80 4157057 30868.11 540 524 134.7
D 12 233 216059 1600.65 540 524 134.7
D 13 249 139773 1034.12 540 524 134.7

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