ASTROSAT CZTI

Data Quality Report

Orbit 20210821_T04_043T01_9000004648_level2

Creation date: 2025-12-28T09:45:26.787286
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/AS1T04_043T01_9000004648cztM0_level2.fits modeM0/AS1T04_043T01_9000004648cztM0_level2_quad_clean.evt
Size (bytes)175,089,600141,022,080
Size167.0 MB 134.5 MB
Events in quadrant A1,091,434797,083
Events in quadrant B1,017,024791,256
Events in quadrant C1,046,206763,126
Events in quadrant D921,726692,200

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0367500
B0545820
C0386140
D0458550

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03640
B03620
C03640
D03620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A177891340.753274%
B177303311.866892%
C178133331.869421%
D178042951.656931%

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 21336 17906 0 0 0.00% 0.00%
B 21336 17808 0 0 0.00% 0.00%
C 21335 17904 0 0 0.00% 0.00%
D 21336 17882 0 0 0.00% 0.00%

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 0 29 892 8.75 284 267 71.4
A 7 110 839 8.01 284 267 71.4
A 9 19 813 7.64 284 267 71.4
B 2 9 837 10.54 269 256 55.1
B 3 17 696 7.98 269 256 55.1
B 5 128 685 7.78 269 256 55.1
C 1 81 817 7.87 276 259 70.9
C 1 80 807 7.73 276 259 70.9
C 3 187 746 6.87 276 259 70.9
D 15 47 714 6.68 263 239 71.2
D 10 189 677 6.16 263 239 71.2
D 7 3 659 5.9 263 239 71.2

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