ASTROSAT CZTI

Data Quality Report

Orbit 57441

Creation date: 2026-05-11T03:19:45.670232
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/AS1A14_102T01_9000006572_57441cztM0_level2.fits modeM0/AS1A14_102T01_9000006572_57441cztM0_level2_quad_clean.evt
Size (bytes)567,679,680106,715,520
Size541.4 MB 101.8 MB
Events in quadrant A4,206,207702,505
Events in quadrant B4,404,283749,939
Events in quadrant C6,277,773633,740
Events in quadrant D5,533,512614,758

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182230
B0185610
C0241310
D0217920

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76213114.080829%
B76223374.421412%
C762277410.154815%
D76214886.403359%

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 7621 7621 193 193 2.53% 2.53%
B 7622 7622 72 72 0.94% 0.94%
C 7622 7622 616 616 8.08% 8.08%
D 7621 7621 371 371 4.87% 4.87%

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 10 251 938882 4654.27 820 798 201.6
A 3 14 55335 270.58 820 798 201.6
A 4 3 17937 85.03 820 798 201.6
B 4 171 632784 3633.32 811 779 173.9
B 10 247 132325 756.24 811 779 173.9
B 7 252 113628 648.75 811 779 173.9
C 15 224 3059358 14786.19 763 754 206.9
C 14 254 78395 375.34 763 754 206.9
C 14 67 36762 174.07 763 754 206.9
D 2 249 975921 4501.9 771 736 216.6
D 7 96 344138 1585.3 771 736 216.6
D 15 94 337468 1554.51 771 736 216.6

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