ASTROSAT CZTI

Data Quality Report

Orbit 53771

Creation date: 2025-09-06T04:45:18.239684
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_022T04_9000006506_53771cztM0_level2.fits modeM0/AS1A14_022T04_9000006506_53771cztM0_level2_quad_clean.evt
Size (bytes)863,922,24078,307,200
Size823.9 MB 74.7 MB
Events in quadrant A17,820,97429,978
Events in quadrant B3,571,120689,052
Events in quadrant C6,041,849585,099
Events in quadrant D4,009,258585,165

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0577252
B0157242
C0227912
D0170172

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6912664896.180556%
B69121061.533565%
C69125908.535880%
D69121381.996528%

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 7876 6911 6614 6614 83.98% 95.70%
B 7877 6912 54 54 0.69% 0.78%
C 7876 6911 567 567 7.20% 8.20%
D 7877 6913 130 130 1.65% 1.88%

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 3 63 16249145 220915.09 290 282 73.6
A 4 249 175873 2387.29 290 282 73.6
A 8 6 110386 1496.94 290 282 73.6
B 5 185 234803 1536.32 713 689 152.4
B 0 213 106279 692.91 713 689 152.4
B 4 81 101081 658.8 713 689 152.4
C 15 224 2815748 14889.96 681 675 189.1
C 12 2 83780 439.57 681 675 189.1
C 12 252 81277 426.33 681 675 189.1
D 1 241 383255 1935.73 698 669 197.6
D 3 12 166434 838.7 698 669 197.6
D 13 153 163286 822.78 698 669 197.6

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