ASTROSAT CZTI

Data Quality Report

Orbit 55742

Creation date: 2026-01-17T09:33:17.725293
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_099T04_9000006540_55742cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55742cztM0_level2_quad_clean.evt
Size (bytes)721,739,52099,066,240
Size688.3 MB 94.5 MB
Events in quadrant A9,196,804563,000
Events in quadrant B3,153,310746,943
Events in quadrant C7,766,354593,335
Events in quadrant D6,017,963573,378

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0324114
B0152920
C0281720
D0232200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7512165121.978168%
B7513110.146413%
C7513105113.989086%
D75137489.956076%

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 7512 7512 1361 1361 18.12% 18.12%
B 7513 7513 2 2 0.03% 0.03%
C 7513 7513 910 910 12.11% 12.11%
D 7513 7513 726 726 9.66% 9.66%

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 32 5088471 29043.86 709 693 175.2
A 8 249 500683 2854.22 709 693 175.2
A 0 8 282733 1610.04 709 693 175.2
B 4 206 34523 201.75 775 746 167.4
B 12 111 20553 118.3 775 746 167.4
B 11 111 19252 110.53 775 746 167.4
C 15 199 1775933 9080.21 709 702 195.5
C 9 38 1348724 6895.06 709 702 195.5
C 15 164 1034593 5288.3 709 702 195.5
D 11 129 2496728 12123.7 731 698 205.9
D 6 42 189302 916.09 731 698 205.9
D 8 245 134175 648.32 731 698 205.9

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