ASTROSAT CZTI

Data Quality Report

Orbit 20220219_A05_176T05_9000004944_level2

Creation date: 2026-01-01T05:52:26.029936
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/AS1A05_176T05_9000004944cztM0_level2.fits modeM0/AS1A05_176T05_9000004944cztM0_level2_quad_clean.evt
Size (bytes)73,048,32062,971,200
Size69.7 MB 60.1 MB
Events in quadrant A457,988375,471
Events in quadrant B433,978374,493
Events in quadrant C449,588363,385
Events in quadrant D341,960264,349

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155890
B0173460
C0164820
D0398360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7596120.157978%
B7596961.263823%
C7596490.645076%
D7596166221.879937%

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 11662 7596 0 0 0.00% 0.00%
B 11662 7596 0 0 0.00% 0.00%
C 11662 7596 0 0 0.00% 0.00%
D 11662 7575 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 29 410 9.69 119 113 30.6
A 0 30 383 8.81 119 113 30.6
A 7 110 364 8.19 119 113 30.6
B 2 9 398 11.5 114 110 25.0
B 3 80 361 10.03 114 110 25.0
B 2 8 338 9.11 114 110 25.0
C 1 80 398 8.93 118 111 32.1
C 1 81 388 8.62 118 111 32.1
C 3 202 361 7.78 118 111 32.1
D 7 3 274 6.85 97 90 26.9
D 15 46 260 6.33 97 90 26.9
D 4 160 249 5.92 97 90 26.9

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