ASTROSAT CZTI

Data Quality Report

Orbit 20220225_A11_065T06_9000004958_level2

Creation date: 2026-01-01T08:40:04.850574
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/AS1A11_065T06_9000004958cztM0_level2.fits modeM0/AS1A11_065T06_9000004958cztM0_level2_quad_clean.evt
Size (bytes)287,380,800269,271,360
Size274.1 MB 256.8 MB
Events in quadrant A1,782,9161,544,308
Events in quadrant B1,708,1821,680,186
Events in quadrant C1,769,0141,636,351
Events in quadrant D1,461,1201,312,400

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0851460
B0815380
C0633780
D01114720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05880
B05880
C05880
D05880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2879723208.056395%
B2879721957.622322%
C287972510.871619%
D2879726319.136368%

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 40843 28793 0 0 0.00% 0.00%
B 40843 28740 0 0 0.00% 0.00%
C 40843 28793 0 0 0.00% 0.00%
D 40843 28772 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 1466 9.02 466 443 113.4
A 9 19 1425 8.66 466 443 113.4
A 7 110 1408 8.51 466 443 113.4
B 2 9 1402 10.87 453 437 88.8
B 3 80 1326 10.02 453 437 88.8
B 5 128 1212 8.73 453 437 88.8
C 1 81 1414 8.16 468 442 119.2
C 3 202 1385 7.91 468 442 119.2
C 1 80 1379 7.86 468 442 119.2
D 7 3 1116 6.66 418 385 109.8
D 6 231 1094 6.46 418 385 109.8
D 10 189 1056 6.11 418 385 109.8

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