ASTROSAT CZTI

Data Quality Report

Orbit 20220424_A11_046T08_9000005088_level2

Creation date: 2026-01-02T10:58:02.512905
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_046T08_9000005088cztM0_level2.fits modeM0/AS1A11_046T08_9000005088cztM0_level2_quad_clean.evt
Size (bytes)299,070,720352,264,320
Size285.2 MB 335.9 MB
Events in quadrant A1,800,1582,113,110
Events in quadrant B1,721,5882,190,931
Events in quadrant C1,800,4062,210,423
Events in quadrant D1,465,2981,886,723

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0837340
B0815590
C0722850
D01111590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06700
B06700
C06700
D06700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3300515994.844720%
B3300513994.238752%
C330052980.902894%
D33005370011.210423%

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 44538 32999 0 0 0.00% 0.00%
B 44538 32965 0 0 0.00% 0.00%
C 44538 33000 0 0 0.00% 0.00%
D 44538 32984 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 1498 8.86 470 442 119.1
A 7 110 1485 8.75 470 442 119.1
A 9 19 1431 8.3 470 442 119.1
B 2 9 1490 11.63 456 436 90.7
B 3 80 1350 10.08 456 436 90.7
B 5 128 1223 8.68 456 436 90.7
C 3 187 1295 6.82 477 448 124.2
C 1 65 1237 6.35 477 448 124.2
C 9 233 1198 6.04 477 448 124.2
D 7 3 1118 6.48 418 380 114.0
D 6 62 1094 6.26 418 380 114.0
D 10 113 1088 6.21 418 380 114.0

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