ASTROSAT CZTI

Data Quality Report

Orbit 00920

Creation date: 2024-06-27T14:04:46.501713
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/AS1P01_163T03_9000000186_00920cztM0_level2.evt modeM0/AS1P01_163T03_9000000186_00920cztM0_level2_quad_clean.evt
Size (bytes)1,576,235,520130,875,840
Size1.5 GB 124.8 MB
Events in quadrant A11,517,590832,856
Events in quadrant B12,684,687835,059
Events in quadrant C11,962,482823,422
Events in quadrant D10,944,354813,792

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01940
B01940
C01940
D01940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0409270
B0443980
C0422970
D0392430

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9496710.747683%
B94941211.274489%
C9494900.947967%
D94951031.084781%

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 10771 9498 325 325 3.02% 3.42%
B 10771 9497 576 576 5.35% 6.07%
C 10771 9497 378 378 3.51% 3.98%
D 10771 9498 345 345 3.20% 3.63%

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 15 127 43228 55.52 2981 3000 724.6
A 15 233 23962 28.93 2981 3000 724.6
A 15 69 13261 14.16 2981 3000 724.6
B 3 0 248441 329.83 3116 3129 743.8
B 7 221 210956 279.43 3116 3129 743.8
B 5 191 135792 178.37 3116 3129 743.8
C 15 241 846254 1067.37 2819 2918 790.1
C 9 52 37792 44.14 2819 2918 790.1
C 3 111 37246 43.45 2819 2918 790.1
D 10 85 277480 320.99 2742 2832 855.6
D 12 188 155074 177.93 2742 2832 855.6
D 1 4 116625 132.99 2742 2832 855.6

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