ASTROSAT CZTI

Data Quality Report

Orbit 20220421_A11_097T22_9000005082_level2

Creation date: 2026-01-02T10:50:58.333194
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_097T22_9000005082cztM0_level2.fits modeM0/AS1A11_097T22_9000005082cztM0_level2_quad_clean.evt
Size (bytes)684,106,560730,843,200
Size652.4 MB 697.0 MB
Events in quadrant A3,958,3284,166,723
Events in quadrant B3,928,0264,380,312
Events in quadrant C4,160,1964,479,729
Events in quadrant D3,600,7504,042,388

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02890
B02890
C02890
D02890

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01948930
B02051010
C01770310
D01820090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015080
B015080
C015080
D015080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7387066378.984703%
B7387055837.557872%
C7387016562.241776%
D7387020692.800866%

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 102718 72510 0 0 0.00% 0.00%
B 102718 73817 0 0 0.00% 0.00%
C 102718 73860 0 0 0.00% 0.00%
D 102718 73846 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 7 110 3283 8.97 1033 970 257.7
A 9 19 3213 8.7 1033 970 257.7
A 0 29 3142 8.43 1033 970 257.7
B 2 9 3429 12.01 1040 997 202.5
B 3 80 3035 10.06 1040 997 202.5
B 2 8 2840 9.1 1040 997 202.5
C 1 81 3436 8.47 1099 1031 283.7
C 1 80 3386 8.3 1099 1031 283.7
C 3 203 3284 7.94 1099 1031 283.7
D 7 3 2687 6.29 1029 940 277.8
D 4 160 2642 6.13 1029 940 277.8
D 3 14 2638 6.11 1029 940 277.8

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