ASTROSAT CZTI

Data Quality Report

Orbit 20210121_A10_093T01_9000004128_level2

Creation date: 2025-12-19T23:54:04.204032
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/AS1A10_093T01_9000004128cztM0_level2.fits modeM0/AS1A10_093T01_9000004128cztM0_level2_quad_clean.evt
Size (bytes)639,898,560521,199,360
Size610.3 MB 497.1 MB
Events in quadrant A4,067,2063,109,427
Events in quadrant B3,861,9383,103,694
Events in quadrant C3,800,8042,772,427
Events in quadrant D3,264,0162,413,897

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01345340
B01471780
C01832620
D02156000

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012980
B012980
C012980
D012980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A639007811.222222%
B6390016652.605634%
C6390033045.170579%
D6390057809.045383%

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 75170 63892 0 0 0.00% 0.00%
B 75170 63887 0 0 0.00% 0.00%
C 75170 63881 0 0 0.00% 0.00%
D 75170 63823 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 3896 11.16 1062 1000 259.6
A 7 110 3186 8.42 1062 1000 259.6
A 0 30 3053 7.91 1062 1000 259.6
B 2 9 3018 10.41 1022 981 195.6
B 3 17 2572 8.13 1022 981 195.6
B 14 254 2561 8.08 1022 981 195.6
C 1 81 2925 7.88 1003 941 251.6
C 1 80 2782 7.32 1003 941 251.6
C 12 241 2615 6.65 1003 941 251.6
D 15 46 2343 6.02 933 852 247.8
D 6 231 2300 5.84 933 852 247.8
D 3 14 2296 5.83 933 852 247.8

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