ASTROSAT CZTI

Data Quality Report

Orbit 20200916_T03_224T01_9000003872_level2

Creation date: 2025-12-15T02:09:16.634038
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/AS1T03_224T01_9000003872cztM0_level2.fits modeM0/AS1T03_224T01_9000003872cztM0_level2_quad_clean.evt
Size (bytes)992,329,920802,555,200
Size946.4 MB 765.4 MB
Events in quadrant A6,194,8704,606,989
Events in quadrant B5,971,1944,686,618
Events in quadrant C6,139,4304,574,333
Events in quadrant D4,965,4783,659,316

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02431010
B02368130
C02084640
D03260200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020160
B020160
C020160
D020160

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9884929472.981315%
B9884932183.255470%
C9884920292.052626%
D988491321113.364829%

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 114299 98816 0 0 0.00% 0.00%
B 114299 98829 0 0 0.00% 0.00%
C 114299 98841 0 0 0.00% 0.00%
D 114299 96514 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 5164 9.34 1613 1519 390.0
A 7 110 5042 9.03 1613 1519 390.0
A 0 30 4602 7.9 1613 1519 390.0
B 2 9 4766 10.67 1578 1510 305.3
B 2 8 3933 7.94 1578 1510 305.3
B 5 255 3932 7.93 1578 1510 305.3
C 1 81 4867 8.22 1622 1523 407.0
C 1 80 4794 8.04 1622 1523 407.0
C 12 241 4234 6.66 1622 1523 407.0
D 3 14 3651 6.34 1415 1292 372.0
D 7 3 3529 6.01 1415 1292 372.0
D 6 38 3469 5.85 1415 1292 372.0

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