ASTROSAT CZTI

Data Quality Report

Orbit 55626

Creation date: 2026-01-09T17:40:51.670610
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/AS1A14_021T06_9000006538_55626cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55626cztM0_level2_quad_clean.evt
Size (bytes)667,581,120106,770,240
Size636.7 MB 101.8 MB
Events in quadrant A8,073,920670,170
Events in quadrant B3,995,595771,437
Events in quadrant C6,539,370625,334
Events in quadrant D5,502,354626,326

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0292045
B0175960
C0250020
D0218322

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77567729.953584%
B7758590.760505%
C77587739.963908%
D77573474.473379%

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 7757 7757 966 966 12.45% 12.45%
B 7758 7758 33 33 0.43% 0.43%
C 7758 7758 699 699 9.01% 9.01%
D 7757 7757 388 388 5.00% 5.00%

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 12 115 3655360 18715.92 784 763 195.3
A 0 8 622106 3182.02 784 763 195.3
A 15 32 216256 1103.58 784 763 195.3
B 7 0 432474 2539.23 795 764 170.0
B 0 173 121353 709.28 795 764 170.0
B 10 247 79027 460.33 795 764 170.0
C 15 148 2284244 11172.14 751 743 204.4
C 12 2 826387 4039.5 751 743 204.4
C 13 3 266794 1301.67 751 743 204.4
D 11 129 662633 3038.58 774 738 217.8
D 8 245 654236 3000.03 774 738 217.8
D 6 46 326287 1494.51 774 738 217.8

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