ASTROSAT CZTI

Data Quality Report

Orbit 20220103_T04_090T01_9000004840_level2

Creation date: 2025-12-31T05:43:56.975900
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/AS1T04_090T01_9000004840cztM0_level2.fits modeM0/AS1T04_090T01_9000004840cztM0_level2_quad_clean.evt
Size (bytes)957,968,640869,561,280
Size913.6 MB 829.3 MB
Events in quadrant A5,790,4444,947,493
Events in quadrant B5,613,5705,118,716
Events in quadrant C5,874,6445,059,687
Events in quadrant D4,824,3104,307,193

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03950
B03950
C03950
D03950

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02894110
B02533990
C02287250
D03671470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020540
B020540
C020540
D020540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10068985438.484542%
B10068943584.328179%
C10068913881.378502%
D10068993519.287012%

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 139017 100561 0 0 0.00% 0.00%
B 139017 100610 0 0 0.00% 0.00%
C 139017 100666 0 0 0.00% 0.00%
D 139017 100611 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 9 19 4694 8.85 1510 1424 369.3
A 7 110 4653 8.74 1510 1424 369.3
A 0 29 4550 8.46 1510 1424 369.3
B 2 9 4866 11.81 1488 1426 291.3
B 3 80 4473 10.46 1488 1426 291.3
B 2 8 3922 8.57 1488 1426 291.3
C 1 81 5010 9.06 1553 1464 391.4
C 1 80 4855 8.66 1553 1464 391.4
C 3 203 4474 7.69 1553 1464 391.4
D 4 160 3582 6.43 1383 1266 360.5
D 7 3 3555 6.35 1383 1266 360.5
D 10 113 3511 6.23 1383 1266 360.5

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