ASTROSAT CZTI

Data Quality Report

Orbit 20171113_A04_021T06_9000001688_level2

Creation date: 2025-11-18T09:02:27.049524
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/AS1A04_021T06_9000001688cztM0_level2.fits modeM0/AS1A04_021T06_9000001688cztM0_level2_quad_clean.evt
Size (bytes)604,598,400606,179,520
Size576.6 MB 578.1 MB
Events in quadrant A3,344,0583,169,814
Events in quadrant B3,538,9323,515,728
Events in quadrant C3,705,5463,784,182
Events in quadrant D3,195,3403,367,886

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02407580
B01752440
C01355500
D01627220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013420
B013420
C013420
D013420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0950
B0950
C0950
D0950

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A659021199418.199751%
B6590234965.304847%
C659024460.676762%
D6590216172.453643%

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 75352 64978 0 0 0.00% 0.00%
B 75352 65896 0 0 0.00% 0.00%
C 75352 65902 0 0 0.00% 0.00%
D 75352 65896 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 3223 10.85 874 817 221.7
A 7 110 2836 9.11 874 817 221.7
A 0 30 2521 7.68 874 817 221.7
B 2 9 2981 11.17 933 886 187.5
B 3 17 2390 8.02 933 886 187.5
B 14 254 2323 7.67 933 886 187.5
C 1 80 2837 7.59 977 907 254.2
C 1 81 2790 7.41 977 907 254.2
C 12 241 2548 6.45 977 907 254.2
D 6 231 2323 6.11 912 829 244.5
D 3 14 2298 6.01 912 829 244.5
D 1 19 2268 5.89 912 829 244.5

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