ASTROSAT CZTI

Data Quality Report

Orbit 35901

Creation date: 2022-06-08T23:40:34.710703
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/AS1A11_080T01_9000005146_35901cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35901cztM0_level2_quad_clean.evt
Size (bytes)421,099,20061,148,160
Size401.6 MB 58.3 MB
Events in quadrant A2,723,268386,999
Events in quadrant B3,184,418371,646
Events in quadrant C2,857,181375,612
Events in quadrant D3,641,197359,149

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0280

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0109493
B0124602
C0111402
D0144472

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5108110.215348%
B51081723.367267%
C5108701.370399%
D51081072.094753%

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 7171 5109 4 4 0.06% 0.08%
B 7171 5109 113 113 1.58% 2.21%
C 7171 5109 49 49 0.68% 0.96%
D 7171 5109 79 79 1.10% 1.55%

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 10 83 162285 1240.81 643 633 130.3
A 15 169 43141 326.28 643 633 130.3
A 7 3 16882 124.72 643 633 130.3
B 5 172 448014 3782.24 626 613 118.3
B 5 255 223961 1888.14 626 613 118.3
B 0 213 23942 197.22 626 613 118.3
C 0 10 224403 1570.93 618 625 142.4
C 15 214 215543 1508.73 618 625 142.4
C 6 255 8802 57.4 618 625 142.4
D 8 195 409249 2757.5 616 602 148.2
D 13 153 203114 1366.53 616 602 148.2
D 2 250 133160 894.49 616 602 148.2

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