ASTROSAT CZTI

Data Quality Report

Orbit 20200918_A09_044T01_9000003888_level2

Creation date: 2021-01-08T06:35:15.526825
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A09_044T01_9000003888cztM0_level2_bc.evt modeM0/AS1A09_044T01_9000003888cztM0_level2_quad_clean.evt
Size (bytes)2,443,993,920560,491,200
Size2.3 GB 534.5 MB
Events in quadrant A12,151,1973,642,108
Events in quadrant B22,348,3923,395,138
Events in quadrant C9,712,6373,639,485
Events in quadrant D26,836,5963,302,181

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08900
B08900
C08900
D08900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0991070
B01387650
C0925040
D01542950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0920
B0920
C0920
D0920

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A436235071.162231%
B43623535512.275634%
C436235571.276849%
D43623437110.019944%

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 52903 43623 59 59 0.11% 0.14%
B 52902 43617 1778 1778 3.36% 4.08%
C 52903 43623 15 15 0.03% 0.03%
D 52903 43622 1258 1258 2.38% 2.88%

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 13 2297303 4314.68 2500 2469 531.9
A 5 168 139407 257.47 2500 2469 531.9
A 13 254 66297 120.01 2500 2469 531.9
B 0 189 6098501 13579.63 2406 2359 448.9
B 3 64 3664668 8158.08 2406 2359 448.9
B 10 245 2140358 4762.56 2406 2359 448.9
C 0 207 181623 316.2 2445 2448 566.6
C 15 208 74544 127.23 2445 2448 566.6
C 3 233 34983 57.42 2445 2448 566.6
D 1 52 9498889 17690.87 2345 2293 536.8
D 7 80 4550567 8472.82 2345 2293 536.8
D 12 233 1269091 2359.87 2345 2293 536.8

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