ASTROSAT CZTI

Data Quality Report

Orbit 35831

Creation date: 2022-05-19T16:23:41.889460
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/AS1A10_071T19_9000005144_35831cztM0_level2.evt modeM0/AS1A10_071T19_9000005144_35831cztM0_level2_quad_clean.evt
Size (bytes)589,993,92064,926,720
Size562.7 MB 61.9 MB
Events in quadrant A5,929,620365,357
Events in quadrant B2,970,319436,909
Events in quadrant C2,947,376429,921
Events in quadrant D5,630,551329,805

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215393
B0125542
C0123092
D0206022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5755126922.050391%
B5755791.372719%
C5755641.112076%
D5755113019.635100%

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 7158 5756 1278 1278 17.85% 22.20%
B 7158 5756 56 56 0.78% 0.97%
C 7158 5756 59 59 0.82% 1.03%
D 7158 5756 1114 1114 15.56% 19.35%

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 15 169 3404188 27508.19 611 601 123.7
A 10 83 140714 1132.41 611 601 123.7
A 13 6 14274 110.51 611 601 123.7
B 5 252 121094 951.82 655 638 126.6
B 5 172 119631 940.26 655 638 126.6
B 5 255 68715 537.93 655 638 126.6
C 15 214 241056 1598.43 641 644 150.4
C 0 10 195373 1294.7 641 644 150.4
C 0 207 13029 82.34 641 644 150.4
D 2 250 2632674 18347.01 574 557 143.5
D 7 223 392675 2733.23 574 557 143.5
D 13 249 144702 1004.75 574 557 143.5

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