ASTROSAT CZTI

Data Quality Report

Orbit 25261

Creation date: 2024-06-27T19:15:38.825320
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/AS1A09_027T01_9000003694_25261cztM0_level2.evt modeM0/AS1A09_027T01_9000003694_25261cztM0_level2_quad_clean.evt
Size (bytes)826,505,280107,239,680
Size788.2 MB 102.3 MB
Events in quadrant A3,165,472751,446
Events in quadrant B3,800,923746,748
Events in quadrant C8,743,396615,699
Events in quadrant D8,864,016660,489

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0139170
B0158320
C0304960
D0311690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6774320.472394%
B67731372.022737%
C6773228133.677838%
D6773125518.529455%

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 7639 6775 1 1 0.01% 0.01%
B 7638 6774 51 51 0.67% 0.75%
C 7638 6774 1713 1713 22.43% 25.29%
D 7638 6774 944 944 12.36% 13.94%

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 3 1 14237 82.15 815 798 163.6
A 13 254 11108 63.03 815 798 163.6
A 0 226 7056 38.26 815 798 163.6
B 3 64 265494 1764.73 809 790 150.0
B 15 33 210530 1398.3 809 790 150.0
B 0 219 63731 419.62 809 790 150.0
C 0 239 5880469 38183.05 664 667 154.0
C 14 238 103310 666.56 664 667 154.0
C 3 233 100541 648.58 664 667 154.0
D 9 35 3141936 16954.44 763 740 185.3
D 1 52 1948716 10514.1 763 740 185.3
D 8 195 441346 2378.15 763 740 185.3

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