ASTROSAT CZTI

Data Quality Report

Orbit 36139

Creation date: 2022-08-10T19:21:20.157592
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/AS1T04_069T01_9000005158_36139cztM0_level2.evt modeM0/AS1T04_069T01_9000005158_36139cztM0_level2_quad_clean.evt
Size (bytes)1,191,176,640210,283,200
Size1.1 GB 200.5 MB
Events in quadrant A7,482,9411,366,729
Events in quadrant B9,885,4641,332,282
Events in quadrant C8,554,1751,322,939
Events in quadrant D9,103,4691,275,583

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03209423
B03961832
C03517616
D03758939

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03140
B03140
C03140
D03140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15536220.141607%
B155357374.744126%
C155392171.396486%
D155322941.892866%

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 19784 15548 1 1 0.01% 0.01%
B 19784 15547 456 456 2.30% 2.93%
C 19784 15548 175 175 0.88% 1.13%
D 19784 15546 255 255 1.29% 1.64%

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 444746 1234.4 1784 1747 358.9
A 8 144 93532 255.75 1784 1747 358.9
A 9 143 26072 67.78 1784 1747 358.9
B 5 172 2461063 7372.33 1736 1688 333.6
B 0 213 147513 437.13 1736 1688 333.6
B 4 171 134185 397.18 1736 1688 333.6
C 0 207 725258 1822.86 1705 1715 396.9
C 15 214 657385 1651.87 1705 1715 396.9
C 1 23 246271 616.12 1705 1715 396.9
D 1 52 655433 1554.45 1712 1664 420.6
D 2 249 328061 776.07 1712 1664 420.6
D 12 17 321743 761.05 1712 1664 420.6

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