ASTROSAT CZTI

Data Quality Report

Orbit 20220201_A05_012T02_9000004898_level2

Creation date: 2022-02-04T10:22:32.671484
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/AS1A05_012T02_9000004898cztM0_level2_bc.evt modeM0/AS1A05_012T02_9000004898cztM0_level2_quad_clean.evt
Size (bytes)829,224,000216,907,200
Size790.8 MB 206.9 MB
Events in quadrant A2,668,1381,519,359
Events in quadrant B3,446,8801,542,459
Events in quadrant C3,972,7981,516,320
Events in quadrant D14,249,7101,206,153

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0237180
B0265410
C0281440
D0649430

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580
B0580
C0580
D0580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02320
B02320
C02320
D02320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11341250.220439%
B113411060.934662%
C113412702.380742%
D11341398335.120360%

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 17078 11343 0 0 0.00% 0.00%
B 17078 11341 15 15 0.09% 0.13%
C 17078 11341 40 40 0.23% 0.35%
D 17078 11340 1481 1481 8.67% 13.06%

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 44429 299.27 668 661 146.3
A 13 6 23707 157.58 668 661 146.3
A 9 191 21669 143.64 668 661 146.3
B 5 172 385889 2972.06 677 666 129.6
B 4 251 104249 799.16 677 666 129.6
B 0 199 73291 560.31 677 666 129.6
C 14 254 672729 4474.24 663 661 150.2
C 15 214 448050 2978.46 663 661 150.2
C 0 10 135290 896.28 663 661 150.2
D 12 227 4881104 36745.88 559 544 132.8
D 12 235 2408324 18128.25 559 544 132.8
D 1 52 2331896 17552.82 559 544 132.8

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