ASTROSAT CZTI

Data Quality Report

Orbit 35809

Creation date: 2022-05-13T17:06:29.586151
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_146T01_9000005142_35809cztM0_level2.evt modeM0/AS1A09_146T01_9000005142_35809cztM0_level2_quad_clean.evt
Size (bytes)465,776,64065,448,000
Size444.2 MB 62.4 MB
Events in quadrant A3,146,446414,807
Events in quadrant B3,132,405415,445
Events in quadrant C3,009,961408,464
Events in quadrant D4,451,011365,104

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0126473
B0126992
C0119952
D0167122

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5393711.316521%
B53931112.058224%
C53931262.336362%
D53934338.028926%

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 7155 5394 50 50 0.70% 0.93%
B 7155 5394 79 79 1.10% 1.46%
C 7155 5394 109 109 1.52% 2.02%
D 7155 5394 415 415 5.80% 7.69%

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 454255 3473.14 654 642 130.6
A 10 83 159625 1217.27 654 642 130.6
A 13 254 8676 61.51 654 642 130.6
B 5 255 356385 2903.43 643 626 122.5
B 5 172 95623 775.29 643 626 122.5
B 0 190 58276 470.49 643 626 122.5
C 0 10 337740 2323.78 623 628 145.1
C 15 214 226620 1557.81 623 628 145.1
C 10 49 13728 90.3 623 628 145.1
D 2 250 1013659 6796.53 614 596 149.1
D 13 153 296455 1984.89 614 596 149.1
D 13 249 259424 1736.45 614 596 149.1

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