ASTROSAT CZTI

Data Quality Report

Orbit 35175

Creation date: 2022-03-31T19:19:36.095446
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/AS1C07_001T06_9000005046_35175cztM0_level2.evt modeM0/AS1C07_001T06_9000005046_35175cztM0_level2_quad_clean.evt
Size (bytes)812,177,280102,997,440
Size774.6 MB 98.2 MB
Events in quadrant A2,694,357789,460
Events in quadrant B8,706,103614,762
Events in quadrant C3,128,507765,686
Events in quadrant D9,721,805586,941

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110543
B0294632
C0122412
D0324342

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5137140.272533%
B5137241647.031341%
C5137881.713062%
D5137255849.795601%

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 7259 5138 3 3 0.04% 0.06%
B 7259 5138 1747 1747 24.07% 34.00%
C 7259 5138 74 74 1.02% 1.44%
D 7259 5138 2642 2642 36.40% 51.42%

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 89152 677.64 663 653 130.6
A 15 169 23838 177.53 663 653 130.6
A 13 6 10582 76.03 663 653 130.6
B 5 236 6298757 63552.1 535 522 99.1
B 5 172 179991 1810.92 535 522 99.1
B 0 182 48057 479.65 535 522 99.1
C 0 10 223110 1540.04 636 643 144.5
C 15 214 214641 1481.41 636 643 144.5
C 0 207 144358 994.88 636 643 144.5
D 10 203 3611284 26875.42 553 539 134.4
D 8 195 3470909 25830.58 553 539 134.4
D 2 249 90655 670.75 553 539 134.4

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