ASTROSAT CZTI

Data Quality Report

Orbit 35426

Creation date: 2022-04-20T21:05:23.608281
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/AS1A11_097T07_9000005072_35426cztM0_level2.evt modeM0/AS1A11_097T07_9000005072_35426cztM0_level2_quad_clean.evt
Size (bytes)848,983,68082,647,360
Size809.7 MB 78.8 MB
Events in quadrant A3,002,114592,450
Events in quadrant B12,419,150359,910
Events in quadrant C3,605,967585,858
Events in quadrant D6,258,479522,481

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128963
B0411782
C0143872
D0227362

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A630640.063432%
B6306435469.045354%
C6306951.506502%
D630680212.718046%

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 9204 6308 1 1 0.01% 0.02%
B 9204 6308 3568 3568 38.77% 56.56%
C 9204 6308 64 64 0.70% 1.01%
D 9204 6308 700 700 7.61% 11.10%

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 136018 909.14 737 722 148.8
A 13 254 10494 65.66 737 722 148.8
A 13 6 8278 50.77 737 722 148.8
B 4 251 6497497 64498.22 516 503 100.7
B 5 236 1048237 10401.27 516 503 100.7
B 5 31 869143 8623.33 516 503 100.7
C 0 10 304542 1819.37 715 719 167.0
C 15 214 256102 1529.29 715 719 167.0
C 0 207 250176 1493.81 715 719 167.0
D 7 80 1141379 6724.11 688 668 169.6
D 12 233 933703 5499.93 688 668 169.6
D 1 52 689608 4061.07 688 668 169.6

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