ASTROSAT CZTI

Data Quality Report

Orbit 35195

Creation date: 2022-04-02T04:49:20.875488
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/AS1T05_020T01_9000005050_35195cztM0_level2.evt modeM0/AS1T05_020T01_9000005050_35195cztM0_level2_quad_clean.evt
Size (bytes)716,094,72086,751,360
Size682.9 MB 82.7 MB
Events in quadrant A3,148,966575,928
Events in quadrant B8,039,898519,421
Events in quadrant C3,641,336564,459
Events in quadrant D6,427,400522,869

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134613
B0283562
C0145382
D0235192

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6364150.235701%
B6364169426.618479%
C63641302.042740%
D63645578.752357%

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 9050 6366 6 6 0.07% 0.09%
B 9050 6365 1077 1077 11.90% 16.92%
C 9050 6366 95 95 1.05% 1.49%
D 9050 6366 418 418 4.62% 6.57%

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 107263 707.67 750 735 150.5
A 15 169 76402 502.66 750 735 150.5
A 13 6 23326 150.07 750 735 150.5
B 5 236 5100358 38487.08 680 662 132.5
B 4 232 65308 487.88 680 662 132.5
B 0 155 58521 436.66 680 662 132.5
C 0 10 439514 2600.7 724 730 168.7
C 15 214 265840 1571.32 724 730 168.7
C 1 23 58832 344.37 724 730 168.7
D 8 195 2352233 13450.74 710 690 174.8
D 10 118 365692 2087.8 710 690 174.8
D 2 250 248001 1414.61 710 690 174.8

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