ASTROSAT CZTI

Data Quality Report

Orbit 34881

Creation date: 2022-03-11T23:45:04.363491
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_005T01_9000004992_34881cztM0_level2.evt modeM0/AS1C07_005T01_9000004992_34881cztM0_level2_quad_clean.evt
Size (bytes)494,824,32086,057,280
Size471.9 MB 82.1 MB
Events in quadrant A2,905,032570,703
Events in quadrant B3,625,924571,985
Events in quadrant C3,129,849561,795
Events in quadrant D4,959,606524,017

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0122643
B0143182
C0126612
D0185152

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A53891412.616441%
B53892053.804045%
C53891031.911301%
D53893175.882353%

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 7092 5390 118 118 1.66% 2.19%
B 7092 5390 114 114 1.61% 2.12%
C 7092 5390 95 95 1.34% 1.76%
D 7092 5390 296 296 4.17% 5.49%

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 15 237 436801 3496.62 616 603 124.7
A 10 83 63151 501.39 616 603 124.7
A 13 6 17650 136.65 616 603 124.7
B 5 172 311056 2681.84 611 596 115.8
B 5 31 239189 2061.04 611 596 115.8
B 0 190 224363 1932.96 611 596 115.8
C 0 207 373795 2702.15 594 598 138.1
C 15 214 245406 1772.55 594 598 138.1
C 0 10 154824 1116.68 594 598 138.1
D 8 195 1150132 7933.87 584 565 144.9
D 10 118 337807 2327.52 584 565 144.9
D 2 31 292051 2011.73 584 565 144.9

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