ASTROSAT CZTI

Data Quality Report

Orbit 35020

Creation date: 2022-07-18T20:13:37.564440
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_010T01_9000005016_35020cztM0_level2.evt modeM0/AS1T05_010T01_9000005016_35020cztM0_level2_quad_clean.evt
Size (bytes)447,451,20076,740,480
Size426.7 MB 73.2 MB
Events in quadrant A2,688,556487,538
Events in quadrant B3,432,985498,005
Events in quadrant C2,958,514484,126
Events in quadrant D4,082,408454,019

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0117373
B0140632
C0120932
D0161072

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5722110.192240%
B57222183.809857%
C5722510.891297%
D57221602.796225%

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 7154 5723 3 3 0.04% 0.05%
B 7154 5723 177 177 2.47% 3.09%
C 7154 5723 46 46 0.64% 0.80%
D 7154 5723 154 154 2.15% 2.69%

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 10 83 79259 585.84 664 650 134.2
A 15 223 21695 156.84 664 650 134.2
A 7 3 11691 82.28 664 650 134.2
B 0 190 374041 2981.39 652 637 125.2
B 5 172 285116 2271.38 652 637 125.2
B 0 197 105435 836.74 652 637 125.2
C 15 214 242313 1602.56 650 655 150.8
C 0 10 167228 1104.63 650 655 150.8
C 14 67 7639 46.31 650 655 150.8
D 8 195 819507 5264.98 642 626 155.5
D 1 47 303546 1947.62 642 626 155.5
D 13 249 165934 1062.84 642 626 155.5

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