ASTROSAT CZTI

Data Quality Report

Orbit 18915

Creation date: 2024-06-27T17:56:29.328817
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/AS1A05_163T01_9000002820_18915cztM0_level2.evt modeM0/AS1A05_163T01_9000002820_18915cztM0_level2_quad_clean.evt
Size (bytes)709,381,44091,707,840
Size676.5 MB 87.5 MB
Events in quadrant A10,807,211452,171
Events in quadrant B3,830,241646,132
Events in quadrant C3,246,161626,373
Events in quadrant D3,166,706605,408

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0365042
B0156824
C0137832
D0137302

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6395345053.948397%
B63942303.597122%
C63951492.329945%
D6395340.531665%

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 8545 6397 2571 2571 30.09% 40.19%
B 8544 6396 86 86 1.01% 1.34%
C 8545 6397 0 0 0.00% 0.00%
D 8545 6397 0 0 0.00% 0.00%

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 14 235 8617659 76211.93 555 544 113.1
A 15 174 52688 461.17 555 544 113.1
A 13 254 6143 49.52 555 544 113.1
B 3 112 427649 2817.82 792 773 151.5
B 4 216 108802 713.1 792 773 151.5
B 7 220 67265 438.92 792 773 151.5
C 3 233 149257 832.86 764 770 178.3
C 14 238 118941 662.82 764 770 178.3
C 13 61 5402 25.98 764 770 178.3
D 7 238 177382 930.58 769 746 189.8
D 12 110 34571 178.2 769 746 189.8
D 2 234 29807 153.1 769 746 189.8

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