ASTROSAT CZTI

Data Quality Report

Orbit 20200211_A07_091T04_9000003492_level2

Creation date: 2021-08-30T19:14:44.347841
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/AS1A07_091T04_9000003492cztM0_level2_bc.evt modeM0/AS1A07_091T04_9000003492cztM0_level2_quad_clean.evt
Size (bytes)1,181,416,320460,304,640
Size1.1 GB 439.0 MB
Events in quadrant A7,003,4782,932,639
Events in quadrant B9,192,0103,013,374
Events in quadrant C6,962,5952,903,742
Events in quadrant D10,330,0742,787,690

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630
B0630
C0630
D0630

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0691610
B0768500
C0700780
D0823310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06840
B06840
C06840
D06840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A335443250.968877%
B335428122.420846%
C335445311.582995%
D3354410703.189840%

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 45471 33546 0 0 0.00% 0.00%
B 45471 33539 43 43 0.09% 0.13%
C 45471 33544 0 0 0.00% 0.00%
D 45471 33541 53 53 0.12% 0.16%

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 13 254 51206 125.69 1814 1782 393.2
A 0 226 11440 24.56 1814 1782 393.2
A 12 194 11094 23.68 1814 1782 393.2
B 0 229 915255 2646.77 1841 1802 345.1
B 0 189 642636 1856.85 1841 1802 345.1
B 3 64 384039 1107.55 1841 1802 345.1
C 7 247 123829 294.35 1762 1754 414.7
C 3 233 44763 103.7 1762 1754 414.7
C 10 9 17554 38.1 1762 1754 414.7
D 9 85 1478098 3590.09 1767 1708 411.2
D 1 52 1109005 2692.58 1767 1708 411.2
D 12 233 378846 917.07 1767 1708 411.2

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