ASTROSAT CZTI

Data Quality Report

Orbit 20191126_A08_003T01_9000003342_level2

Creation date: 2025-12-06T12:07:15.214551
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/AS1A08_003T01_9000003342cztM0_level2.fits modeM0/AS1A08_003T01_9000003342cztM0_level2_quad_clean.evt
Size (bytes)1,110,070,0801,052,599,680
Size1.0 GB 1003.8 MB
Events in quadrant A6,853,9246,278,289
Events in quadrant B6,554,7126,337,401
Events in quadrant C6,734,0486,080,554
Events in quadrant D5,830,3705,538,403

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02326910
B02455450
C02348410
D02831910

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A022720
B022720
C022720
D022720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11154311010.987063%
B11154322402.008194%
C11154319651.761652%
D11154344944.028940%

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 127768 111524 0 0 0.00% 0.00%
B 127769 111523 0 0 0.00% 0.00%
C 127768 111521 0 0 0.00% 0.00%
D 127769 111452 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 0 29 6527 11.09 1780 1667 438.1
A 7 110 5468 8.68 1780 1667 438.1
A 0 30 5101 7.84 1780 1667 438.1
B 2 9 5302 10.85 1729 1647 336.7
B 2 8 4391 8.15 1729 1647 336.7
B 3 17 4310 7.91 1729 1647 336.7
C 3 234 4759 6.86 1779 1665 450.9
C 12 241 4569 6.44 1779 1665 450.9
C 3 235 4562 6.42 1779 1665 450.9
D 15 46 4177 6.1 1661 1518 435.6
D 3 14 4155 6.05 1661 1518 435.6
D 6 231 4087 5.9 1661 1518 435.6

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