ASTROSAT CZTI

Data Quality Report

Orbit 20190220_A06_006T01_9000002724_level2

Creation date: 2025-11-27T22:20:04.274392
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/AS1A06_006T01_9000002724cztM0_level2.fits modeM0/AS1A06_006T01_9000002724cztM0_level2_quad_clean.evt
Size (bytes)1,016,496,000976,973,760
Size969.4 MB 931.7 MB
Events in quadrant A6,242,1065,874,837
Events in quadrant B6,005,0125,836,946
Events in quadrant C6,136,8385,673,441
Events in quadrant D5,283,1205,087,272

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02183460
B02279020
C02295530
D02661360

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021080
B021080
C021080
D021080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01690
B01690
C01690
D01690

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A10385314781.423165%
B10385320201.945057%
C10385326662.567090%
D10385342334.075954%

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 120283 103853 0 0 0.00% 0.00%
B 120283 103848 0 0 0.00% 0.00%
C 120283 103849 0 0 0.00% 0.00%
D 120283 103845 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 5927 11.18 1625 1525 393.6
A 7 110 5106 9.1 1625 1525 393.6
A 0 30 4806 8.34 1625 1525 393.6
B 2 9 4846 10.6 1591 1514 314.4
B 2 8 3987 7.87 1591 1514 314.4
B 5 128 3955 7.76 1591 1514 314.4
C 12 241 4264 6.67 1620 1512 412.4
C 2 191 4096 6.27 1620 1512 412.4
C 3 126 4083 6.23 1620 1512 412.4
D 10 190 3927 6.39 1509 1371 400.1
D 6 231 3822 6.13 1509 1371 400.1
D 3 14 3817 6.11 1509 1371 400.1

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