ASTROSAT CZTI

Data Quality Report

Orbit 20161231_A02_174T04_9000000938_level2

Creation date: 2025-11-09T00:38:32.047767
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/AS1A02_174T04_9000000938cztM0_level2.fits modeM0/AS1A02_174T04_9000000938cztM0_level2_quad_clean.evt
Size (bytes)1,155,072,9601,123,876,800
Size1.1 GB 1.0 GB
Events in quadrant A6,982,7466,654,838
Events in quadrant B6,736,0466,650,733
Events in quadrant C6,902,9826,373,802
Events in quadrant D5,877,8625,878,699

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01920
B01920
C01920
D01920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02610650
B02667250
C02716250
D03157120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A025260
B025260
C025260
D025260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12372514831.198626%
B12372924551.984175%
C12373117711.431331%
D12372839173.165815%

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 155948 123737 0 0 0.00% 0.00%
B 155948 123736 0 0 0.00% 0.00%
C 155948 123741 0 0 0.00% 0.00%
D 155948 123638 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 14 188 6886 11.28 1813 1686 461.1
A 0 29 6739 10.96 1813 1686 461.1
A 14 204 5991 9.34 1813 1686 461.1
B 2 9 5865 11.66 1779 1690 358.0
B 12 226 4678 8.35 1779 1690 358.0
B 3 17 4598 8.12 1779 1690 358.0
C 1 80 5113 7.11 1826 1694 481.2
C 1 81 4991 6.85 1826 1694 481.2
C 12 241 4838 6.53 1826 1694 481.2
D 3 14 4398 6.38 1680 1521 451.1
D 6 231 4246 6.04 1680 1521 451.1
D 11 82 4144 5.81 1680 1521 451.1

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