ASTROSAT CZTI

Data Quality Report

Orbit 20200216_A07_027T06_9000003508_level2

Creation date: 2025-12-09T09:25:53.790249
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_027T06_9000003508cztM0_level2.fits modeM0/AS1A07_027T06_9000003508cztM0_level2_quad_clean.evt
Size (bytes)398,335,680240,647,040
Size379.9 MB 229.5 MB
Events in quadrant A2,490,7801,199,545
Events in quadrant B2,370,0261,197,671
Events in quadrant C2,438,1201,165,854
Events in quadrant D2,092,7041,049,904

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07900
B07900
C07900
D07900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0810
B0810
C0810
D0810

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0807120
B0918650
C0830960
D01012440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A389212480.637188%
B389219292.386886%
C389215861.505614%
D3892111733.013797%

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 46951 38918 0 0 0.00% 0.00%
B 46951 38886 0 0 0.00% 0.00%
C 46951 38918 0 0 0.00% 0.00%
D 46951 38913 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 2362 11.11 647 610 157.7
A 7 110 2040 9.07 647 610 157.7
A 0 30 1880 8.05 647 610 157.7
B 2 9 1841 9.99 628 600 124.2
B 5 128 1612 8.15 628 600 124.2
B 3 17 1524 7.44 628 600 124.2
C 1 80 1897 7.89 643 603 164.0
C 1 81 1895 7.88 643 603 164.0
C 12 241 1732 6.89 643 603 164.0
D 4 246 1586 6.52 596 543 159.9
D 6 231 1561 6.37 596 543 159.9
D 3 14 1536 6.21 596 543 159.9

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