ASTROSAT CZTI

Data Quality Report

Orbit 20220418_A11_068T03_9000005076_level2

Creation date: 2026-01-02T10:43:08.747958
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/AS1A11_068T03_9000005076cztM0_level2.fits modeM0/AS1A11_068T03_9000005076cztM0_level2_quad_clean.evt
Size (bytes)386,159,040338,630,400
Size368.3 MB 322.9 MB
Events in quadrant A2,419,9722,059,488
Events in quadrant B2,188,0121,766,360
Events in quadrant C2,323,6441,933,110
Events in quadrant D2,009,0201,742,883

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08180
B08180
C08180
D08180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0828620
B01413130
C0920130
D0991810

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01630
B01630
C01630
D01630

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A40087720.179609%
B40087497112.400529%
C400877341.831018%
D4008711102.768977%

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 56340 40087 0 0 0.00% 0.00%
B 56340 40079 0 0 0.00% 0.00%
C 56340 40081 0 0 0.00% 0.00%
D 56340 40067 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 7 110 2078 9.58 631 593 155.0
A 9 19 1949 8.75 631 593 155.0
A 0 29 1924 8.59 631 593 155.0
B 2 9 1891 11.63 579 554 114.9
B 3 80 1562 8.77 579 554 114.9
B 5 128 1534 8.53 579 554 114.9
C 1 81 1904 8.4 614 575 158.3
C 1 80 1850 8.05 614 575 158.3
C 3 234 1621 6.61 614 575 158.3
D 6 231 1463 6.06 574 523 155.0
D 6 38 1462 6.06 574 523 155.0
D 7 3 1418 5.77 574 523 155.0

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