ASTROSAT CZTI

Data Quality Report

Orbit 55784

Creation date: 2026-01-19T18:31:26.056138
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/AS1A14_127T10_9000006542_55784cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55784cztM0_level2_quad_clean.evt
Size (bytes)850,003,200100,661,760
Size810.6 MB 96.0 MB
Events in quadrant A10,661,380544,100
Events in quadrant B3,903,625803,823
Events in quadrant C3,521,219724,794
Events in quadrant D12,767,266426,515

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0371091
B0167031
C0166731
D0433761

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7884240830.542872%
B78851171.483830%
C7885290.367787%
D7885323941.077996%

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 7884 7884 2101 2101 26.65% 26.65%
B 7885 7885 0 0 0.00% 0.00%
C 7885 7885 24 24 0.30% 0.30%
D 7885 7885 3109 3109 39.43% 39.43%

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 15 32 5399948 29303.56 746 727 184.3
A 12 115 1377804 7473.9 746 727 184.3
A 7 64 440796 2388.42 746 727 184.3
B 5 172 386254 2069.69 860 828 186.2
B 7 252 29889 156.05 860 828 186.2
B 0 199 28529 148.75 860 828 186.2
C 12 250 142599 611.12 848 842 232.0
C 14 96 30847 129.35 848 842 232.0
C 6 223 29740 124.58 848 842 232.0
D 11 129 8488250 44154.76 680 650 192.2
D 8 245 959374 4987.54 680 650 192.2
D 7 70 319044 1656.37 680 650 192.2

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