ASTROSAT CZTI

Data Quality Report

Orbit 55900

Creation date: 2026-01-30T15:53:36.708171
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_030T02_9000006544_55900cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55900cztM0_level2_quad_clean.evt
Size (bytes)429,065,280104,091,840
Size409.2 MB 99.3 MB
Events in quadrant A3,628,055675,702
Events in quadrant B3,361,650720,628
Events in quadrant C4,680,658619,891
Events in quadrant D3,634,040619,153

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165691
B0157821
C0196261
D0164611

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74241211.629849%
B74241952.626616%
C74234896.587633%
D7424560.754310%

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 7684 7425 90 90 1.17% 1.21%
B 7684 7425 15 15 0.20% 0.20%
C 7683 7424 394 394 5.13% 5.31%
D 7684 7425 53 53 0.69% 0.71%

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 64 237687 1253.09 774 751 189.1
A 12 115 226255 1192.63 774 751 189.1
A 3 14 92916 487.44 774 751 189.1
B 7 252 85594 511.38 769 737 165.9
B 0 213 74604 445.15 769 737 165.9
B 0 199 54321 322.92 769 737 165.9
C 15 199 1086587 5399.63 737 730 201.1
C 12 252 302426 1500.24 737 730 201.1
C 6 223 225328 1116.86 737 730 201.1
D 2 31 356611 1677.51 753 716 212.2
D 15 125 75930 354.52 753 716 212.2
D 8 160 66369 309.45 753 716 212.2

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