ASTROSAT CZTI

Data Quality Report

Orbit 56851

Creation date: 2026-04-01T11:26:42.986173
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_083T03_9000006562_56851cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56851cztM0_level2_quad_clean.evt
Size (bytes)411,226,56093,041,280
Size392.2 MB 88.7 MB
Events in quadrant A3,677,983605,658
Events in quadrant B4,162,327620,144
Events in quadrant C2,887,670587,847
Events in quadrant D3,986,543548,294

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157391
B0170622
C0135091
D0163881

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65231872.866779%
B65235248.033114%
C6523320.490572%
D65231732.652154%

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 7438 6524 110 110 1.48% 1.69%
B 7438 6523 329 329 4.42% 5.04%
C 7438 6524 4 4 0.05% 0.06%
D 7438 6524 132 132 1.77% 2.02%

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 636054 3720.79 692 674 170.8
A 10 251 295207 1724.79 692 674 170.8
A 3 14 26870 153.4 692 674 170.8
B 5 185 937610 6492.82 666 642 144.3
B 10 16 197794 1366.19 666 642 144.3
B 4 141 157378 1086.12 666 642 144.3
C 12 250 73583 389.88 685 676 187.0
C 14 254 56299 297.45 685 676 187.0
C 12 252 14396 73.37 685 676 187.0
D 8 240 742730 3953.02 671 641 187.7
D 2 249 354731 1886.2 671 641 187.7
D 3 176 57669 303.78 671 641 187.7

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