ASTROSAT CZTI

Data Quality Report

Orbit 56800

Creation date: 2026-03-29T00:23:29.504421
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_56800cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56800cztM0_level2_quad_clean.evt
Size (bytes)513,558,72086,529,600
Size489.8 MB 82.5 MB
Events in quadrant A3,205,132594,614
Events in quadrant B6,270,000527,561
Events in quadrant C5,248,094523,150
Events in quadrant D3,792,941531,328

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144161
B0230941
C0202221
D0157551

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63551372.155783%
B6356134021.082442%
C635667210.572687%
D63561672.627439%

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 7145 6356 124 124 1.74% 1.95%
B 7146 6356 1047 1047 14.65% 16.47%
C 7146 6357 721 721 10.09% 11.34%
D 7146 6356 186 186 2.60% 2.93%

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 4 249 297686 1796.35 668 648 165.4
A 10 251 265668 1602.72 668 648 165.4
A 3 62 17730 103.3 668 648 165.4
B 4 206 3223856 24731.03 606 583 130.3
B 5 172 204600 1565.35 606 583 130.3
B 8 128 184908 1414.26 606 583 130.3
C 13 3 1349137 7951.87 616 608 169.6
C 15 230 1287274 7587.08 616 608 169.6
C 9 38 86133 504.32 616 608 169.6
D 2 249 870534 4858.05 637 608 179.1
D 8 160 94677 525.32 637 608 179.1
D 2 31 92129 511.09 637 608 179.1

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