ASTROSAT CZTI

Data Quality Report

Orbit 55531

Creation date: 2026-01-21T19:49:41.680884
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_099T01_9000006536_55531cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55531cztM0_level2_quad_clean.evt
Size (bytes)368,112,96094,953,600
Size351.1 MB 90.6 MB
Events in quadrant A3,198,247620,306
Events in quadrant B3,279,461654,386
Events in quadrant C3,221,789593,088
Events in quadrant D3,417,486551,533

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143332
B0146372
C0144662
D0150592

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6539781.192843%
B65392113.226793%
C6539540.825814%
D65391442.202172%

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 7589 6540 29 29 0.38% 0.44%
B 7589 6540 128 128 1.69% 1.96%
C 7589 6540 31 31 0.41% 0.47%
D 7589 6540 89 89 1.17% 1.36%

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 4 205 349259 2042.32 694 676 170.7
A 0 8 31537 180.81 694 676 170.7
A 11 31 24268 138.22 694 676 170.7
B 5 236 298568 2037.03 679 654 146.2
B 10 245 135266 920.43 679 654 146.2
B 0 199 44825 302.03 679 654 146.2
C 15 178 319131 1750.46 669 660 181.9
C 9 38 135780 742.68 669 660 181.9
C 13 3 67290 366.23 669 660 181.9
D 11 129 186314 985.22 665 637 188.5
D 2 153 123160 650.12 665 637 188.5
D 7 70 111603 588.8 665 637 188.5

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