ASTROSAT CZTI

Data Quality Report

Orbit 55478

Creation date: 2025-12-30T12:12:12.805532
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_55478cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55478cztM0_level2_quad_clean.evt
Size (bytes)420,500,16091,206,720
Size401.0 MB 87.0 MB
Events in quadrant A3,111,523605,600
Events in quadrant B3,181,809633,472
Events in quadrant C3,879,186554,813
Events in quadrant D4,899,547525,172

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01302
C01302
D01302

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014109239
B014510252
C016788334
D019600675

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6352590.928841%
B63481692.662256%
C63442944.634300%
D63263525.564338%

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 6943 6366 18 18 0.26% 0.28%
B 6962 6362 78 78 1.12% 1.23%
C 7000 6364 234 234 3.34% 3.68%
D 7002 6335 321 321 4.58% 5.07%

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 3 78 156041 928.72 674 658 167.3
A 12 115 136899 814.31 674 658 167.3
A 4 3 64815 383.47 674 658 167.3
B 5 248 180932 1270.18 663 638 141.9
B 4 206 109270 765.32 663 638 141.9
B 10 247 64618 450.74 663 638 141.9
C 9 38 633623 3539.76 652 643 178.8
C 13 3 589185 3291.25 652 643 178.8
C 12 252 32567 178.53 652 643 178.8
D 11 129 1598277 8761.33 647 620 182.4
D 5 113 165872 906.22 647 620 182.4
D 6 239 130840 714.11 647 620 182.4

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