ASTROSAT CZTI

Data Quality Report

Orbit 55649

Creation date: 2026-01-21T20:38:09.513956
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_021T06_9000006538_55649cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55649cztM0_level2_quad_clean.evt
Size (bytes)483,482,88088,934,400
Size461.1 MB 84.8 MB
Events in quadrant A8,289,944443,422
Events in quadrant B2,773,192670,843
Events in quadrant C2,835,480586,146
Events in quadrant D3,497,425543,526

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0291912
B0132492
C0135232
D0153362

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6433196030.467900%
B6433490.761697%
C6433340.528525%
D64321872.907338%

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 7608 6435 1924 1924 25.29% 29.90%
B 7608 6435 10 10 0.13% 0.16%
C 7608 6435 12 12 0.16% 0.19%
D 7607 6434 131 131 1.72% 2.04%

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 12 115 5499645 38512.22 574 560 142.8
A 3 14 281400 1966.83 574 560 142.8
A 8 249 47799 330.83 574 560 142.8
B 0 171 43067 299.17 660 636 141.8
B 5 248 29151 201.05 660 636 141.8
B 10 247 28750 198.22 660 636 141.8
C 6 223 124171 707.24 641 634 174.7
C 9 38 52598 297.49 641 634 174.7
C 13 3 47477 268.17 641 634 174.7
D 11 129 235685 1306.14 631 602 180.0
D 2 31 228142 1264.23 631 602 180.0
D 2 249 217723 1206.34 631 602 180.0

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