ASTROSAT CZTI

Data Quality Report

Orbit 57142

Creation date: 2026-04-21T01:48:20.389200
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_083T10_9000006566_57142cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57142cztM0_level2_quad_clean.evt
Size (bytes)491,290,56084,539,520
Size468.5 MB 80.6 MB
Events in quadrant A2,725,567579,566
Events in quadrant B5,216,282535,979
Events in quadrant C3,315,217544,204
Events in quadrant D6,457,040475,689

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0126391
B0195451
C0145311
D0234311

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6074330.543299%
B607587514.403292%
C60751692.781893%
D60755969.810700%

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 7033 6073 6 6 0.09% 0.10%
B 7034 6075 752 752 10.69% 12.38%
C 7034 6075 132 132 1.88% 2.17%
D 7034 6075 642 642 9.13% 10.57%

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 14 150080 930.22 649 631 160.7
A 5 113 40668 249.2 649 631 160.7
A 13 254 11255 66.13 649 631 160.7
B 10 16 2632930 20573.39 587 566 127.9
B 0 199 138400 1077.25 587 566 127.9
B 4 171 45517 351.32 587 566 127.9
C 15 198 568298 3356.37 620 614 169.1
C 9 237 132121 777.52 620 614 169.1
C 14 254 57996 339.27 620 614 169.1
D 12 33 1747264 10250.43 597 568 170.4
D 15 142 1722283 10103.83 597 568 170.4
D 2 249 186172 1089.21 597 568 170.4

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