ASTROSAT CZTI

Data Quality Report

Orbit 57800

Creation date: 2026-06-04T06:13:45.064037
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_083T16_9000006580_57800cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57800cztM0_level2_quad_clean.evt
Size (bytes)657,495,36088,997,760
Size627.0 MB 84.9 MB
Events in quadrant A3,531,872638,319
Events in quadrant B5,136,661674,190
Events in quadrant C10,516,820396,478
Events in quadrant D4,657,654539,650

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151682
B0197702
C0356822
D0184502

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63911442.253169%
B63913174.960100%
C6392263841.270338%
D63924647.259074%

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 8796 6393 105 105 1.19% 1.64%
B 8796 6392 106 106 1.21% 1.66%
C 8797 6393 2486 2486 28.26% 38.89%
D 8796 6393 474 474 5.39% 7.41%

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 546495 3248.9 681 664 168.0
A 10 251 285690 1696.54 681 664 168.0
A 3 128 30391 176.94 681 664 168.0
B 4 80 1936319 13667.2 675 650 141.6
B 0 171 102962 722.4 675 650 141.6
B 10 247 90899 637.22 675 650 141.6
C 9 38 5516296 36156.62 554 548 152.6
C 15 224 2171926 14233.73 554 548 152.6
C 12 252 570246 3734.46 554 548 152.6
D 12 0 932104 5107.37 636 606 182.4
D 2 249 595850 3263.7 636 606 182.4
D 8 160 315739 1727.86 636 606 182.4

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