ASTROSAT CZTI

Data Quality Report

Orbit 57681

Creation date: 2026-05-27T06:06:39.027958
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_125T09_9000006578_57681cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57681cztM0_level2_quad_clean.evt
Size (bytes)432,362,88095,826,240
Size412.3 MB 91.4 MB
Events in quadrant A2,840,550638,533
Events in quadrant B3,505,425670,628
Events in quadrant C4,602,917581,583
Events in quadrant D4,544,440552,416

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134432
B0151672
C0183282
D0180562

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6570260.395738%
B65702183.318113%
C65703665.570776%
D65703455.251142%

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 7600 6571 3 3 0.04% 0.05%
B 7600 6570 90 90 1.18% 1.37%
C 7600 6571 337 337 4.43% 5.13%
D 7600 6571 343 343 4.51% 5.22%

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 28699 158.43 710 692 176.8
A 4 95 26016 143.25 710 692 176.8
A 10 251 18585 101.22 710 692 176.8
B 10 16 231596 1567.84 693 668 147.3
B 5 185 218476 1478.77 693 668 147.3
B 4 80 160046 1082.07 693 668 147.3
C 15 224 1366873 7455.54 670 660 183.2
C 12 254 236969 1289.56 670 660 183.2
C 12 252 171126 930.25 670 660 183.2
D 8 160 783508 4091.4 670 638 191.3
D 8 240 765634 3997.99 670 638 191.3
D 2 120 153759 800.23 670 638 191.3

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