ASTROSAT CZTI

Data Quality Report

Orbit 58271

Creation date: 2026-07-05T23:25:54.567561
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_044T03_9000006588_58271cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58271cztM0_level2_quad_clean.evt
Size (bytes)732,075,84091,103,040
Size698.2 MB 86.9 MB
Events in quadrant A4,226,085663,113
Events in quadrant B9,382,414397,620
Events in quadrant C4,417,343639,597
Events in quadrant D8,518,372558,833

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01462
B01462
C01462
D01460

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017919261
B033617787
C018990488
D031027650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71731752.439704%
B7146327145.773860%
C7164811.130653%
D715772110.074053%

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 7238 7194 132 132 1.82% 1.83%
B 7196 7147 1600 1600 22.23% 22.39%
C 7237 7191 87 87 1.20% 1.21%
D 7227 7180 667 667 9.23% 9.29%

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 12 114 902646 4725.74 763 742 190.8
A 8 249 151494 789.9 763 742 190.8
A 4 249 58446 302.35 763 742 190.8
B 6 255 4534035 41217.55 512 495 110.0
B 2 249 1751019 15915.23 512 495 110.0
B 3 238 720109 6542.51 512 495 110.0
C 6 223 1217372 5934.51 744 736 205.0
C 15 198 120719 585.25 744 736 205.0
C 12 252 28904 137.4 744 736 205.0
D 12 110 4674765 22588.0 723 690 206.9
D 3 224 370973 1789.43 723 690 206.9
D 3 12 94861 455.09 723 690 206.9

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