ASTROSAT CZTI

Data Quality Report

Orbit 57228

Creation date: 2026-04-30T15:34:54.145347
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_070T08_9000006568_57228cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57228cztM0_level2_quad_clean.evt
Size (bytes)1,677,216,960353,632,320
Size1.6 GB 337.3 MB
Events in quadrant A10,604,4432,356,308
Events in quadrant B12,755,5722,494,697
Events in quadrant C24,532,9192,010,175
Events in quadrant D12,249,3232,119,633

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05080
B05080
C05080
D05080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0510793
B0561563
C0906033
D0549363

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A250923201.275307%
B250938573.415295%
C25093375114.948392%
D250934201.673774%

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 26657 25096 14 14 0.05% 0.06%
B 26658 25097 255 255 0.96% 1.02%
C 26658 25097 2674 2674 10.03% 10.65%
D 26658 25097 177 177 0.66% 0.71%

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 10 251 53898 77.45 2691 2617 662.1
A 13 254 39327 55.45 2691 2617 662.1
A 3 14 36373 50.98 2691 2617 662.1
B 10 16 878692 1571.62 2627 2519 557.5
B 5 185 374847 667.86 2627 2519 557.5
B 4 201 330799 588.85 2627 2519 557.5
C 15 224 10437605 15629.01 2465 2437 667.7
C 12 254 3573496 5348.47 2465 2437 667.7
C 12 252 323479 480.83 2465 2437 667.7
D 3 12 768388 1047.39 2606 2494 731.2
D 5 173 207484 280.33 2606 2494 731.2
D 2 31 170645 229.95 2606 2494 731.2

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