ASTROSAT CZTI

Data Quality Report

Orbit 55745

Creation date: 2026-01-17T11:22:56.423528
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_099T04_9000006540_55745cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55745cztM0_level2_quad_clean.evt
Size (bytes)1,981,313,280232,053,120
Size1.8 GB 221.3 MB
Events in quadrant A31,507,953933,939
Events in quadrant B10,337,8851,847,754
Events in quadrant C15,126,2481,498,437
Events in quadrant D14,919,8661,450,651

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010645812
B0442404
C0576034
D0578554

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03820
B03820
C03820
D03820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18781898847.856877%
B187822751.464168%
C18782192110.227878%
D1878215268.124800%

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 19926 18785 7685 7685 38.57% 40.91%
B 19927 18788 99 99 0.50% 0.53%
C 19927 18787 1116 1116 5.60% 5.94%
D 19927 18788 1404 1404 7.05% 7.47%

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 15 32 20625570 56578.48 1479 1446 364.5
A 12 115 1978135 5422.68 1479 1446 364.5
A 8 249 1171114 3208.77 1479 1446 364.5
B 4 206 1464156 3466.69 1953 1875 421.8
B 7 0 999997 2366.29 1953 1875 421.8
B 4 169 66009 152.04 1953 1875 421.8
C 15 199 2716507 5466.81 1816 1795 496.6
C 9 38 2525733 5082.64 1816 1795 496.6
C 15 164 1129394 2270.73 1816 1795 496.6
D 11 129 6338878 12098.74 1872 1794 523.8
D 2 31 296532 562.71 1872 1794 523.8
D 8 245 242891 460.3 1872 1794 523.8

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