ASTROSAT CZTI

Data Quality Report

Orbit 57839

Creation date: 2026-06-06T23:54:00.756109
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_125T11_9000006582_57839cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57839cztM0_level2_quad_clean.evt
Size (bytes)2,995,159,680419,860,800
Size2.8 GB 400.4 MB
Events in quadrant A14,581,0053,006,617
Events in quadrant B17,083,5793,142,001
Events in quadrant C49,246,1271,836,052
Events in quadrant D27,516,0932,551,190

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06380
B06380
C06360
D06360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0673353
B0737783
C01683208
D01036183

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A316585221.648872%
B3165812053.806305%
C316571300841.090438%
D3165928448.983228%

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 37866 31662 205 205 0.54% 0.65%
B 37866 31662 635 635 1.68% 2.01%
C 37866 31661 10303 10303 27.21% 32.54%
D 37867 31663 2586 2586 6.83% 8.17%

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 973232 1165.62 3371 3287 832.1
A 3 245 351099 417.98 3371 3287 832.1
A 4 3 85082 98.3 3371 3287 832.1
B 2 249 1809878 2596.34 3291 3167 695.9
B 5 185 1046996 1500.04 3291 3167 695.9
B 10 247 334144 475.63 3291 3167 695.9
C 9 38 29284596 39927.58 2701 2663 733.4
C 15 224 7982464 10880.91 2701 2663 733.4
C 14 254 293681 396.82 2701 2663 733.4
D 12 110 9966645 11107.12 3187 3043 897.0
D 3 224 1040173 1156.16 3187 3043 897.0
D 8 160 947077 1052.38 3187 3043 897.0

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