ASTROSAT CZTI

Data Quality Report

Orbit 55683

Creation date: 2026-01-15T13:17:10.474712
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_55683cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55683cztM0_level2_quad_clean.evt
Size (bytes)597,467,520104,567,040
Size569.8 MB 99.7 MB
Events in quadrant A6,117,930679,142
Events in quadrant B3,419,026745,432
Events in quadrant C3,610,445674,960
Events in quadrant D8,376,893535,520

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02356511
B01620828
C0166950
D03029063

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76383484.556167%
B7626480.629426%
C7642480.628108%
D7628136217.855270%

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 7642 7641 254 254 3.32% 3.32%
B 7642 7636 34 34 0.44% 0.45%
C 7643 7643 41 41 0.54% 0.54%
D 7643 7637 1233 1233 16.13% 16.15%

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 12 115 1475212 7666.67 773 752 192.3
A 7 64 922336 4791.91 773 752 192.3
A 0 8 368348 1911.37 773 752 192.3
B 5 172 136272 820.29 773 744 165.2
B 0 173 97032 582.79 773 744 165.2
B 7 252 28806 169.85 773 744 165.2
C 9 38 122012 578.48 762 754 209.6
C 12 252 118009 559.38 762 754 209.6
C 10 19 115226 546.1 762 754 209.6
D 11 129 4169517 20962.92 702 669 198.9
D 8 245 455858 2288.9 702 669 198.9
D 10 181 364968 1831.87 702 669 198.9

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