ASTROSAT CZTI

Data Quality Report

Orbit 20161119_A02_085T02_9000000808_level2

Creation date: 2025-11-07T20:37:48.438150
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/AS1A02_085T02_9000000808cztM0_level2.fits modeM0/AS1A02_085T02_9000000808cztM0_level2_quad_clean.evt
Size (bytes)672,030,720707,955,840
Size640.9 MB 675.2 MB
Events in quadrant A4,044,2684,279,213
Events in quadrant B3,854,9944,184,417
Events in quadrant C4,018,3444,168,393
Events in quadrant D3,451,0303,827,402

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014940
B014880
C014960
D014740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01525300
B01703050
C01496710
D01684190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A726947481.028971%
B7258223313.211540%
C726755380.740282%
D7254710531.451473%

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 86645 73714 0 0 0.00% 0.00%
B 86645 73634 0 0 0.00% 0.00%
C 86645 73730 0 0 0.00% 0.00%
D 86645 73624 0 0 0.00% 0.00%

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 14 188 3983 11.18 1050 981 268.4
A 0 29 3965 11.12 1050 981 268.4
A 7 110 3552 9.58 1050 981 268.4
B 2 9 3440 12.05 1018 971 204.9
B 12 226 2776 8.81 1018 971 204.9
B 14 254 2720 8.54 1018 971 204.9
C 1 81 3117 7.58 1061 984 281.5
C 1 80 3098 7.51 1061 984 281.5
C 12 241 2801 6.45 1061 984 281.5
D 11 82 2589 6.45 983 893 262.9
D 3 14 2586 6.44 983 893 262.9
D 6 231 2583 6.43 983 893 262.9

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