ASTROSAT CZTI

Data Quality Report

Orbit 20180205_A04_044T01_9000001882_level2

Creation date: 2025-11-19T08:10:00.137628
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/AS1A04_044T01_9000001882cztM0_level2.fits modeM0/AS1A04_044T01_9000001882cztM0_level2_quad_clean.evt
Size (bytes)615,329,280597,072,960
Size586.8 MB 569.4 MB
Events in quadrant A3,769,8003,555,411
Events in quadrant B3,511,0723,376,032
Events in quadrant C3,685,5143,516,831
Events in quadrant D3,211,7623,179,713

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01589140
B01708610
C01445360
D01678600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01050
C01050
D01050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013220
B013220
C013220
D013220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6494513672.104858%
B6494549277.586419%
C6494515102.325044%
D6494521373.290477%

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 75444 64943 0 0 0.00% 0.00%
B 75444 64712 0 0 0.00% 0.00%
C 75444 64745 0 0 0.00% 0.00%
D 75444 64937 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 3749 11.64 979 917 243.4
A 0 29 3629 11.14 979 917 243.4
A 14 204 3144 9.15 979 917 243.4
B 2 9 3063 11.76 927 883 185.4
B 3 17 2325 7.78 927 883 185.4
B 14 254 2305 7.67 927 883 185.4
C 12 241 2594 6.7 972 902 252.5
C 3 126 2481 6.25 972 902 252.5
C 2 191 2444 6.11 972 902 252.5
D 3 14 2431 6.48 916 831 247.1
D 6 231 2364 6.2 916 831 247.1
D 7 5 2261 5.79 916 831 247.1

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