ASTROSAT CZTI

Data Quality Report

Orbit 20181126_A05_004T03_9000002538_level2

Creation date: 2025-11-26T01:32:56.224963
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/AS1A05_004T03_9000002538cztM0_level2.fits modeM0/AS1A05_004T03_9000002538cztM0_level2_quad_clean.evt
Size (bytes)670,852,800595,733,760
Size639.8 MB 568.1 MB
Events in quadrant A4,109,9183,471,891
Events in quadrant B3,961,5583,476,581
Events in quadrant C3,990,6263,283,852
Events in quadrant D3,444,4142,998,758

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014340
B014340
C014340
D014340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01443060
B01481510
C01511310
D01657770

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A701327511.070838%
B701329201.311812%
C7013111701.668306%
D7013218022.569440%

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 81502 70126 0 0 0.00% 0.00%
B 81502 70126 0 0 0.00% 0.00%
C 81502 70131 0 0 0.00% 0.00%
D 81502 70082 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 0 29 3926 11.13 1067 1003 262.5
A 7 110 3288 8.7 1067 1003 262.5
A 0 30 3099 7.98 1067 1003 262.5
B 2 9 3194 10.58 1049 1001 207.4
B 2 8 2746 8.42 1049 1001 207.4
B 5 128 2632 7.87 1049 1001 207.4
C 1 81 2984 7.37 1053 984 271.3
C 1 80 2971 7.32 1053 984 271.3
C 12 241 2822 6.77 1053 984 271.3
D 3 14 2597 6.53 982 892 261.1
D 6 231 2508 6.19 982 892 261.1
D 7 3 2490 6.12 982 892 261.1

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