ASTROSAT CZTI

Data Quality Report

Orbit 20877

Creation date: 2024-06-27T18:20:39.689688
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/AS1A06_002T03_9000003080_20877cztM0_level2.evt modeM0/AS1A06_002T03_9000003080_20877cztM0_level2_quad_clean.evt
Size (bytes)508,429,440101,053,440
Size484.9 MB 96.4 MB
Events in quadrant A3,391,450656,456
Events in quadrant B3,932,857654,385
Events in quadrant C3,389,059638,384
Events in quadrant D4,202,651616,959

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0146932
B0161812
C0146882
D0171402

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70941261.776149%
B70951932.720226%
C70951502.114165%
D70951692.381959%

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 7224 7096 0 0 0.00% 0.00%
B 7225 7098 20 20 0.28% 0.28%
C 7225 7098 0 0 0.00% 0.00%
D 7225 7098 86 86 1.19% 1.21%

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 5 98 16930 90.73 877 859 177.1
A 0 226 7770 39.02 877 859 177.1
A 3 137 7202 35.81 877 859 177.1
B 7 220 203868 1215.65 869 847 167.0
B 0 197 81874 485.17 869 847 167.0
B 0 189 70329 416.05 869 847 167.0
C 14 238 129838 657.86 833 839 196.1
C 13 61 5711 24.85 833 839 196.1
C 10 91 4852 20.47 833 839 196.1
D 1 52 421996 2016.28 845 819 208.9
D 1 20 214513 1023.01 845 819 208.9
D 13 153 147192 700.73 845 819 208.9

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