ASTROSAT CZTI

Data Quality Report

Orbit 20210421_A10_050T05_9000004330_level2

Creation date: 2021-04-23T16:41:32.048725
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A10_050T05_9000004330cztM0_level2_bc.evt modeM0/AS1A10_050T05_9000004330cztM0_level2_quad_clean.evt
Size (bytes)2,460,700,800733,224,960
Size2.3 GB 699.3 MB
Events in quadrant A12,335,0674,742,102
Events in quadrant B29,469,5404,704,142
Events in quadrant C11,466,7674,588,091
Events in quadrant D17,606,5164,499,061

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010940
B010940
C010940
D010940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01030
B01030
C01030
D01030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01137070
B01715860
C01132990
D01311690

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A535684880.910992%
B5356817723.307945%
C5356810161.896655%
D5356819283.599164%

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 63933 53571 14 14 0.02% 0.03%
B 63933 53568 211 211 0.33% 0.39%
C 63933 53567 0 0 0.00% 0.00%
D 63933 53569 321 321 0.50% 0.60%

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 13 675656 1053.59 2989 2941 638.5
A 8 192 113768 173.57 2989 2941 638.5
A 13 254 94759 143.8 2989 2941 638.5
B 6 159 14945945 26776.99 2970 2902 558.1
B 0 229 2304869 4124.98 2970 2902 558.1
B 0 190 491282 875.15 2970 2902 558.1
C 3 233 160127 234.05 2875 2873 671.9
C 2 114 103183 149.3 2875 2873 671.9
C 14 254 97752 141.22 2875 2873 671.9
D 13 104 2626564 3883.55 2904 2832 675.6
D 8 195 1193210 1761.95 2904 2832 675.6
D 7 238 502914 740.2 2904 2832 675.6

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