ASTROSAT CZTI

Data Quality Report

Orbit 20200626_A09_006T04_9000003738_level2

Creation date: 2021-01-10T07:16:14.022935
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/AS1A09_006T04_9000003738cztM0_level2_bc.evt modeM0/AS1A09_006T04_9000003738cztM0_level2_quad_clean.evt
Size (bytes)700,819,200224,452,800
Size668.4 MB 214.1 MB
Events in quadrant A5,353,5591,425,887
Events in quadrant B4,362,9951,466,004
Events in quadrant C4,088,9551,363,497
Events in quadrant D6,192,3091,307,074

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0426530
B0385480
C0382770
D0448440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03660
B03660
C03660
D03660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0460
B0460
C0460
D0460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17932550.306714%
B17932700.390364%
C179321630.908990%
D179322251.254740%

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 21842 17933 0 0 0.00% 0.00%
B 21842 17932 1 1 0.00% 0.01%
C 21842 17933 3 3 0.01% 0.02%
D 21842 17932 35 35 0.16% 0.20%

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 8 192 1108826 4755.32 1090 1074 233.0
A 13 254 25377 104.33 1090 1074 233.0
A 12 96 25373 104.31 1090 1074 233.0
B 0 245 51107 244.8 1110 1087 204.3
B 3 112 25966 121.76 1110 1087 204.3
B 0 229 25062 117.34 1110 1087 204.3
C 5 112 63173 261.2 1028 1026 237.9
C 3 233 58208 240.33 1028 1026 237.9
C 1 16 12326 47.49 1028 1026 237.9
D 1 52 1460107 6267.8 1033 999 232.8
D 8 195 639616 2743.27 1033 999 232.8
D 13 104 84577 359.02 1033 999 232.8

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