ASTROSAT CZTI

Data Quality Report

Orbit 20200816_A09_127T02_9000003818_level2

Creation date: 2021-01-09T05:18:25.460110
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_127T02_9000003818cztM0_level2_bc.evt modeM0/AS1A09_127T02_9000003818cztM0_level2_quad_clean.evt
Size (bytes)1,675,313,280545,742,720
Size1.6 GB 520.5 MB
Events in quadrant A8,432,3083,565,859
Events in quadrant B10,262,7223,565,921
Events in quadrant C12,309,4153,401,973
Events in quadrant D17,065,4733,309,929

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0816310
B0900690
C0973090
D01148580

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07980
B07980
C07980
D07980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A391163981.017486%
B3911611722.996216%
C3911617554.486655%
D3911625536.526741%

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 46761 39116 14 14 0.03% 0.04%
B 46761 39116 60 60 0.13% 0.15%
C 46761 39116 100 100 0.21% 0.26%
D 46761 39117 339 339 0.72% 0.87%

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 15 192 96975 207.05 2133 2101 458.2
A 13 254 66794 141.19 2133 2101 458.2
A 0 13 63205 133.35 2133 2101 458.2
B 5 172 1224014 3046.01 2141 2096 401.2
B 0 244 357720 886.5 2141 2096 401.2
B 0 230 90588 220.59 2141 2096 401.2
C 2 16 2164243 4416.2 2047 2042 489.6
C 3 233 2088268 4261.03 2047 2042 489.6
C 4 254 75197 149.42 2047 2042 489.6
D 1 52 7075854 14994.73 2048 1994 471.8
D 12 233 664664 1404.69 2048 1994 471.8
D 7 80 571394 1206.98 2048 1994 471.8

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