ASTROSAT CZTI

Data Quality Report

Orbit 20200524_A07_171T02_9000003686_level2

Creation date: 2021-01-11T06:41:34.521317
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/AS1A07_171T02_9000003686cztM0_level2_bc.evt modeM0/AS1A07_171T02_9000003686cztM0_level2_quad_clean.evt
Size (bytes)1,539,253,440583,784,640
Size1.4 GB 556.7 MB
Events in quadrant A8,293,8633,800,798
Events in quadrant B13,898,8093,766,919
Events in quadrant C9,586,3543,672,928
Events in quadrant D12,018,4633,605,411

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08420
B07200
C08440
D08440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0843810
B01044670
C0889350
D0939180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A414003020.729469%
B4141724986.031340%
C414008071.949275%
D414074701.135074%

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 45724 41423 0 0 0.00% 0.00%
B 45724 41438 350 350 0.77% 0.84%
C 45724 41413 47 47 0.10% 0.11%
D 45724 41441 23 23 0.05% 0.06%

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 13 254 63633 130.44 2147 2106 471.7
A 0 226 13627 24.42 2147 2106 471.7
A 12 194 13191 23.5 2147 2106 471.7
B 3 64 5348158 13137.39 2118 2068 406.9
B 0 189 122939 297.03 2118 2068 406.9
B 0 190 104718 252.25 2118 2068 406.9
C 7 247 1398881 2856.98 2060 2051 488.9
C 3 233 178466 360.83 2060 2051 488.9
C 7 220 42204 82.13 2060 2051 488.9
D 8 195 1840151 3699.9 2110 2035 496.8
D 12 233 772097 1550.04 2110 2035 496.8
D 1 52 490807 983.84 2110 2035 496.8

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