ASTROSAT CZTI

Data Quality Report

Orbit 20210318_A10_093T01_9000004266_level2

Creation date: 2021-03-25T08:50:45.131178
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_093T01_9000004266cztM0_level2_bc.evt modeM0/AS1A10_093T01_9000004266cztM0_level2_quad_clean.evt
Size (bytes)4,219,462,0801,205,680,320
Size3.9 GB 1.1 GB
Events in quadrant A20,263,3217,954,400
Events in quadrant B34,734,9588,035,510
Events in quadrant C19,657,4887,348,163
Events in quadrant D46,997,9456,999,831

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01907100
B02405720
C01978730
D02880720

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018280
B018280
C018280
D018280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9013817191.907076%
B9013832843.643302%
C9013863957.094677%
D9013875558.381593%

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 101978 90140 108 108 0.11% 0.12%
B 101978 90135 171 171 0.17% 0.19%
C 101978 90112 3 3 0.00% 0.00%
D 101978 90142 991 991 0.97% 1.10%

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 1416964 1366.4 4796 4715 1033.6
A 12 96 188195 177.52 4796 4715 1033.6
A 13 254 161000 151.21 4796 4715 1033.6
B 0 189 13965507 15002.31 4854 4736 930.6
B 4 171 529175 563.56 4854 4736 930.6
B 15 33 509406 542.32 4854 4736 930.6
C 3 233 1220468 1139.54 4496 4483 1067.1
C 14 254 718714 669.33 4496 4483 1067.1
C 15 208 178075 162.68 4496 4483 1067.1
D 7 80 11722700 11347.65 4523 4385 1032.7
D 12 33 6269572 6067.01 4523 4385 1032.7
D 8 195 4695527 4542.76 4523 4385 1032.7

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