ASTROSAT CZTI

Data Quality Report

Orbit 20200522_A07_018T07_9000003680_level2

Creation date: 2021-01-11T06:58:55.376647
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_018T07_9000003680cztM0_level2_bc.evt modeM0/AS1A07_018T07_9000003680cztM0_level2_quad_clean.evt
Size (bytes)2,607,672,960864,270,720
Size2.4 GB 824.2 MB
Events in quadrant A13,984,3465,540,563
Events in quadrant B14,367,7995,641,036
Events in quadrant C18,006,3115,407,145
Events in quadrant D28,289,7555,233,114

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012940
B012940
C012940
D012940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01344110
B01360840
C01499970
D01820460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A635306330.996380%
B635308161.284433%
C6353017442.745160%
D6353027954.399496%

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 74375 63524 22 22 0.03% 0.03%
B 74375 63519 7 7 0.01% 0.01%
C 74375 63523 206 206 0.28% 0.32%
D 74375 63521 895 895 1.20% 1.41%

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 15 174 204785 266.3 3541 3486 755.9
A 13 254 97072 123.81 3541 3486 755.9
A 8 205 58713 73.06 3541 3486 755.9
B 0 229 297544 439.11 3580 3498 669.6
B 3 64 204390 300.0 3580 3498 669.6
B 0 190 67803 96.03 3580 3498 669.6
C 7 247 3745607 4695.39 3422 3420 797.0
C 9 54 428006 532.74 3422 3420 797.0
C 0 239 287950 357.0 3422 3420 797.0
D 1 52 8671595 11030.17 3450 3341 785.9
D 8 195 3192040 4057.55 3450 3341 785.9
D 12 235 1917652 2435.92 3450 3341 785.9

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