ASTROSAT CZTI

Data Quality Report

Orbit 20200917_A09_038T21_9000003882_level2

Creation date: 2021-01-08T07:00:20.579732
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_038T21_9000003882cztM0_level2_bc.evt modeM0/AS1A09_038T21_9000003882cztM0_level2_quad_clean.evt
Size (bytes)171,351,36076,308,480
Size163.4 MB 72.8 MB
Events in quadrant A1,754,855505,645
Events in quadrant B968,574531,349
Events in quadrant C815,728512,144
Events in quadrant D1,381,327490,813

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0109260
B085210
C079730
D096990

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0760
B0760
C0760
D0760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A38451634.239272%
B3845561.456437%
C3845330.858257%
D3845882.288687%

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 4970 3845 60 60 1.21% 1.56%
B 4970 3845 4 4 0.08% 0.10%
C 4970 3845 0 0 0.00% 0.00%
D 4970 3845 21 21 0.42% 0.55%

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 542954 11367.31 211 207 47.7
A 6 16 397657 8324.21 211 207 47.7
A 13 254 5943 120.14 211 207 47.7
B 10 246 60395 1399.07 218 214 43.0
B 3 64 44411 1027.48 218 214 43.0
B 0 190 11396 259.96 218 214 43.0
C 15 208 4419 81.8 210 210 51.5
C 13 61 1224 19.71 210 210 51.5
C 2 16 992 15.2 210 210 51.5
D 1 52 375477 7650.14 207 201 49.1
D 2 250 96990 1973.08 207 201 49.1
D 11 176 87125 1771.98 207 201 49.1

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