ASTROSAT CZTI

Data Quality Report

Orbit 20200626_A09_006T05_9000003736_level2

Creation date: 2021-01-10T07:26:57.349260
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_006T05_9000003736cztM0_level2_bc.evt modeM0/AS1A09_006T05_9000003736cztM0_level2_quad_clean.evt
Size (bytes)297,380,160100,563,840
Size283.6 MB 95.9 MB
Events in quadrant A2,059,822644,664
Events in quadrant B1,701,398643,269
Events in quadrant C1,561,433614,169
Events in quadrant D3,137,078593,931

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01640
C01600
D01620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0140
D0330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0178850
B0166760
C0164430
D0210390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79261311.652788%
B78961331.684397%
C79221642.070184%
D78653634.615385%

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 8759 7758 0 0 0.00% 0.00%
B 8759 7737 1 1 0.01% 0.01%
C 8759 7756 0 0 0.00% 0.00%
D 8759 7725 110 110 1.26% 1.42%

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 8 192 441673 4742.41 417 408 93.0
A 13 254 11692 121.27 417 408 93.0
A 6 16 8429 86.2 417 408 93.0
B 0 245 38259 458.94 417 407 82.5
B 0 190 26779 319.75 417 407 82.5
B 10 247 11519 134.73 417 407 82.5
C 3 233 24682 253.91 397 393 95.7
C 2 16 8959 89.55 397 393 95.7
C 13 61 2310 20.04 397 393 95.7
D 1 52 1053557 10264.17 396 382 102.6
D 8 195 338222 3292.56 396 382 102.6
D 12 233 58455 565.98 396 382 102.6

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