ASTROSAT CZTI

Data Quality Report

Orbit 20201102_A09_038T33_9000003970_level2

Creation date: 2021-01-07T15:10:27.901467
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_038T33_9000003970cztM0_level2_bc.evt modeM0/AS1A09_038T33_9000003970cztM0_level2_quad_clean.evt
Size (bytes)380,989,440153,319,680
Size363.3 MB 146.2 MB
Events in quadrant A2,040,6341,027,869
Events in quadrant B2,196,6981,068,957
Events in quadrant C2,071,4121,023,398
Events in quadrant D4,632,655922,011

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182580
B0189150
C0188010
D0283090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8663260.300127%
B8663480.554081%
C8663860.992728%
D86637348.472815%

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 11348 8663 0 0 0.00% 0.00%
B 11348 8663 0 0 0.00% 0.00%
C 11348 8663 0 0 0.00% 0.00%
D 11348 8663 222 222 1.96% 2.56%

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 14117 120.66 524 518 112.7
A 13 254 13821 118.04 524 518 112.7
A 0 226 3325 24.91 524 518 112.7
B 3 64 32501 315.84 540 532 101.2
B 0 230 27692 268.33 540 532 101.2
B 4 52 20298 195.28 540 532 101.2
C 10 22 21458 169.62 520 520 123.4
C 14 67 14585 113.94 520 520 123.4
C 2 16 13957 108.85 520 520 123.4
D 1 52 1558754 13848.27 496 482 112.5
D 6 112 886664 7875.45 496 482 112.5
D 7 80 181621 1609.77 496 482 112.5

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