ASTROSAT CZTI

Data Quality Report

Orbit 20210201_A10_064T02_9000004146_level2

Creation date: 2021-02-03T10:38:29.735411
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_064T02_9000004146cztM0_level2_bc.evt modeM0/AS1A10_064T02_9000004146cztM0_level2_quad_clean.evt
Size (bytes)2,558,888,640466,032,960
Size2.4 GB 444.4 MB
Events in quadrant A7,637,3323,040,348
Events in quadrant B7,524,4813,107,600
Events in quadrant C23,313,3052,886,620
Events in quadrant D36,542,6082,573,163

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0758260
B0757510
C01279690
D01651540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07440
B07440
C07440
D07440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A364705111.401152%
B364705981.639704%
C3646933649.224273%
D364691153031.615893%

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 40550 36472 0 0 0.00% 0.00%
B 40550 36471 0 0 0.00% 0.00%
C 40550 36472 77 77 0.19% 0.21%
D 40550 36471 8575 8575 21.15% 23.51%

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 14 235 238469 577.37 1873 1834 409.9
A 13 254 66836 158.6 1873 1834 409.9
A 15 169 39355 91.55 1873 1834 409.9
B 10 245 63703 169.55 1897 1847 364.8
B 5 255 46289 121.82 1897 1847 364.8
B 0 230 39617 103.53 1897 1847 364.8
C 3 233 16246460 38853.77 1765 1752 418.1
C 15 208 122816 289.56 1765 1752 418.1
C 2 114 70418 164.23 1765 1752 418.1
D 8 195 25573002 68367.59 1615 1559 374.0
D 1 52 4300356 11493.23 1615 1559 374.0
D 2 234 146910 388.61 1615 1559 374.0

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