ASTROSAT CZTI

Data Quality Report

Orbit 27492

Creation date: 2024-06-27T19:40:36.738071
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1T03_249T01_9000003934_27492cztM0_level2.evt modeM0/AS1T03_249T01_9000003934_27492cztM0_level2_quad_clean.evt
Size (bytes)587,770,56093,453,120
Size560.5 MB 89.1 MB
Events in quadrant A3,714,085590,978
Events in quadrant B5,275,318584,915
Events in quadrant C3,738,435564,657
Events in quadrant D4,555,868559,045

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157890
B0204180
C0158470
D0186120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A76131942.548273%
B761376210.009195%
C76132353.086825%
D76122433.192328%

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 7728 7613 0 0 0.00% 0.00%
B 7728 7613 459 459 5.94% 6.03%
C 7728 7613 1 1 0.01% 0.01%
D 7727 7612 86 86 1.11% 1.13%

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 13 254 12809 60.69 961 940 195.6
A 3 137 9398 43.25 961 940 195.6
A 0 226 8220 37.22 961 940 195.6
B 3 64 1632475 9205.86 910 886 177.2
B 0 230 22856 123.96 910 886 177.2
B 12 111 22203 120.28 910 886 177.2
C 14 238 143397 657.25 914 918 216.8
C 2 16 27632 123.23 914 918 216.8
C 13 61 6311 24.88 914 918 216.8
D 1 52 656483 2939.29 927 900 223.0
D 7 69 155707 694.07 927 900 223.0
D 2 250 83718 371.31 927 900 223.0

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