ASTROSAT CZTI

Data Quality Report

Orbit 20220101_A11_046T03_9000004834_level2

Creation date: 2025-12-31T04:16:42.797650
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/AS1A11_046T03_9000004834cztM0_level2.fits modeM0/AS1A11_046T03_9000004834cztM0_level2_quad_clean.evt
Size (bytes)372,873,600358,153,920
Size355.6 MB 341.6 MB
Events in quadrant A2,254,2002,009,851
Events in quadrant B2,150,4522,128,790
Events in quadrant C2,260,4282,120,199
Events in quadrant D1,901,6461,863,427

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01390
B01390
C01390
D01390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0927710
B0993170
C0882820
D01331730

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08140
B08140
C08140
D08140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3965721535.429054%
B3965717074.304410%
C396573320.837179%
D3965622405.648578%

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 57504 39651 0 0 0.00% 0.00%
B 57504 39647 0 0 0.00% 0.00%
C 57504 39650 0 0 0.00% 0.00%
D 57504 39640 0 0 0.00% 0.00%

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 7 110 1856 8.83 589 553 147.6
A 0 29 1807 8.49 589 553 147.6
A 9 19 1777 8.29 589 553 147.6
B 2 9 1981 12.77 569 544 112.5
B 3 80 1744 10.66 569 544 112.5
B 2 8 1560 9.03 569 544 112.5
C 1 81 1914 8.85 596 561 152.9
C 1 80 1909 8.82 596 561 152.9
C 3 202 1758 7.83 596 561 152.9
D 4 160 1455 6.57 544 498 145.6
D 7 3 1372 6.0 544 498 145.6
D 10 113 1370 5.99 544 498 145.6

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