ASTROSAT CZTI

Data Quality Report

Orbit 20200506_A08_003T16_9000003650_level2

Creation date: 2025-12-10T22:08:01.268577
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/AS1A08_003T16_9000003650cztM0_level2.fits modeM0/AS1A08_003T16_9000003650cztM0_level2_quad_clean.evt
Size (bytes)459,593,280309,654,720
Size438.3 MB 295.3 MB
Events in quadrant A2,888,0501,657,576
Events in quadrant B2,779,6481,670,558
Events in quadrant C2,753,3621,546,717
Events in quadrant D2,427,0081,429,810

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09100
B09100
C09100
D09100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0939160
B0952130
C01087930
D01031270

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0730
B0730
C0730
D0730

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A447336671.491069%
B447337631.705676%
C4473312122.709409%
D447336731.504482%

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 52093 44732 0 0 0.00% 0.00%
B 52093 44732 0 0 0.00% 0.00%
C 52093 44733 0 0 0.00% 0.00%
D 52093 44731 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 0 29 2714 11.04 752 710 181.4
A 7 110 2368 9.14 752 710 181.4
A 9 19 2185 8.13 752 710 181.4
B 2 9 2256 10.63 735 703 146.0
B 2 8 1830 7.72 735 703 146.0
B 5 232 1814 7.61 735 703 146.0
C 1 81 2092 7.63 726 683 184.6
C 1 80 2074 7.53 726 683 184.6
C 3 126 1946 6.84 726 683 184.6
D 7 3 1725 6.02 691 630 182.0
D 10 189 1714 5.96 691 630 182.0
D 6 231 1698 5.87 691 630 182.0

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