ASTROSAT CZTI

Data Quality Report

Orbit 20220728_A11_024T01_9000005250_level2

Creation date: 2026-01-03T20:55:28.252567
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_024T01_9000005250cztM0_level2.fits modeM0/AS1A11_024T01_9000005250cztM0_level2_quad_clean.evt
Size (bytes)585,043,200557,280,000
Size557.9 MB 531.5 MB
Events in quadrant A3,593,8163,319,958
Events in quadrant B3,368,7023,229,756
Events in quadrant C3,472,4653,136,752
Events in quadrant D2,959,3262,869,006

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02550
B02540
C02540
D02550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012950
B012950
C012950
D013000

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01319250
B01598930
C01495590
D01743760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A630151350.214235%
B6297722633.593375%
C6294615232.419534%
D6294233825.373201%

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 90402 63458 0 0 0.00% 0.00%
B 90402 63337 0 0 0.00% 0.00%
C 90402 63368 0 0 0.00% 0.00%
D 90402 63321 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 2935 8.78 940 884 233.5
A 9 19 2919 8.71 940 884 233.5
A 0 29 2790 8.16 940 884 233.5
B 2 9 2859 11.54 891 853 173.9
B 3 80 2540 9.7 891 853 173.9
B 5 128 2414 8.98 891 853 173.9
C 1 81 2881 8.54 917 858 236.8
C 1 80 2726 7.89 917 858 236.8
C 3 203 2713 7.83 917 858 236.8
D 4 160 2211 6.32 847 772 227.5
D 10 113 2189 6.23 847 772 227.5
D 7 3 2184 6.2 847 772 227.5

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