ASTROSAT CZTI

Data Quality Report

Orbit 20210901_A10_109T01_9000004682_level2

Creation date: 2025-12-28T17:24:51.226661
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/AS1A10_109T01_9000004682cztM0_level2.fits modeM0/AS1A10_109T01_9000004682cztM0_level2_quad_clean.evt
Size (bytes)951,969,600814,832,640
Size907.9 MB 777.1 MB
Events in quadrant A6,078,5404,969,713
Events in quadrant B5,591,2844,639,966
Events in quadrant C5,630,7444,503,067
Events in quadrant D5,052,0584,089,381

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01988300
B03157110
C02283950
D02806540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019180
B019180
C019180
D019180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9443610641.126689%
B9443856265.957348%
C9443861716.534446%
D9443840104.246172%

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 109999 94424 0 0 0.00% 0.00%
B 109999 94416 0 0 0.00% 0.00%
C 109999 94285 0 0 0.00% 0.00%
D 109999 94418 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 5976 11.57 1583 1493 387.4
A 0 30 4857 8.68 1583 1493 387.4
A 7 110 4846 8.66 1583 1493 387.4
B 2 9 4436 10.5 1476 1412 288.0
B 3 80 3648 7.76 1476 1412 288.0
B 5 232 3616 7.65 1476 1412 288.0
C 12 241 3878 6.61 1491 1400 374.5
C 3 126 3794 6.39 1491 1400 374.5
C 3 187 3759 6.3 1491 1400 374.5
D 4 246 3991 7.01 1437 1309 382.6
D 10 189 3660 6.15 1437 1309 382.6
D 15 47 3635 6.08 1437 1309 382.6

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