ASTROSAT CZTI

Data Quality Report

Orbit 51835

Creation date: 2025-04-28T20:16:06.304397
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/AS1C09_011T05_9000006466_51835cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51835cztM0_level2_quad_clean.evt
Size (bytes)851,178,24095,981,760
Size811.7 MB 91.5 MB
Events in quadrant A6,650,468649,888
Events in quadrant B6,540,553706,514
Events in quadrant C7,142,953594,296
Events in quadrant D10,601,930439,591

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248210
B0245652
C0263190
D0366340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74065517.439914%
B74065557.493924%
C740688511.949770%
D7406244132.959762%

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 7406 7406 489 489 6.60% 6.60%
B 7406 7406 390 390 5.27% 5.27%
C 7406 7406 770 770 10.40% 10.40%
D 7406 7406 2118 2118 28.60% 28.60%

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 11 3 878410 4577.45 764 744 191.7
A 12 3 755578 3936.82 764 744 191.7
A 13 248 594020 3094.22 764 744 191.7
B 10 128 845180 5253.13 753 726 160.8
B 5 32 654908 4069.49 753 726 160.8
B 5 185 612100 3803.2 753 726 160.8
C 0 193 1118759 5585.37 724 715 200.2
C 0 176 987574 4930.02 724 715 200.2
C 15 157 276639 1378.42 724 715 200.2
D 11 129 3331791 18610.62 638 615 179.0
D 8 176 1426519 7966.24 638 615 179.0
D 7 60 1021355 5702.67 638 615 179.0

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