ASTROSAT CZTI

Data Quality Report

Orbit 01254

Creation date: 2024-06-27T14:09:54.792725
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/AS1G04_011T02_9000000226_01254cztM0_level2.evt modeM0/AS1G04_011T02_9000000226_01254cztM0_level2_quad_clean.evt
Size (bytes)1,195,102,080100,408,320
Size1.1 GB 95.8 MB
Events in quadrant A7,890,374683,100
Events in quadrant B8,815,569666,579
Events in quadrant C7,891,671652,729
Events in quadrant D11,154,907572,896

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0281882
B0308871
C0282021
D0380701

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6667300.449978%
B6667751.124944%
C6667230.344983%
D6667138720.803960%

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 7607 6667 176 176 2.31% 2.64%
B 7606 6666 390 390 5.13% 5.85%
C 7606 6666 137 137 1.80% 2.06%
D 7607 6667 2072 2072 27.24% 31.08%

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 4 32 23090 42.68 2046 2058 492.7
A 11 79 9883 15.88 2046 2058 492.7
A 13 9 9180 14.45 2046 2058 492.7
B 8 4 256038 501.77 2134 2140 506.0
B 12 52 206943 404.75 2134 2140 506.0
B 15 22 70402 134.9 2134 2140 506.0
C 15 241 298012 554.92 1917 1983 533.5
C 9 52 41452 73.99 1917 1983 533.5
C 3 111 28587 49.87 1917 1983 533.5
D 10 84 2665243 5209.74 1647 1703 511.3
D 13 169 2053831 4013.85 1647 1703 511.3
D 2 88 101350 194.9 1647 1703 511.3

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