ASTROSAT CZTI

Data Quality Report

Orbit 20171214_A04_164T01_9000001770_level2

Creation date: 2025-11-19T02:52:05.748595
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/AS1A04_164T01_9000001770cztM0_level2.fits modeM0/AS1A04_164T01_9000001770cztM0_level2_quad_clean.evt
Size (bytes)171,881,280108,820,800
Size163.9 MB 103.8 MB
Events in quadrant A1,047,510548,706
Events in quadrant B1,007,132538,974
Events in quadrant C1,044,950519,745
Events in quadrant D885,062465,971

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0386340
B0448440
C0362910
D0445960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03640
B03640
C03640
D03640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A177012021.141178%
B177017554.265296%
C17701620.350263%
D177014342.451839%

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 21521 17700 0 0 0.00% 0.00%
B 21521 17687 0 0 0.00% 0.00%
C 21520 17700 0 0 0.00% 0.00%
D 21521 17699 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 1021 10.84 273 256 70.6
A 7 110 831 8.15 273 256 70.6
A 0 30 779 7.41 273 256 70.6
B 2 9 921 12.11 266 254 55.1
B 5 128 676 7.66 266 254 55.1
B 2 8 671 7.57 266 254 55.1
C 1 81 751 6.71 275 258 73.4
C 1 80 734 6.48 275 258 73.4
C 12 241 729 6.41 275 258 73.4
D 3 14 661 6.39 252 231 67.3
D 7 5 650 6.22 252 231 67.3
D 3 159 629 5.91 252 231 67.3

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