ASTROSAT CZTI

Data Quality Report

Orbit 20180220_A04_112T01_9000001908_level2

Creation date: 2025-11-19T15:56:53.958615
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_112T01_9000001908cztM0_level2.fits modeM0/AS1A04_112T01_9000001908cztM0_level2_quad_clean.evt
Size (bytes)458,974,080438,402,240
Size437.7 MB 418.1 MB
Events in quadrant A2,831,2642,659,968
Events in quadrant B2,587,9122,459,203
Events in quadrant C2,797,6102,538,386
Events in quadrant D2,448,4802,386,374

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09600
B09600
C09600
D09600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01058320
B01195310
C01023550
D01099390

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A471118041.706608%
B4711141778.866294%
C4711110582.245760%
D4711110312.188449%

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 55226 47106 0 0 0.00% 0.00%
B 55226 46001 0 0 0.00% 0.00%
C 55226 47049 0 0 0.00% 0.00%
D 55226 47108 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 2649 10.71 739 697 182.3
A 7 110 2329 8.95 739 697 182.3
A 0 30 2116 7.78 739 697 182.3
B 2 9 2226 11.6 686 659 135.1
B 14 254 1727 7.91 686 659 135.1
B 5 255 1714 7.81 686 659 135.1
C 12 241 1887 6.25 740 693 191.1
C 2 191 1871 6.16 740 693 191.1
C 9 242 1847 6.04 740 693 191.1
D 10 189 1791 6.22 698 639 185.3
D 3 14 1765 6.08 698 639 185.3
D 6 231 1764 6.07 698 639 185.3

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