ASTROSAT CZTI

Data Quality Report

Orbit 20200930_T03_236T01_9000003908_level2

Creation date: 2025-12-15T11:02:17.093724
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/AS1T03_236T01_9000003908cztM0_level2.fits modeM0/AS1T03_236T01_9000003908cztM0_level2_quad_clean.evt
Size (bytes)483,255,360401,362,560
Size460.9 MB 382.8 MB
Events in quadrant A2,972,2122,269,275
Events in quadrant B2,850,6762,276,567
Events in quadrant C3,030,1242,336,746
Events in quadrant D2,576,9642,067,039

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01177640
B01186920
C01001040
D01378490

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09520
B09520
C09520
D09520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4668014213.044130%
B4668025815.529135%
C466807601.628106%
D4668027265.839760%

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 56590 46679 0 0 0.00% 0.00%
B 56590 46673 0 0 0.00% 0.00%
C 56590 46680 0 0 0.00% 0.00%
D 56589 46644 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 2468 9.29 775 730 187.1
A 7 110 2412 8.99 775 730 187.1
A 14 95 2179 7.75 775 730 187.1
B 2 9 2304 10.63 754 723 148.8
B 5 255 1916 8.02 754 723 148.8
B 3 17 1909 7.97 754 723 148.8
C 12 241 2036 6.35 801 757 201.4
C 3 187 2029 6.31 801 757 201.4
C 3 126 2025 6.29 801 757 201.4
D 10 189 1914 6.35 736 675 195.2
D 3 14 1841 5.97 736 675 195.2
D 6 231 1806 5.79 736 675 195.2

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