ASTROSAT CZTI

Data Quality Report

Orbit 20180203_A04_130T04_9000001878_level2

Creation date: 2025-11-19T07:52:11.615413
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_130T04_9000001878cztM0_level2.fits modeM0/AS1A04_130T04_9000001878cztM0_level2_quad_clean.evt
Size (bytes)165,096,000166,386,240
Size157.4 MB 158.7 MB
Events in quadrant A986,728992,514
Events in quadrant B954,954995,211
Events in quadrant C1,000,246970,904
Events in quadrant D864,450886,894

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0472670
B0422210
C0359130
D0415220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0410
C0410
D0410

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03540
B03540
C03540
D03540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1730210496.062883%
B173028995.195931%
C173021070.618426%
D173025593.230840%

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 21373 17296 0 0 0.00% 0.00%
B 21373 17222 0 0 0.00% 0.00%
C 21373 17302 0 0 0.00% 0.00%
D 21372 17301 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 29 912 10.16 256 241 66.1
A 7 110 853 9.26 256 241 66.1
A 9 19 752 7.73 256 241 66.1
B 2 9 820 11.08 251 240 52.3
B 2 8 629 7.43 251 240 52.3
B 5 128 627 7.39 251 240 52.3
C 1 81 768 7.43 264 246 70.2
C 1 80 747 7.13 264 246 70.2
C 9 188 676 6.12 264 246 70.2
D 3 14 640 6.15 246 224 67.7
D 6 231 634 6.06 246 224 67.7
D 7 5 617 5.81 246 224 67.7

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