ASTROSAT CZTI

Data Quality Report

Orbit 20170820_A03_052T01_9000001480_level2

Creation date: 2025-11-16T20:42:13.599964
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/AS1A03_052T01_9000001480cztM0_level2.fits modeM0/AS1A03_052T01_9000001480cztM0_level2_quad_clean.evt
Size (bytes)690,785,280656,326,080
Size658.8 MB 625.9 MB
Events in quadrant A4,210,9683,920,590
Events in quadrant B3,981,8723,837,400
Events in quadrant C4,126,6073,732,226
Events in quadrant D3,663,8623,453,880

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012620
B012680
C012670
D012670

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01508430
B01593290
C01493190
D01878860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01150
B01150
C01150
D01150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A721696630.918677%
B7133911611.627441%
C727334110.565080%
D7441414421.937807%

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 91195 77556 0 0 0.00% 0.00%
B 91195 76909 0 0 0.00% 0.00%
C 91195 77814 0 0 0.00% 0.00%
D 91195 77564 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 4108 11.37 1093 1024 271.2
A 7 110 3457 8.97 1093 1024 271.2
A 0 30 3226 8.12 1093 1024 271.2
B 2 9 3487 11.87 1051 1000 209.6
B 5 128 2703 8.13 1051 1000 209.6
B 3 17 2686 8.04 1051 1000 209.6
C 1 80 3033 7.05 1090 1014 286.3
C 1 81 2988 6.9 1090 1014 286.3
C 12 241 2868 6.48 1090 1014 286.3
D 3 14 2671 6.15 1045 951 279.9
D 6 231 2617 5.95 1045 951 279.9
D 7 5 2613 5.94 1045 951 279.9

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