ASTROSAT CZTI

Data Quality Report

Orbit 20170813_A03_039T01_9000001462_level2

Creation date: 2025-11-16T17:25:29.588616
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_039T01_9000001462cztM0_level2.fits modeM0/AS1A03_039T01_9000001462cztM0_level2_quad_clean.evt
Size (bytes)632,724,480657,987,840
Size603.4 MB 627.5 MB
Events in quadrant A3,963,7384,223,153
Events in quadrant B3,826,1824,249,873
Events in quadrant C3,904,9424,156,891
Events in quadrant D2,661,2622,504,359

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014180
B014180
C014200
D014200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520980
B01545400
C01434240
D03347230

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6993113551.937624%
B6993810371.482742%
C699384830.690612%
D698442637637.764160%

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 81393 69979 0 0 0.00% 0.00%
B 81393 69982 0 0 0.00% 0.00%
C 81393 69981 0 0 0.00% 0.00%
D 81392 69811 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 3900 11.41 1030 965 257.1
A 7 110 3233 8.82 1030 965 257.1
A 0 30 3050 8.11 1030 965 257.1
B 2 9 3309 11.89 1009 964 197.3
B 14 254 2610 8.34 1009 964 197.3
B 5 128 2602 8.3 1009 964 197.3
C 1 80 2982 7.49 1032 958 270.1
C 1 81 2858 7.03 1032 958 270.1
C 12 241 2759 6.67 1032 958 270.1
D 6 231 1975 6.29 760 691 204.0
D 3 14 1956 6.2 760 691 204.0
D 6 67 1882 5.83 760 691 204.0

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