ASTROSAT CZTI

Data Quality Report

Orbit 20170926_A03_071T01_9000001562_level2

Creation date: 2025-11-17T08:53:16.575198
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_071T01_9000001562cztM0_level2.fits modeM0/AS1A03_071T01_9000001562cztM0_level2_quad_clean.evt
Size (bytes)474,747,840449,233,920
Size452.8 MB 428.4 MB
Events in quadrant A2,852,2542,591,569
Events in quadrant B2,674,1902,503,659
Events in quadrant C2,929,8932,692,993
Events in quadrant D2,503,4082,402,961

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01329940
B01448900
C01032030
D01294300

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010300
B010480
C010500
D010300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5017233016.579367%
B4875644299.084010%
C496844830.972144%
D4994718813.765992%

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 61554 51157 0 0 0.00% 0.00%
B 61554 49492 0 0 0.00% 0.00%
C 61554 50783 0 0 0.00% 0.00%
D 61554 51019 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 2606 10.34 742 695 184.8
A 7 110 2325 8.82 742 695 184.8
A 0 30 2142 7.83 742 695 184.8
B 2 9 2286 11.45 705 673 140.9
B 5 128 1796 7.97 705 673 140.9
B 3 17 1788 7.91 705 673 140.9
C 1 80 2186 7.3 773 722 200.6
C 1 81 2109 6.91 773 722 200.6
C 2 191 1959 6.17 773 722 200.6
D 3 14 1860 6.34 714 651 190.6
D 6 231 1826 6.17 714 651 190.6
D 7 3 1806 6.06 714 651 190.6

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