ASTROSAT CZTI

Data Quality Report

Orbit 20210926_A09_108T02_9000004706_level2

Creation date: 2025-12-29T09:01:18.624875
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/AS1A09_108T02_9000004706cztM0_level2.fits modeM0/AS1A09_108T02_9000004706cztM0_level2_quad_clean.evt
Size (bytes)481,659,840434,128,320
Size459.3 MB 414.0 MB
Events in quadrant A3,041,3222,636,767
Events in quadrant B2,855,3622,694,677
Events in quadrant C2,747,1122,146,212
Events in quadrant D2,594,4702,324,022

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09920
B09920
C09920
D09920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0730
B0730
C0730
D0740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01023300
B01581890
C01547900
D01233570

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A487375001.025915%
B4873719303.960030%
C48737808716.593143%
D487379251.897942%

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 66688 48738 0 0 0.00% 0.00%
B 66688 48737 0 0 0.00% 0.00%
C 66688 48727 0 0 0.00% 0.00%
D 66688 48729 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 2972 11.15 794 744 199.8
A 0 30 2334 7.96 794 744 199.8
A 7 110 2333 7.95 794 744 199.8
B 2 9 2333 10.74 753 717 150.5
B 5 232 1901 7.87 753 717 150.5
B 5 128 1897 7.84 753 717 150.5
C 1 80 2180 8.19 726 681 183.1
C 1 81 2117 7.84 726 681 183.1
C 9 209 1928 6.81 726 681 183.1
D 6 67 1832 5.87 741 675 197.1
D 3 14 1832 5.87 741 675 197.1
D 6 231 1823 5.82 741 675 197.1

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