ASTROSAT CZTI

Data Quality Report

Orbit 59172

Creation date: 2026-09-04T14:37:42.156628
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/AS1T05_271T01_9000006604_59172cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59172cztM0_level2_quad_clean.evt
Size (bytes)416,309,76078,399,360
Size397.0 MB 74.8 MB
Events in quadrant A2,623,198543,947
Events in quadrant B3,317,313551,753
Events in quadrant C2,627,447523,990
Events in quadrant D6,392,412349,628

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0196717300
B0229868965
C0198507462
D04235919722

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A1140297812248616140295106723886
B1-1-1
C1-1-1
D1-1-1

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019276
B018773
C019573
D019470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6004110.183211%
B58241212.077610%
C5989140.233762%
D521987616.784825%

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 7187 6710 6 6 0.08% 0.09%
B 7189 6619 60 60 0.83% 0.91%
C 9878 6685 6 6 0.06% 0.09%
D 7188 6113 864 864 12.02% 14.13%

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 10 251 81622 506.71 648 631 159.8
A 15 233 18304 110.57 648 631 159.8
A 3 14 10358 60.86 648 631 159.8
B 4 171 535293 3976.65 617 594 134.5
B 5 185 157155 1164.37 617 594 134.5
B 10 128 110084 814.3 617 594 134.5
C 12 250 95787 553.25 625 619 172.0
C 12 252 36999 211.49 625 619 172.0
C 14 254 25947 147.24 625 619 172.0
D 12 110 2655286 18665.22 500 478 142.2
D 2 31 925349 6502.51 500 478 142.2
D 11 129 364692 2560.69 500 478 142.2

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

TCT plots

Parameter TCT0 TCT_healed
Tct