ASTROSAT CZTI

Data Quality Report

Orbit 56809

Creation date: 2026-03-29T14:12:18.253936
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/AS1A14_083T03_9000006562_56809cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56809cztM0_level2_quad_clean.evt
Size (bytes)551,736,00089,956,800
Size526.2 MB 85.8 MB
Events in quadrant A3,470,883629,404
Events in quadrant B7,275,733530,411
Events in quadrant C5,398,626546,437
Events in quadrant D3,768,526560,347

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143501
B0261961
C0207931
D0158321

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6560751.143293%
B6559168025.613661%
C655977011.739594%
D65591942.957768%

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 7504 6560 22 22 0.29% 0.34%
B 7503 6559 1304 1304 17.38% 19.88%
C 7504 6560 765 765 10.19% 11.66%
D 7504 6560 184 184 2.45% 2.80%

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 3 14 516835 2940.21 712 695 175.5
A 10 251 129634 734.51 712 695 175.5
A 14 235 30668 170.74 712 695 175.5
B 4 206 1469160 10832.26 626 603 135.6
B 2 249 1228776 9059.16 626 603 135.6
B 8 128 1211822 8934.11 626 603 135.6
C 15 230 2496805 13577.36 672 665 183.8
C 14 96 208077 1128.18 672 665 183.8
C 12 252 22613 119.38 672 665 183.8
D 2 249 671380 3426.66 689 657 195.7
D 8 240 110429 560.81 689 657 195.7
D 6 239 94789 480.91 689 657 195.7

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