ASTROSAT CZTI

Data Quality Report

Orbit 55954

Creation date: 2026-02-05T20:31:45.229156
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_066T02_9000006546_55954cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55954cztM0_level2_quad_clean.evt
Size (bytes)482,437,44092,632,320
Size460.1 MB 88.3 MB
Events in quadrant A4,207,085619,463
Events in quadrant B3,423,769673,241
Events in quadrant C3,213,563583,673
Events in quadrant D6,511,869477,197

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172202
B0146192
C0146093
D0238742

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64602043.157895%
B6460811.253870%
C64591382.136554%
D6459106616.504103%

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 7630 6461 161 161 2.11% 2.49%
B 7630 6461 45 45 0.59% 0.70%
C 7629 6460 84 84 1.10% 1.30%
D 7629 6460 975 975 12.78% 15.09%

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 7 64 603090 3551.16 680 664 169.6
A 12 115 501260 2950.89 680 664 169.6
A 3 14 263141 1547.24 680 664 169.6
B 0 231 170469 1181.33 681 659 143.7
B 0 171 135535 938.3 681 659 143.7
B 4 21 106478 736.16 681 659 143.7
C 1 29 225816 1218.0 666 659 184.9
C 15 193 218922 1180.71 666 659 184.9
C 15 219 50329 268.69 666 659 184.9
D 11 129 3896349 22388.83 606 580 174.0
D 3 12 49968 283.83 606 580 174.0
D 5 173 45874 260.3 606 580 174.0

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