ASTROSAT CZTI

Data Quality Report

Orbit 55695

Creation date: 2026-01-15T12:22:33.493313
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_099T04_9000006540_55695cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55695cztM0_level2_quad_clean.evt
Size (bytes)548,559,36090,190,080
Size523.1 MB 86.0 MB
Events in quadrant A4,159,265580,978
Events in quadrant B2,981,934657,880
Events in quadrant C6,958,449518,737
Events in quadrant D5,694,230513,682

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172991
B0137021
C0255051
D0215931

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65914627.009558%
B65911311.987559%
C6591113017.144591%
D659270810.740291%

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 7456 6592 349 349 4.68% 5.29%
B 7456 6592 11 11 0.15% 0.17%
C 7456 6591 1238 1238 16.60% 18.78%
D 7457 6592 628 628 8.42% 9.53%

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 12 115 683943 4071.22 682 666 167.8
A 7 64 347213 2064.86 682 666 167.8
A 0 8 244053 1450.19 682 666 167.8
B 4 206 141042 950.66 683 656 147.7
B 7 252 46687 311.71 683 656 147.7
B 4 190 29853 197.71 683 656 147.7
C 9 38 3956352 22442.24 643 638 176.3
C 13 3 123920 699.42 643 638 176.3
C 12 249 106934 603.06 643 638 176.3
D 11 129 3070486 16699.37 647 618 183.8
D 7 129 45166 242.33 647 618 183.8
D 5 173 43944 235.68 647 618 183.8

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