ASTROSAT CZTI

Data Quality Report

Orbit 55819

Creation date: 2026-01-22T01:53:43.675831
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_127T10_9000006542_55819cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55819cztM0_level2_quad_clean.evt
Size (bytes)507,816,00087,822,720
Size484.3 MB 83.8 MB
Events in quadrant A3,904,499612,666
Events in quadrant B2,739,996661,462
Events in quadrant C3,069,633587,247
Events in quadrant D8,586,657352,407

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162181
B0134951
C0144431
D0302071

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63842473.869048%
B6384610.955514%
C63851061.660141%
D6385236337.008614%

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 7214 6385 189 189 2.62% 2.96%
B 7214 6385 16 16 0.22% 0.25%
C 7215 6386 85 85 1.18% 1.33%
D 7214 6385 2290 2290 31.74% 35.87%

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 8 249 647075 4009.19 635 621 161.2
A 0 8 181169 1119.73 635 621 161.2
A 8 192 174615 1079.08 635 621 161.2
B 5 185 84122 604.83 636 614 138.1
B 0 213 53617 383.89 636 614 138.1
B 5 172 45640 326.11 636 614 138.1
C 13 3 263413 1514.07 626 620 173.6
C 12 4 225867 1297.75 626 620 173.6
C 15 200 37085 210.09 626 620 173.6
D 2 62 3971610 29210.97 470 447 135.9
D 3 12 1926663 14168.81 470 447 135.9
D 11 129 670804 4930.99 470 447 135.9

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