ASTROSAT CZTI

Data Quality Report

Orbit 55449

Creation date: 2025-12-28T02:16:52.714545
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_099T01_9000006536_55449cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55449cztM0_level2_quad_clean.evt
Size (bytes)421,957,44055,128,960
Size402.4 MB 52.6 MB
Events in quadrant A2,388,382412,210
Events in quadrant B2,453,347423,983
Events in quadrant C1,873,063387,505
Events in quadrant D8,568,480142,347

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0924
B0924
C0926
D0924

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011050633
B011276720
C09779773
D0311712801

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A43431082.486760%
B43382034.679576%
C4322150.347062%
D4216272364.587287%

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 7728 4394 82 82 1.06% 1.87%
B 7731 4396 145 145 1.88% 3.30%
C 7726 4388 11 11 0.14% 0.25%
D 7714 4230 2611 2611 33.85% 61.73%

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 0 8 312461 2778.38 447 435 112.3
A 3 78 265136 2356.98 447 435 112.3
A 8 249 31101 273.06 447 435 112.3
B 0 171 475746 5139.57 438 423 92.5
B 10 247 102883 1107.88 438 423 92.5
B 7 252 38338 409.97 438 423 92.5
C 13 3 73094 587.22 444 439 123.7
C 15 147 24774 196.68 444 439 123.7
C 14 254 11241 87.31 444 439 123.7
D 2 62 5908732 77972.21 263 251 75.8
D 6 239 370876 4891.01 263 251 75.8
D 3 12 331164 4366.95 263 251 75.8

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