ASTROSAT CZTI

Data Quality Report

Orbit 55244

Creation date: 2025-12-14T07:27:43.343525
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_009T01_9000006534_55244cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55244cztM0_level2_quad_clean.evt
Size (bytes)537,802,56093,651,840
Size512.9 MB 89.3 MB
Events in quadrant A4,181,514602,369
Events in quadrant B5,365,126625,021
Events in quadrant C5,182,465583,822
Events in quadrant D4,660,874559,270

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0174822
B0207152
C0200772
D0185662

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66713825.726278%
B667172310.837955%
C66723985.965228%
D66722774.151679%

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 8906 6673 318 318 3.57% 4.77%
B 8906 6673 643 643 7.22% 9.64%
C 8907 6674 344 344 3.86% 5.15%
D 8907 6674 262 262 2.94% 3.93%

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 1125471 6742.01 681 664 166.8
A 12 3 174373 1041.2 681 664 166.8
A 3 14 40955 241.5 681 664 166.8
B 5 185 2107678 14545.96 675 649 144.9
B 2 249 437190 3013.67 675 649 144.9
B 5 172 38740 262.96 675 649 144.9
C 12 254 1033306 5542.16 674 666 186.3
C 1 16 689779 3698.46 674 666 186.3
C 12 249 278038 1488.65 674 666 186.3
D 8 160 893687 4664.82 674 644 191.4
D 11 129 513640 2679.64 674 644 191.4
D 5 38 279070 1454.36 674 644 191.4

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