ASTROSAT CZTI

Data Quality Report

Orbit 57831

Creation date: 2026-06-07T11:26:49.531863
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_083T16_9000006580_57831cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57831cztM0_level2_quad_clean.evt
Size (bytes)432,999,36076,377,600
Size412.9 MB 72.8 MB
Events in quadrant A2,502,790516,160
Events in quadrant B2,838,359545,648
Events in quadrant C6,515,006427,907
Events in quadrant D3,759,697450,891

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0114521
B0122701
C0230601
D0149681

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5304591.112368%
B53051542.902922%
C530594017.719133%
D53052314.354383%

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 6489 5305 27 27 0.42% 0.51%
B 6490 5306 85 85 1.31% 1.60%
C 6490 5306 737 737 11.36% 13.89%
D 6490 5306 172 172 2.65% 3.24%

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 10 251 206327 1477.51 561 546 139.3
A 3 245 63834 454.41 561 546 139.3
A 3 128 32004 225.87 561 546 139.3
B 4 158 413565 3474.85 552 530 118.9
B 5 185 50931 424.02 552 530 118.9
B 7 252 37841 313.9 552 530 118.9
C 9 38 3320296 23427.77 519 513 141.7
C 15 224 829950 5853.35 519 513 141.7
C 6 223 120353 845.71 519 513 141.7
D 12 110 815368 5301.47 539 515 153.7
D 8 240 290997 1889.89 539 515 153.7
D 3 12 114340 740.55 539 515 153.7

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