ASTROSAT CZTI

Data Quality Report

Orbit 55652

Creation date: 2026-01-21T21:25:51.227603
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_021T06_9000006538_55652cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55652cztM0_level2_quad_clean.evt
Size (bytes)467,490,24099,907,200
Size445.8 MB 95.3 MB
Events in quadrant A5,396,285618,232
Events in quadrant B2,989,870710,777
Events in quadrant C3,147,693627,318
Events in quadrant D5,217,686572,743

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210206
B0146402
C0151272
D0205692

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71165567.813378%
B71161321.854975%
C7116670.941540%
D71163534.960652%

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 7741 7117 254 254 3.28% 3.57%
B 7741 7117 4 4 0.05% 0.06%
C 7741 7117 23 23 0.30% 0.32%
D 7741 7117 263 263 3.40% 3.70%

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 1632571 9323.78 718 699 175.0
A 3 14 608897 3474.97 718 699 175.0
A 8 249 81757 463.13 718 699 175.0
B 7 252 43306 273.51 728 703 155.8
B 12 111 18682 115.43 728 703 155.8
B 11 111 17728 109.3 728 703 155.8
C 13 3 127417 657.1 709 701 192.8
C 15 160 51722 264.57 709 701 192.8
C 6 223 40233 205.0 709 701 192.8
D 7 70 1391210 6946.1 706 672 200.2
D 11 129 476450 2376.64 706 672 200.2
D 2 249 150468 748.27 706 672 200.2

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