ASTROSAT CZTI

Data Quality Report

Orbit 56278

Creation date: 2026-02-23T13:53:20.094748
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_049T01_9000006552_56278cztM0_level2.fits modeM0/AS1A14_049T01_9000006552_56278cztM0_level2_quad_clean.evt
Size (bytes)811,465,92091,532,160
Size773.9 MB 87.3 MB
Events in quadrant A13,574,812399,357
Events in quadrant B3,980,551716,653
Events in quadrant C6,505,730575,062
Events in quadrant D5,421,599580,604

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0453050
B0170220
C0244640
D0212150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7171350548.877423%
B71712934.085902%
C7171106414.837540%
D71715027.000418%

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 7171 7171 3398 3398 47.39% 47.39%
B 7171 7171 115 115 1.60% 1.60%
C 7171 7171 928 928 12.94% 12.94%
D 7171 7171 521 521 7.27% 7.27%

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 8 176 4243563 26641.61 639 623 159.3
A 12 115 2854835 17921.73 639 623 159.3
A 15 32 2320206 14564.77 639 623 159.3
B 5 185 375571 2274.89 770 743 164.8
B 8 128 153044 924.34 770 743 164.8
B 1 207 100610 606.11 770 743 164.8
C 12 254 2513164 12961.32 703 695 193.8
C 13 3 598329 3083.07 703 695 193.8
C 12 252 216334 1112.44 703 695 193.8
D 5 32 1169940 5535.44 738 705 211.2
D 8 129 404973 1913.9 738 705 211.2
D 3 12 236514 1116.38 738 705 211.2

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