ASTROSAT CZTI

Data Quality Report

Orbit 20201110_T03_262T01_9000003988_level2

Creation date: 2025-12-17T12:14:28.956954
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/AS1T03_262T01_9000003988cztM0_level2.fits modeM0/AS1T03_262T01_9000003988cztM0_level2_quad_clean.evt
Size (bytes)1,502,959,6801,236,297,600
Size1.4 GB 1.2 GB
Events in quadrant A9,342,6947,147,719
Events in quadrant B8,901,1747,037,714
Events in quadrant C9,058,1986,791,417
Events in quadrant D7,834,2066,082,811

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03156410
B03306910
C03222820
D03820210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030940
B030920
C030940
D030940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02520
B02520
C02520
D02520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15148217491.154593%
B15148227201.795593%
C15148227431.810776%
D15148260073.965488%

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 176131 151454 0 0 0.00% 0.00%
B 176131 151450 0 0 0.00% 0.00%
C 176131 151455 0 0 0.00% 0.00%
D 176131 151043 0 0 0.00% 0.00%

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 29 7720 9.15 2434 2293 593.0
A 7 110 7443 8.68 2434 2293 593.0
A 9 19 6969 7.89 2434 2293 593.0
B 2 9 7010 10.45 2356 2250 455.3
B 5 128 5941 8.11 2356 2250 455.3
B 2 8 5821 7.84 2356 2250 455.3
C 12 241 6273 6.67 2398 2249 603.4
C 3 187 6011 6.23 2398 2249 603.4
C 9 209 6006 6.23 2398 2249 603.4
D 3 14 5624 6.06 2236 2039 591.3
D 15 46 5598 6.02 2236 2039 591.3
D 10 189 5591 6.01 2236 2039 591.3

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