ASTROSAT CZTI

Data Quality Report

Orbit 51684

Creation date: 2025-04-22T12:01:09.971970
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/AS1A13_031T01_9000006462_51684cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51684cztM0_level2_quad_clean.evt
Size (bytes)469,088,64092,275,200
Size447.4 MB 88.0 MB
Events in quadrant A3,716,635610,311
Events in quadrant B3,981,168657,279
Events in quadrant C5,731,085535,764
Events in quadrant D3,442,394548,510

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151871
B0161471
C0215091
D0147261

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63381722.713790%
B63392934.622180%
C633986013.566809%
D63391782.808014%

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 7443 6339 71 71 0.95% 1.12%
B 7444 6340 141 141 1.89% 2.22%
C 7444 6340 770 770 10.34% 12.15%
D 7444 6340 92 92 1.24% 1.45%

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 3 135130 797.92 690 675 168.5
A 3 14 128234 757.0 690 675 168.5
A 7 206 120592 711.65 690 675 168.5
B 10 44 569481 3911.32 679 656 145.4
B 5 173 126191 863.2 679 656 145.4
B 10 41 108688 742.84 679 656 145.4
C 15 189 2010379 11622.63 632 628 172.9
C 0 192 377495 2179.46 632 628 172.9
C 13 3 225240 1298.95 632 628 172.9
D 6 42 220531 1188.54 663 636 185.0
D 15 94 130384 701.29 663 636 185.0
D 2 249 99488 534.3 663 636 185.0

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