ASTROSAT CZTI

Data Quality Report

Orbit 51718

Creation date: 2025-04-22T12:01:24.478777
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_51718cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51718cztM0_level2_quad_clean.evt
Size (bytes)582,451,200118,624,320
Size555.5 MB 113.1 MB
Events in quadrant A5,324,239773,254
Events in quadrant B4,457,845836,862
Events in quadrant C6,516,676713,911
Events in quadrant D4,620,695693,407

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213980
B0190250
C0249810
D0196330

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82641071.294773%
B82641371.657793%
C82645506.655373%
D82651421.718088%

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 8264 8264 44 44 0.53% 0.53%
B 8264 8264 76 76 0.92% 0.92%
C 8264 8264 428 428 5.18% 5.18%
D 8265 8265 100 100 1.21% 1.21%

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 499234 2273.86 901 878 219.2
A 3 14 354935 1615.46 901 878 219.2
A 9 191 248745 1130.95 901 878 219.2
B 0 213 297146 1547.6 894 863 191.4
B 1 223 174738 908.22 894 863 191.4
B 10 44 91277 472.27 894 863 191.4
C 10 171 679551 2952.45 851 846 229.9
C 13 3 627722 2726.99 851 846 229.9
C 15 178 465701 2022.18 851 846 229.9
D 7 110 204092 847.2 867 837 239.9
D 1 3 188510 782.25 867 837 239.9
D 7 159 140999 584.22 867 837 239.9

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