ASTROSAT CZTI

Data Quality Report

Orbit 39876

Creation date: 2024-06-27T22:09:44.902351
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/AS1A12_032T02_9000005500_39876cztM0_level2.fits modeM0/AS1A12_032T02_9000005500_39876cztM0_level2_quad_clean.evt
Size (bytes)570,018,240144,846,720
Size543.6 MB 138.1 MB
Events in quadrant A4,872,017968,289
Events in quadrant B5,141,622982,532
Events in quadrant C4,367,832956,075
Events in quadrant D6,022,509855,820

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01820
B01820
C01820
D01820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0199551
B0215691
C0186461
D0241861

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8972660.735622%
B89721461.627285%
C8972170.189478%
D89723984.436023%

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 10285 8973 54 54 0.53% 0.60%
B 10285 8973 71 71 0.69% 0.79%
C 10285 8973 15 15 0.15% 0.17%
D 10285 8973 353 353 3.43% 3.93%

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 10 83 702707 3542.41 963 940 198.1
A 14 235 174294 875.06 963 940 198.1
A 13 248 113960 570.51 963 940 198.1
B 0 183 372554 2011.08 961 936 184.8
B 0 190 212957 1147.39 961 936 184.8
B 0 245 190283 1024.69 961 936 184.8
C 15 214 370173 1669.33 949 955 221.2
C 14 254 81474 364.05 949 955 221.2
C 9 187 69674 310.7 949 955 221.2
D 2 250 449494 1972.8 925 897 227.4
D 12 227 398066 1746.63 925 897 227.4
D 1 47 293430 1286.48 925 897 227.4

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