ASTROSAT CZTI

Data Quality Report

Orbit 31891

Creation date: 2024-06-27T20:33:54.147682
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/AS1T04_042T01_9000004650_31891cztM0_level2.evt modeM0/AS1T04_042T01_9000004650_31891cztM0_level2_quad_clean.evt
Size (bytes)553,829,76088,392,960
Size528.2 MB 84.3 MB
Events in quadrant A2,911,549599,757
Events in quadrant B4,868,752582,059
Events in quadrant C4,969,057516,625
Events in quadrant D3,617,592559,587

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124311
B0187642
C0187771
D0147181

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5992440.734312%
B59921502.503338%
C599272112.032710%
D5992580.967957%

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 6987 5993 0 0 0.00% 0.00%
B 6987 5993 34 34 0.49% 0.57%
C 6987 5993 540 540 7.73% 9.01%
D 6987 5993 39 39 0.56% 0.65%

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 13 254 8585 52.08 753 740 150.6
A 3 137 7435 44.45 753 740 150.6
A 0 226 6570 38.7 753 740 150.6
B 6 159 1729170 12444.05 737 721 138.9
B 5 172 144672 1036.38 737 721 138.9
B 0 229 26969 188.97 737 721 138.9
C 0 239 1376116 8846.4 668 673 155.5
C 0 10 665823 4278.03 668 673 155.5
C 3 233 148308 949.54 668 673 155.5
D 8 195 479209 2766.21 720 700 173.0
D 12 233 209718 1208.31 720 700 173.0
D 12 218 90471 518.96 720 700 173.0

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