ASTROSAT CZTI

Data Quality Report

Orbit 20918

Creation date: 2024-06-27T18:21:11.996607
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/AS1C04_001T01_9000003082_20918cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20918cztM0_level2_quad_clean.evt
Size (bytes)459,440,640124,845,120
Size438.2 MB 119.1 MB
Events in quadrant A4,259,184848,315
Events in quadrant B3,158,175858,705
Events in quadrant C2,978,921817,030
Events in quadrant D3,088,029815,805

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0166851
B0133091
C0129111
D0134871

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63192744.336129%
B63201161.835443%
C63201061.677215%
D63201241.962025%

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 7279 6320 109 109 1.50% 1.72%
B 7280 6321 13 13 0.18% 0.21%
C 7280 6321 0 0 0.00% 0.00%
D 7280 6321 62 62 0.85% 0.98%

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 6 16 1260038 8283.46 765 748 152.0
A 5 16 55671 361.28 765 748 152.0
A 0 226 6762 39.56 765 748 152.0
B 7 220 87598 608.87 758 738 142.7
B 0 228 44209 304.72 758 738 142.7
B 0 219 17978 120.85 758 738 142.7
C 14 238 116593 693.49 726 729 167.1
C 9 54 14768 84.03 726 729 167.1
C 7 247 9414 51.98 726 729 167.1
D 1 52 215232 1203.64 744 723 178.2
D 2 234 28036 153.26 744 723 178.2
D 7 38 20925 113.36 744 723 178.2

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