ASTROSAT CZTI

Data Quality Report

Orbit 20540

Creation date: 2024-06-27T18:16:34.869840
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/AS1A05_022T08_9000003036_20540cztM0_level2.evt modeM0/AS1A05_022T08_9000003036_20540cztM0_level2_quad_clean.evt
Size (bytes)451,768,32092,177,280
Size430.8 MB 87.9 MB
Events in quadrant A3,118,537610,026
Events in quadrant B3,276,329619,406
Events in quadrant C3,253,892574,977
Events in quadrant D3,613,033555,454

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130242
B0134572
C0134482
D0147342

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6183170.274947%
B6183390.630762%
C6183621.002749%
D61831141.843765%

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 7574 6185 0 0 0.00% 0.00%
B 7574 6185 3 3 0.04% 0.05%
C 7574 6185 6 6 0.08% 0.10%
D 7574 6185 106 106 1.40% 1.71%

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 0 226 7215 39.62 809 796 162.0
A 3 137 6209 33.41 809 796 162.0
A 12 194 5552 29.36 809 796 162.0
B 0 189 40805 260.95 809 791 153.3
B 7 220 18363 114.59 809 791 153.3
B 12 111 17440 108.58 809 791 153.3
C 14 238 121783 679.76 764 772 178.0
C 8 208 83494 464.68 764 772 178.0
C 3 233 46166 254.99 764 772 178.0
D 13 153 335903 1780.73 764 742 188.2
D 7 238 148971 787.55 764 742 188.2
D 7 38 81469 428.91 764 742 188.2

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