ASTROSAT CZTI

Data Quality Report

Orbit 31911

Creation date: 2024-06-27T20:34:06.472355
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/AS1A10_123T09_9000004654_31911cztM0_level2.evt modeM0/AS1A10_123T09_9000004654_31911cztM0_level2_quad_clean.evt
Size (bytes)957,263,040105,333,120
Size912.9 MB 100.5 MB
Events in quadrant A4,110,274708,652
Events in quadrant B9,779,480629,163
Events in quadrant C5,171,538659,007
Events in quadrant D9,368,818613,765

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0207283218
B0399234848
C0241503330
D0411157470

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020535
B019725
C020836
D020430

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134
B0145
C0134
D0155

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8360570.681818%
B8309175321.097605%
C83393203.837391%
D827693311.273562%

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 18215 8431 4 4 0.02% 0.05%
B 18215 8378 1177 1177 6.46% 14.05%
C 18215 8412 66 66 0.36% 0.78%
D 18215 8354 711 711 3.90% 8.51%

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 15 174 131212 631.98 1028 1005 206.0
A 13 254 17175 78.48 1028 1005 206.0
A 3 137 10307 45.15 1028 1005 206.0
B 4 80 2314343 12926.66 935 910 179.0
B 6 159 2159892 12063.64 935 910 179.0
B 5 172 631004 3520.75 935 910 179.0
C 0 10 728143 3205.7 969 974 226.8
C 3 233 432608 1902.85 969 974 226.8
C 14 238 165079 723.45 969 974 226.8
D 12 33 2469061 10883.41 945 921 226.8
D 8 195 2032263 8957.32 945 921 226.8
D 7 238 803827 3540.46 945 921 226.8

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