ASTROSAT CZTI

Data Quality Report

Orbit 20211231_A11_065T07_9000004828_level2

Creation date: 2022-01-03T12:03:21.469458
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/AS1A11_065T07_9000004828cztM0_level2_bc.evt modeM0/AS1A11_065T07_9000004828cztM0_level2_quad_clean.evt
Size (bytes)835,536,960236,793,600
Size796.8 MB 225.8 MB
Events in quadrant A3,942,6191,528,710
Events in quadrant B4,511,1101,576,697
Events in quadrant C5,041,5921,579,744
Events in quadrant D10,820,7031,488,146

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0342060
B0352610
C0358570
D0552830

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02960
C02960
D02960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A144715954.111672%
B144714423.054385%
C144712671.845069%
D144719966.882731%

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 22601 14471 26 26 0.12% 0.18%
B 22601 14472 16 16 0.07% 0.11%
C 22601 14471 24 24 0.11% 0.17%
D 22601 14471 139 139 0.62% 0.96%

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 15 169 469307 2700.18 796 786 173.5
A 0 254 303891 1746.86 796 786 173.5
A 13 6 39600 223.69 796 786 173.5
B 5 172 1078095 6684.94 814 799 161.2
B 0 190 70606 433.17 814 799 161.2
B 5 200 41465 252.34 814 799 161.2
C 15 214 590443 3225.62 802 800 182.8
C 14 254 413284 2256.48 802 800 182.8
C 9 187 252348 1376.08 802 800 182.8
D 8 195 3162348 16702.38 798 778 189.3
D 12 235 2660892 14053.22 798 778 189.3
D 2 250 649150 3425.31 798 778 189.3

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