ASTROSAT CZTI

Data Quality Report

Orbit 20220103_T04_090T01_9000004840_level2

Creation date: 2022-01-06T12:36:45.578488
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_090T01_9000004840cztM0_level2_bc.evt modeM0/AS1T04_090T01_9000004840cztM0_level2_quad_clean.evt
Size (bytes)5,778,938,8801,242,573,120
Size5.4 GB 1.2 GB
Events in quadrant A39,181,3407,722,083
Events in quadrant B32,917,3127,993,813
Events in quadrant C30,274,8737,954,704
Events in quadrant D66,004,0317,257,418

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03950
B03950
C03950
D03950

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02835920
B02469290
C02227390
D03592160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019960
B020000
C020040
D019980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9782685398.728763%
B9783343084.403422%
C9784813821.412395%
D9780993049.512417%

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 139017 97892 520 520 0.37% 0.53%
B 139017 97881 322 322 0.23% 0.33%
C 139017 97926 151 151 0.11% 0.15%
D 139017 97864 1486 1486 1.07% 1.52%

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 19191979 17512.24 5033 4972 1095.6
A 13 6 234988 209.94 5033 4972 1095.6
A 7 16 183072 162.55 5033 4972 1095.6
B 5 172 8749360 8654.91 5151 5048 1010.3
B 5 255 1019553 1004.13 5151 5048 1010.3
B 15 222 642643 631.08 5151 5048 1010.3
C 15 214 4013065 3458.48 5080 5044 1158.9
C 0 10 3367356 2901.3 5080 5044 1158.9
C 3 233 1882219 1619.79 5080 5044 1158.9
D 1 52 15721647 13256.83 4943 4794 1185.6
D 8 195 13413810 11310.22 4943 4794 1185.6
D 12 235 8058636 6793.25 4943 4794 1185.6

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