ASTROSAT CZTI

Data Quality Report

Orbit 20210621_A10_071T48_9000004478_level2

Creation date: 2021-06-23T12:14:55.225719
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_071T48_9000004478cztM0_level2_bc.evt modeM0/AS1A10_071T48_9000004478cztM0_level2_quad_clean.evt
Size (bytes)3,638,041,9201,011,216,960
Size3.4 GB 964.4 MB
Events in quadrant A17,123,2836,525,767
Events in quadrant B41,268,9996,420,717
Events in quadrant C20,299,6936,173,929
Events in quadrant D26,070,5316,046,103

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016200
B016200
C016200
D016200

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01350
B01350
C01350
D01350

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01663680
B02499710
C01807730
D01948980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7968710851.361577%
B7968728913.627944%
C7968725293.173667%
D7968715471.941346%

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 92982 79681 0 0 0.00% 0.00%
B 92982 79678 105 105 0.11% 0.13%
C 92982 79677 52 52 0.06% 0.07%
D 92982 79682 225 225 0.24% 0.28%

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 11 47 141838 144.86 4400 4325 949.3
A 13 254 139555 142.46 4400 4325 949.3
A 0 226 27720 24.64 4400 4325 949.3
B 6 159 21820005 26665.07 4383 4287 818.1
B 5 172 1044848 1271.86 4383 4287 818.1
B 0 190 370915 448.12 4383 4287 818.1
C 0 10 3292256 3359.91 4175 4159 978.6
C 3 233 352037 355.48 4175 4159 978.6
C 14 67 216097 216.57 4175 4159 978.6
D 8 195 2896291 2971.77 4266 4127 973.2
D 1 239 2109857 2163.69 4266 4127 973.2
D 13 174 1880816 1928.34 4266 4127 973.2

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