ASTROSAT CZTI

Data Quality Report

Orbit 20200917_A09_038T11_9000003878_level2

Creation date: 2021-01-08T07:12:43.649821
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A09_038T11_9000003878cztM0_level2_bc.evt modeM0/AS1A09_038T11_9000003878cztM0_level2_quad_clean.evt
Size (bytes)206,686,08077,641,920
Size197.1 MB 74.0 MB
Events in quadrant A2,625,365506,026
Events in quadrant B1,077,063536,080
Events in quadrant C788,093514,219
Events in quadrant D1,476,750500,184

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142770
B096000
C084670
D0106530

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A41892445.824779%
B4189621.480067%
C4189300.716161%
D4189862.052996%

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 4979 4188 23 23 0.46% 0.55%
B 4979 4188 1 1 0.02% 0.02%
C 4979 4189 0 0 0.00% 0.00%
D 4979 4188 11 11 0.22% 0.26%

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 13 1229845 26012.37 205 201 47.3
A 6 16 584873 12368.38 205 201 47.3
A 7 192 9037 186.92 205 201 47.3
B 0 190 160228 3602.32 213 207 44.4
B 3 64 45728 1024.75 213 207 44.4
B 10 246 40144 899.04 213 207 44.4
C 3 233 4136 78.48 203 202 50.1
C 15 208 2086 37.59 203 202 50.1
C 13 61 1173 19.37 203 202 50.1
D 1 52 424531 8714.85 203 196 48.7
D 2 250 105944 2171.81 203 196 48.7
D 11 176 85488 1751.69 203 196 48.7

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