ASTROSAT CZTI

Data Quality Report

Orbit 20201001_T03_231T01_9000003910_level2

Creation date: 2021-01-07T22:36:10.044624
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/AS1T03_231T01_9000003910cztM0_level2_bc.evt modeM0/AS1T03_231T01_9000003910cztM0_level2_quad_clean.evt
Size (bytes)5,026,616,6401,472,160,960
Size4.7 GB 1.4 GB
Events in quadrant A31,355,8569,456,871
Events in quadrant B36,483,3409,516,964
Events in quadrant C23,155,4359,208,810
Events in quadrant D53,483,0778,593,505

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A023240
B023240
C023240
D023240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02680680
B02799620
C02373670
D03398950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11401134833.054968%
B11401132072.812886%
C11401119351.697205%
D11401175616.631816%

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 129181 114015 10 10 0.01% 0.01%
B 129181 114014 268 268 0.21% 0.24%
C 129181 114015 4 4 0.00% 0.00%
D 129181 114014 2016 2016 1.56% 1.77%

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 14 235 6834388 5247.94 6050 5941 1301.2
A 6 16 577633 439.37 6050 5941 1301.2
A 12 189 489762 371.84 6050 5941 1301.2
B 0 189 7923449 6889.86 6123 5966 1149.2
B 3 112 2477495 2150.74 6123 5966 1149.2
B 10 245 1554385 1347.45 6123 5966 1149.2
C 15 208 306852 218.95 5879 5857 1374.7
C 2 16 131848 91.65 5879 5857 1374.7
C 3 233 82519 55.76 5879 5857 1374.7
D 1 52 20783415 15330.64 5811 5636 1355.3
D 7 38 3292246 2424.99 5811 5636 1355.3
D 13 172 2537241 1867.92 5811 5636 1355.3

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