ASTROSAT CZTI

Data Quality Report

Orbit 20201223_A10_116T01_9000004082_level2

Creation date: 2021-01-06T18:00:09.581744
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/AS1A10_116T01_9000004082cztM0_level2_bc.evt modeM0/AS1A10_116T01_9000004082cztM0_level2_quad_clean.evt
Size (bytes)6,801,405,1202,141,735,040
Size6.3 GB 2.0 GB
Events in quadrant A36,914,31113,782,278
Events in quadrant B41,606,93314,021,865
Events in quadrant C37,662,77513,293,246
Events in quadrant D78,576,90612,473,495

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A033580
B033580
C033580
D033580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02670
B02670
C02670
D02670

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03510490
B03678670
C03587270
D04933560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16495725121.522821%
B16495741802.533994%
C16495734192.072661%
D16495799026.002776%

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 191572 164956 73 73 0.04% 0.04%
B 191572 164948 202 202 0.11% 0.12%
C 191572 164955 8 8 0.00% 0.00%
D 191572 164954 2198 2198 1.15% 1.33%

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 15 174 2070411 1072.99 8923 8786 1921.4
A 12 96 266305 134.03 8923 8786 1921.4
A 13 254 260448 130.98 8923 8786 1921.4
B 10 245 5333796 3151.1 9038 8825 1689.9
B 10 246 658095 384.21 9038 8825 1689.9
B 0 230 466002 270.54 9038 8825 1689.9
C 3 233 4480875 2224.98 8598 8576 2010.0
C 13 61 48623 19.92 8598 8576 2010.0
C 7 247 48227 19.73 8598 8576 2010.0
D 1 52 27548854 14251.92 8507 8222 1932.4
D 8 195 13168907 6810.48 8507 8222 1932.4
D 7 238 2362293 1218.2 8507 8222 1932.4

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