ASTROSAT CZTI

Data Quality Report

Orbit 20211222_T04_088T01_9000004814_level2

Creation date: 2021-12-23T17:43:19.385409
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_088T01_9000004814cztM0_level2_bc.evt modeM0/AS1T04_088T01_9000004814cztM0_level2_quad_clean.evt
Size (bytes)1,534,446,720407,367,360
Size1.4 GB 388.5 MB
Events in quadrant A7,503,7542,640,692
Events in quadrant B10,993,7932,622,863
Events in quadrant C8,909,6192,695,873
Events in quadrant D17,216,7342,512,891

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05520
B05520
C05520
D05520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0625300
B0779850
C0638980
D0940690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01310
B01310
C01310
D01310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A271486542.409017%
B2714821207.809047%
C271484051.491823%
D2714811724.317077%

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 38895 27144 36 36 0.09% 0.13%
B 38895 27145 34 34 0.09% 0.13%
C 38895 27147 48 48 0.12% 0.18%
D 38895 27149 197 197 0.51% 0.73%

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 15 237 1311670 3947.54 1531 1515 331.9
A 15 169 99620 295.59 1531 1515 331.9
A 13 6 79476 234.9 1531 1515 331.9
B 5 172 3768737 12951.23 1509 1484 290.9
B 8 128 232474 794.11 1509 1484 290.9
B 4 170 184745 630.02 1509 1484 290.9
C 15 214 1189712 3456.51 1525 1522 343.8
C 0 10 536466 1556.18 1525 1522 343.8
C 14 254 373423 1081.88 1525 1522 343.8
D 1 52 4701285 12139.73 1497 1470 387.1
D 8 195 3121385 8058.81 1497 1470 387.1
D 13 249 697212 1797.12 1497 1470 387.1

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