ASTROSAT CZTI

Data Quality Report

Orbit 20201115_A09_038T35_9000004006_level2

Creation date: 2021-01-07T12:29:41.501000
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_038T35_9000004006cztM0_level2_bc.evt modeM0/AS1A09_038T35_9000004006cztM0_level2_quad_clean.evt
Size (bytes)397,065,600186,304,320
Size378.7 MB 177.7 MB
Events in quadrant A2,534,9841,270,060
Events in quadrant B3,573,1811,274,242
Events in quadrant C2,630,2361,226,970
Events in quadrant D2,620,9021,201,273

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02000
B02000
C02000
D02000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0214890
B0251510
C0222340
D0219350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A96611671.728600%
B96614604.761412%
C96611871.935617%
D96611711.770003%

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 11356 9661 24 24 0.21% 0.25%
B 11356 9660 97 97 0.85% 1.00%
C 11356 9662 1 1 0.01% 0.01%
D 11356 9661 59 59 0.52% 0.61%

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 13 170 473781 4119.05 510 501 114.9
A 6 16 78148 675.78 510 501 114.9
A 13 254 15908 134.09 510 501 114.9
B 3 64 1234961 12542.74 509 497 98.4
B 10 245 146640 1484.88 509 497 98.4
B 5 172 67464 680.42 509 497 98.4
C 3 233 743211 6266.57 489 487 118.5
C 8 128 2999 21.19 489 487 118.5
C 13 61 2839 19.84 489 487 118.5
D 1 52 230354 1937.79 498 481 118.6
D 2 250 172698 1451.76 498 481 118.6
D 7 69 80071 670.93 498 481 118.6

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