ASTROSAT CZTI

Data Quality Report

Orbit 20210718_T04_027T01_9000004552_level2

Creation date: 2021-07-19T16:10:25.296648
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_027T01_9000004552cztM0_level2_bc.evt modeM0/AS1T04_027T01_9000004552cztM0_level2_quad_clean.evt
Size (bytes)1,969,496,640574,876,800
Size1.8 GB 548.2 MB
Events in quadrant A9,671,9723,679,694
Events in quadrant B22,729,0893,630,067
Events in quadrant C10,290,5203,531,867
Events in quadrant D13,911,4473,501,314

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0650
B0650
C0650
D0650

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09080
B09080
C09080
D09080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0926330
B01380030
C0969960
D01055080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A447133190.713439%
B4473710102.257639%
C4470110542.357889%
D447325001.117768%

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 51427 44736 0 0 0.00% 0.00%
B 51427 44754 12 12 0.02% 0.03%
C 51427 44722 7 7 0.01% 0.02%
D 51427 44754 32 32 0.06% 0.07%

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 5 16 220783 418.3 2441 2403 522.1
A 13 254 88357 164.64 2441 2403 522.1
A 12 194 16718 27.42 2441 2403 522.1
B 6 159 12166945 26273.33 2445 2391 463.0
B 5 172 285643 611.78 2445 2391 463.0
B 4 80 281742 603.35 2445 2391 463.0
C 3 233 532411 966.28 2337 2338 548.6
C 0 10 497695 903.0 2337 2338 548.6
C 2 114 84444 149.67 2337 2338 548.6
D 8 195 2684597 4819.13 2386 2317 556.6
D 10 203 695111 1244.71 2386 2317 556.6
D 2 250 462680 827.11 2386 2317 556.6

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