ASTROSAT CZTI

Data Quality Report

Orbit 20171218_A04_075T03_9000001780_level2

Creation date: 2017-12-19T09:47:32.666277
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/AS1A04_075T03_9000001780cztM0_level2_bc.evt modeM0/AS1A04_075T03_9000001780cztM0_level2_quad_clean.evt
Size (bytes)299,548,800117,457,920
Size285.7 MB 112.0 MB
Events in quadrant A1,697,409779,589
Events in quadrant B2,558,821763,556
Events in quadrant C1,520,087765,636
Events in quadrant D2,781,951731,592

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162410
B0200550
C0154610
D0192050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74291481.992193%
B74295036.770763%
C7429831.117243%
D74293224.334365%

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 8564 7428 3 3 0.04% 0.04%
B 8564 7427 3 3 0.04% 0.04%
C 8564 7428 0 0 0.00% 0.00%
D 8564 7428 25 25 0.29% 0.34%

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 13 251 56583 625.7 398 390 89.8
A 1 162 52848 584.12 398 390 89.8
A 4 2 29724 326.63 398 390 89.8
B 4 239 369853 4872.41 390 382 75.8
B 0 85 294037 3872.58 390 382 75.8
B 15 204 138558 1822.2 390 382 75.8
C 13 250 2466 23.96 386 380 87.0
C 0 207 2463 23.93 386 380 87.0
C 13 61 2341 22.53 386 380 87.0
D 1 52 468287 5223.89 383 370 89.6
D 4 95 351560 3920.73 383 370 89.6
D 8 195 212033 2363.03 383 370 89.6

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