ASTROSAT CZTI

Data Quality Report

Orbit 20200511_A08_003T18_9000003658_level2

Creation date: 2020-05-23T23:05:00.792466
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/AS1A08_003T18_9000003658cztM0_level2_bc.evt modeM0/AS1A08_003T18_9000003658cztM0_level2_quad_clean.evt
Size (bytes)1,635,062,400519,497,280
Size1.5 GB 495.4 MB
Events in quadrant A9,112,5323,313,105
Events in quadrant B9,561,4453,390,041
Events in quadrant C11,741,4613,138,381
Events in quadrant D16,266,3363,036,496

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04330
B04330
C04330
D04330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0886520
B0901580
C0985600
D01142260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A424652860.673496%
B424653810.897209%
C4246410642.505652%
D4246510312.427882%

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 52015 41607 1 1 0.00% 0.00%
B 52015 41607 6 6 0.01% 0.01%
C 52015 41606 147 147 0.28% 0.35%
D 52015 41604 120 120 0.23% 0.29%

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 13 254 53778 102.2 2345 2304 503.7
A 9 130 47289 89.31 2345 2304 503.7
A 6 16 26765 48.57 2345 2304 503.7
B 3 64 155630 345.28 2387 2334 444.0
B 10 246 102973 226.67 2387 2334 444.0
B 0 190 57352 123.92 2387 2334 444.0
C 7 247 2401392 4607.28 2238 2233 520.7
C 2 16 546007 1044.25 2238 2233 520.7
C 0 10 175716 333.15 2238 2233 520.7
D 7 238 3839100 7368.99 2255 2178 520.7
D 10 70 1370643 2628.2 2255 2178 520.7
D 1 52 1114537 2136.34 2255 2178 520.7

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