ASTROSAT CZTI

Data Quality Report

Orbit 35378

Creation date: 2022-04-16T10:58:47.235229
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/AS1A11_099T01_9000005068_35378cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35378cztM0_level2_quad_clean.evt
Size (bytes)607,389,12051,258,240
Size579.3 MB 48.9 MB
Events in quadrant A2,794,939350,146
Events in quadrant B7,466,308199,900
Events in quadrant C3,497,064340,897
Events in quadrant D4,292,985303,844

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0350

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111063
B0257472
C0132552
D0164432

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5077110.216663%
B5077205540.476659%
C50772304.530234%
D50772094.116604%

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 7201 5078 2 2 0.03% 0.04%
B 7201 5078 1759 1759 24.43% 34.64%
C 7201 5078 178 178 2.47% 3.51%
D 7201 5078 177 177 2.46% 3.49%

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 10 83 116242 865.69 671 660 133.5
A 14 254 32822 240.89 671 660 133.5
A 9 143 22406 162.87 671 660 133.5
B 4 251 5026561 50796.86 522 511 98.9
B 5 172 173533 1748.68 522 511 98.9
B 5 236 100249 1008.02 522 511 98.9
C 0 10 555230 3852.46 627 630 144.0
C 10 49 225334 1560.87 627 630 144.0
C 15 214 210436 1457.39 627 630 144.0
D 8 195 735965 4864.96 626 611 151.2
D 10 253 354412 2340.68 626 611 151.2
D 12 217 171934 1133.44 626 611 151.2

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