ASTROSAT CZTI

Data Quality Report

Orbit 20200812_A09_088T01_9000003808_level2

Creation date: 2021-01-05T16:40:59.773454
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_088T01_9000003808cztM0_level2_bc.evt modeM0/AS1A09_088T01_9000003808cztM0_level2_quad_clean.evt
Size (bytes)9,319,492,8002,335,438,080
Size8.7 GB 2.2 GB
Events in quadrant A35,857,26115,784,346
Events in quadrant B33,731,79916,231,959
Events in quadrant C87,207,69614,369,322
Events in quadrant D114,992,71113,804,550

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02630
B02630
C02630
D02630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A031380
B031380
C031380
D031380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03299760
B03223110
C05549220
D06448890

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15379823261.512373%
B15379819451.264646%
C1537982789618.138077%
D1537983448422.421618%

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 180258 153798 177 177 0.10% 0.12%
B 180258 153793 17 17 0.01% 0.01%
C 180258 153788 714 714 0.40% 0.46%
D 180258 153757 6064 6064 3.36% 3.94%

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 0 13 3224951 1775.34 8421 8297 1811.9
A 13 254 237992 126.77 8421 8297 1811.9
A 6 16 107450 54.72 8421 8297 1811.9
B 0 230 611701 379.16 8561 8390 1591.2
B 5 172 204248 123.09 8561 8390 1591.2
B 0 245 117185 68.37 8561 8390 1591.2
C 3 233 54456869 30226.94 7601 7597 1801.3
C 2 16 2128655 1177.48 7601 7597 1801.3
C 4 254 1263952 697.45 7601 7597 1801.3
D 7 80 56877899 32784.9 7461 7267 1734.7
D 1 52 25197261 14521.58 7461 7267 1734.7
D 11 176 2399170 1378.89 7461 7267 1734.7

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