ASTROSAT CZTI

Data Quality Report

Orbit 20170827_C02_045T02_9000001492_level2

Creation date: 2020-06-09T09:41:24.252462
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/AS1C02_045T02_9000001492cztM0_level2_bc.evt modeM0/AS1C02_045T02_9000001492cztM0_level2_quad_clean.evt
Size (bytes)227,496,960104,921,280
Size217.0 MB 100.1 MB
Events in quadrant A1,338,159664,107
Events in quadrant B1,537,083655,262
Events in quadrant C1,330,888674,666
Events in quadrant D2,220,452719,128

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143430
B0144490
C0143300
D0171900

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0860
B0820
C0840
D0870

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6978871.246776%
B66951422.120986%
C7005360.513919%
D77291031.332643%

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 9315 8350 0 0 0.00% 0.00%
B 9317 8093 0 0 0.00% 0.00%
C 9317 8344 0 0 0.00% 0.00%
D 9317 8336 0 0 0.00% 0.00%

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 15 174 13707 177.69 335 327 75.3
A 13 251 9725 124.81 335 327 75.3
A 8 5 8740 111.73 335 327 75.3
B 4 239 132374 2031.36 324 316 65.0
B 11 51 65966 1009.85 324 316 65.0
B 3 208 44332 677.07 324 316 65.0
C 14 67 3628 42.69 338 333 77.2
C 14 234 3530 41.42 338 333 77.2
C 4 175 2233 24.62 338 333 77.2
D 8 195 429846 4883.04 370 356 88.0
D 1 20 103044 1167.5 370 356 88.0
D 2 33 66053 746.94 370 356 88.0

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