ASTROSAT CZTI

Data Quality Report

Orbit 20200818_A09_056T01_9000003824_level2

Creation date: 2021-01-09T04:38:05.081937
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_056T01_9000003824cztM0_level2_bc.evt modeM0/AS1A09_056T01_9000003824cztM0_level2_quad_clean.evt
Size (bytes)1,564,476,480600,719,040
Size1.5 GB 572.9 MB
Events in quadrant A9,216,7263,987,071
Events in quadrant B9,487,4424,035,552
Events in quadrant C10,477,9143,863,566
Events in quadrant D15,589,3483,685,096

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07720
B07860
C07840
D07880

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C01080
D0980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0828990
B0837930
C0888530
D01050610

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A383703921.021631%
B381264481.175051%
C3837410202.658050%
D3795123736.252800%

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 52289 38281 23 23 0.04% 0.06%
B 52289 38074 0 0 0.00% 0.00%
C 52289 38289 56 56 0.11% 0.15%
D 52289 37966 634 634 1.21% 1.67%

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 478342 998.96 2243 2211 476.6
A 13 254 54558 109.83 2243 2211 476.6
A 12 189 38164 75.43 2243 2211 476.6
B 0 189 505337 1197.44 2255 2210 420.2
B 0 190 134272 314.31 2255 2210 420.2
B 10 245 93889 218.19 2255 2210 420.2
C 4 254 1387625 2702.09 2175 2179 512.7
C 3 233 528388 1026.29 2175 2179 512.7
C 2 16 148001 284.4 2175 2179 512.7
D 7 80 3168643 6417.12 2127 2080 493.5
D 1 52 2183752 4421.21 2127 2080 493.5
D 11 176 952687 1926.43 2127 2080 493.5

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