ASTROSAT CZTI

Data Quality Report

Orbit 20200122_A07_135T01_9000003452_level2

Creation date: 2020-01-24T10:26:24.481678
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/AS1A07_135T01_9000003452cztM0_level2_bc.evt modeM0/AS1A07_135T01_9000003452cztM0_level2_quad_clean.evt
Size (bytes)1,484,498,880444,375,360
Size1.4 GB 423.8 MB
Events in quadrant A8,320,1612,747,925
Events in quadrant B9,060,8742,782,681
Events in quadrant C13,743,4592,653,602
Events in quadrant D11,214,0692,636,834

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07840
B07840
C07840
D07840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0803570
B0830850
C01004890
D0896600

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0670
B0670
C0670
D0670

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A384122810.731542%
B384084691.221100%
C3841010812.814371%
D384155261.369257%

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 45149 38412 0 0 0.00% 0.00%
B 45149 38411 5 5 0.01% 0.01%
C 45149 38408 65 65 0.14% 0.17%
D 45149 38413 63 63 0.14% 0.16%

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 52957 110.19 2152 2113 461.4
A 0 226 13996 25.75 2152 2113 461.4
A 12 194 13461 24.59 2152 2113 461.4
B 0 189 287547 716.05 2154 2107 398.6
B 0 190 169826 420.74 2154 2107 398.6
B 0 245 106415 261.67 2154 2107 398.6
C 0 239 5142357 10690.14 2066 2061 480.8
C 7 247 286224 590.97 2066 2061 480.8
C 10 9 223662 460.86 2066 2061 480.8
D 1 52 1368810 2783.24 2129 2057 491.1
D 9 85 474525 962.13 2129 2057 491.1
D 12 233 246279 497.33 2129 2057 491.1

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