ASTROSAT CZTI

Data Quality Report

Orbit 20180124_A04_085T01_9000001868_level2

Creation date: 2018-07-24T15:00:27.410787
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/AS1A04_085T01_9000001868cztM0_level2_bc.evt modeM0/AS1A04_085T01_9000001868cztM0_level2_quad_clean.evt
Size (bytes)442,869,120210,185,280
Size422.4 MB 200.4 MB
Events in quadrant A2,855,4721,347,561
Events in quadrant B3,081,2631,388,374
Events in quadrant C3,011,4681,351,429
Events in quadrant D3,491,0951,300,892

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0294000
B0301890
C0298460
D0311420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02900
B02900
C02900
D02900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A141631561.101462%
B141632231.574525%
C141631551.094401%
D141632391.687496%

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 17154 14161 0 0 0.00% 0.00%
B 17154 14161 9 9 0.05% 0.06%
C 17154 14161 6 6 0.03% 0.04%
D 17154 14161 23 23 0.13% 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 12 189 28468 174.13 724 710 159.4
A 12 96 13286 78.89 724 710 159.4
A 3 1 9406 54.55 724 710 159.4
B 3 64 134828 944.47 740 721 142.0
B 3 209 46646 323.43 740 721 142.0
B 0 214 26487 181.46 740 721 142.0
C 15 208 177163 1111.57 714 704 158.7
C 14 234 23164 141.48 714 704 158.7
C 14 67 11327 66.92 714 704 158.7
D 1 52 427670 2529.41 717 690 168.8
D 13 249 107212 631.03 717 690 168.8
D 2 234 54812 320.61 717 690 168.8

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