ASTROSAT CZTI

Data Quality Report

Orbit 20170526_A03_025T08_9000001248_level2

Creation date: 2021-08-26T23:40:26.336651
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A03_025T08_9000001248cztM0_level2_bc.evt modeM0/AS1A03_025T08_9000001248cztM0_level2_quad_clean.evt
Size (bytes)1,664,928,000602,841,600
Size1.6 GB 574.9 MB
Events in quadrant A12,986,2073,843,816
Events in quadrant B10,947,4963,850,351
Events in quadrant C12,021,3083,640,813
Events in quadrant D11,258,5033,696,884

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0990
B0990
C0990
D0990

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01087520
B01037850
C01107640
D01019710

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09600
B09600
C09600
D09600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4701710152.158794%
B4702012522.662697%
C4701524685.249388%
D470206761.437686%

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 67311 47026 16 16 0.02% 0.03%
B 67311 47019 26 26 0.04% 0.06%
C 67311 46997 70 70 0.10% 0.15%
D 67311 47027 74 74 0.11% 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 8 5 3221583 6061.03 2456 2408 531.1
A 15 174 218143 406.18 2456 2408 531.1
A 5 16 52012 93.39 2456 2408 531.1
B 10 16 693793 1480.57 2470 2398 467.0
B 12 32 284876 604.91 2470 2398 467.0
B 0 219 149204 314.37 2470 2398 467.0
C 4 254 2774897 5496.04 2327 2291 504.5
C 14 234 90547 174.95 2327 2291 504.5
C 9 68 33539 61.94 2327 2291 504.5
D 1 52 1019936 1769.0 2393 2317 575.3
D 7 71 339616 586.35 2393 2317 575.3
D 2 14 191753 329.31 2393 2317 575.3

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