ASTROSAT CZTI

Data Quality Report

Orbit 20200917_T03_230T01_9000003874_level2

Creation date: 2021-01-08T07:30:03.555330
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/AS1T03_230T01_9000003874cztM0_level2_bc.evt modeM0/AS1T03_230T01_9000003874cztM0_level2_quad_clean.evt
Size (bytes)530,602,560219,767,040
Size506.0 MB 209.6 MB
Events in quadrant A4,336,5631,461,388
Events in quadrant B2,947,3511,503,541
Events in quadrant C2,285,2051,470,008
Events in quadrant D5,696,7581,411,691

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02400
B02400
C02400
D02400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0304750
B0260270
C0240600
D0351760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A116994063.470382%
B116993462.957518%
C116992662.273699%
D116997186.137277%

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 12309 11699 19 19 0.15% 0.16%
B 12309 11698 9 9 0.07% 0.08%
C 12309 11698 0 0 0.00% 0.00%
D 12309 11699 229 229 1.86% 1.96%

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 1620369 12250.61 590 578 132.2
A 6 16 426974 3224.87 590 578 132.2
A 13 254 17726 129.69 590 578 132.2
B 3 64 278992 2377.53 600 585 117.1
B 10 246 132319 1124.98 600 585 117.1
B 15 33 90560 768.36 600 585 117.1
C 15 208 16268 111.8 583 580 140.3
C 2 16 11053 74.64 583 580 140.3
C 8 128 7027 45.94 583 580 140.3
D 7 80 1514216 11175.02 578 562 135.4
D 11 176 736438 5432.83 578 562 135.4
D 1 52 722592 5330.61 578 562 135.4

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