ASTROSAT CZTI

Data Quality Report

Orbit 20170731_A03_008T02_9000001422_level2

Creation date: 2017-09-24T13:09:36.687227
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/AS1A03_008T02_9000001422cztM0_level2.evt modeM0/AS1A03_008T02_9000001422cztM0_level2_quad_clean.evt
Size (bytes)933,667,200202,034,880
Size890.4 MB 192.7 MB
Events in quadrant A5,829,1261,324,641
Events in quadrant B6,089,4611,371,073
Events in quadrant C5,678,6081,352,856
Events in quadrant D9,860,2521,234,168

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0380
D0390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257580
B0264100
C0253980
D0376850

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02540
B02560
C02460
D02480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A121041641.354924%
B121411861.531999%
C121421231.013013%
D119425874.915425%

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 16474 12482 8 8 0.05% 0.06%
B 16474 12502 5 5 0.03% 0.04%
C 16474 12504 0 0 0.00% 0.00%
D 16474 12434 396 396 2.40% 3.18%

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 14 254 114361 383.04 1465 1436 294.8
A 15 174 50494 166.4 1465 1436 294.8
A 8 15 23322 74.24 1465 1436 294.8
B 4 81 91827 324.46 1492 1460 278.5
B 4 239 57293 200.47 1492 1460 278.5
B 0 219 53526 186.94 1492 1460 278.5
C 13 61 10859 28.67 1451 1459 327.9
C 14 67 6561 15.56 1451 1459 327.9
C 12 4 6159 14.33 1451 1459 327.9
D 12 233 1395358 4004.97 1386 1350 348.1
D 1 52 1005753 2885.64 1386 1350 348.1
D 2 33 666221 1910.17 1386 1350 348.1

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