ASTROSAT CZTI

Data Quality Report

Orbit 20180721_T02_071T01_9000002246_level2

Creation date: 2018-07-30T17:44:32.681688
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/AS1T02_071T01_9000002246cztM0_level2_bc.evt modeM0/AS1T02_071T01_9000002246cztM0_level2_quad_clean.evt
Size (bytes)2,662,352,640918,377,280
Size2.5 GB 875.8 MB
Events in quadrant A25,699,7836,142,284
Events in quadrant B20,233,7826,105,319
Events in quadrant C19,888,0786,230,602
Events in quadrant D11,533,2166,032,005

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0930
B0930
C0930
D0930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09780
B09780
C09780
D09780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01483690
B01393340
C01365540
D01036380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4820924275.034330%
B4820944419.211973%
C482099501.970586%
D482094700.974922%

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 62839 48211 312 312 0.50% 0.65%
B 62839 48198 612 612 0.97% 1.27%
C 62839 48209 35 35 0.06% 0.07%
D 62839 48210 39 39 0.06% 0.08%

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 0 253 14699866 27274.63 2493 2456 538.9
A 12 189 1233442 2284.39 2493 2456 538.9
A 13 248 87297 157.44 2493 2456 538.9
B 3 112 7708038 16772.78 2462 2407 459.4
B 3 64 1133148 2461.27 2462 2407 459.4
B 0 229 490880 1063.25 2462 2407 459.4
C 3 233 9244121 16988.7 2471 2453 544.0
C 4 254 820928 1504.58 2471 2453 544.0
C 7 247 86023 153.62 2471 2453 544.0
D 2 33 690393 1196.89 2499 2425 574.8
D 7 38 302183 521.5 2499 2425 574.8
D 2 234 173444 297.53 2499 2425 574.8

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