ASTROSAT CZTI

Data Quality Report

Orbit 36421

Creation date: 2022-06-23T22:30:55.189684
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/AS1T04_084T01_9000005198_36421cztM0_level2.evt modeM0/AS1T04_084T01_9000005198_36421cztM0_level2_quad_clean.evt
Size (bytes)445,343,04053,570,880
Size424.7 MB 51.1 MB
Events in quadrant A2,683,442327,101
Events in quadrant B4,781,556321,539
Events in quadrant C2,860,588317,614
Events in quadrant D2,823,435305,921

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0108723
B0176072
C0111612
D0114822

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A497570.140704%
B497566013.266332%
C4975941.889447%
D4975390.783920%

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 7128 4976 1 1 0.01% 0.02%
B 7128 4976 394 394 5.53% 7.92%
C 7128 4976 56 56 0.79% 1.13%
D 7128 4976 21 21 0.29% 0.42%

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 10 83 182188 1419.88 639 628 127.9
A 15 223 20088 152.18 639 628 127.9
A 13 254 8630 62.58 639 628 127.9
B 5 172 1596252 14141.53 604 590 112.8
B 5 255 300217 2655.44 604 590 112.8
B 5 236 249764 2208.3 604 590 112.8
C 0 10 266578 1898.02 608 614 140.1
C 15 214 213028 1515.87 608 614 140.1
C 0 207 6012 38.52 608 614 140.1
D 2 253 85963 579.68 613 596 147.3
D 12 235 83805 565.03 613 596 147.3
D 12 6 70066 471.73 613 596 147.3

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