ASTROSAT CZTI

Data Quality Report

Orbit 20771

Creation date: 2024-06-27T18:19:24.865049
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/AS1A05_013T01_9000003070_20771cztM0_level2.evt modeM0/AS1A05_013T01_9000003070_20771cztM0_level2_quad_clean.evt
Size (bytes)922,046,400215,184,960
Size879.3 MB 205.2 MB
Events in quadrant A5,761,1251,502,692
Events in quadrant B6,439,4361,470,177
Events in quadrant C5,651,9191,427,263
Events in quadrant D9,343,2481,371,008

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02200
B02200
C02200
D02200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0238272
B0260122
C0235252
D0359162

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270
B0270
C0270
D0270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A107861721.594660%
B107862942.725756%
C107872412.234171%
D107877587.026977%

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 13451 10786 4 4 0.03% 0.04%
B 13451 10786 73 73 0.54% 0.68%
C 13452 10787 0 0 0.00% 0.00%
D 13452 10787 569 569 4.23% 5.27%

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 5 16 46276 153.56 1483 1460 291.9
A 13 61 21303 67.99 1483 1460 291.9
A 0 226 13243 40.37 1483 1460 291.9
B 7 220 483421 1837.24 1433 1404 262.4
B 0 245 86778 325.41 1433 1404 262.4
B 0 230 54433 202.12 1433 1404 262.4
C 14 238 223534 707.15 1389 1403 314.1
C 13 61 9840 26.86 1389 1403 314.1
C 7 247 7964 20.89 1389 1403 314.1
D 1 20 2962930 8860.22 1412 1375 334.3
D 1 52 877690 2621.71 1412 1375 334.3
D 12 227 62842 183.89 1412 1375 334.3

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