ASTROSAT CZTI

Data Quality Report

Orbit 20210718_C06_006T05_9000004550_level2

Creation date: 2021-07-19T15:33:16.782733
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/AS1C06_006T05_9000004550cztM0_level2_bc.evt modeM0/AS1C06_006T05_9000004550cztM0_level2_quad_clean.evt
Size (bytes)408,758,400123,845,760
Size389.8 MB 118.1 MB
Events in quadrant A1,940,660811,046
Events in quadrant B4,909,609782,520
Events in quadrant C1,992,099766,452
Events in quadrant D2,913,848762,382

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01880
C01860
D01860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0193450
B0296740
C0196290
D0221080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A90442472.731092%
B90326427.108060%
C90503984.397790%
D90472242.475959%

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 9888 9052 1 1 0.01% 0.01%
B 9888 9040 5 5 0.05% 0.06%
C 9888 9065 1 1 0.01% 0.01%
D 9888 9065 5 5 0.05% 0.06%

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 63209 583.82 484 474 107.5
A 13 254 16471 148.87 484 474 107.5
A 13 170 6219 53.46 484 474 107.5
B 6 159 2450011 26304.33 475 463 93.1
B 5 172 170248 1823.23 475 463 93.1
B 0 190 164821 1764.95 475 463 93.1
C 3 233 106509 955.54 460 456 111.0
C 0 10 71370 638.93 460 456 111.0
C 2 114 17441 153.03 460 456 111.0
D 8 195 828587 7420.6 477 460 111.6
D 10 203 69724 620.65 477 460 111.6
D 2 250 49158 436.37 477 460 111.6

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