ASTROSAT CZTI

Data Quality Report

Orbit 35976

Creation date: 2022-07-18T23:26:14.247652
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/AS1A11_050T19_9000005156_35976cztM0_level2.evt modeM0/AS1A11_050T19_9000005156_35976cztM0_level2_quad_clean.evt
Size (bytes)895,642,56083,531,520
Size854.2 MB 79.7 MB
Events in quadrant A2,573,296680,991
Events in quadrant B14,501,444207,536
Events in quadrant C4,024,796641,672
Events in quadrant D5,653,153610,151

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112492
B0468531
C0154861
D0205431

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5511110.199601%
B5511551099.981854%
C55113426.205770%
D551164911.776447%

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 6854 5512 1 1 0.01% 0.02%
B 6853 5510 5357 5357 78.17% 97.22%
C 6854 5512 312 312 4.55% 5.66%
D 6854 5512 603 603 8.80% 10.94%

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 134538 1079.59 617 605 124.1
A 15 169 30745 242.95 617 605 124.1
A 7 3 15011 116.12 617 605 124.1
B 5 31 7098199 160387.55 224 219 44.3
B 5 15 5115239 115580.14 224 219 44.3
B 5 14 901625 20368.37 224 219 44.3
C 9 187 1423957 10694.27 577 582 133.1
C 15 214 218851 1639.92 577 582 133.1
C 0 10 80131 597.68 577 582 133.1
D 13 249 843779 6037.78 574 557 139.7
D 12 17 752851 5386.7 574 557 139.7
D 1 52 746441 5340.81 574 557 139.7

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