ASTROSAT CZTI

Data Quality Report

Orbit 20200505_A08_003T09_9000003644_level2

Creation date: 2020-05-10T10:11:56.925965
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/AS1A08_003T09_9000003644cztM0_level2_bc.evt modeM0/AS1A08_003T09_9000003644cztM0_level2_quad_clean.evt
Size (bytes)1,037,208,960362,062,080
Size989.2 MB 345.3 MB
Events in quadrant A6,988,6992,273,451
Events in quadrant B6,034,0812,312,454
Events in quadrant C6,663,5052,201,455
Events in quadrant D9,718,9072,160,031

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0646610
B0610800
C0632570
D0721380

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05980
B05980
C05980
D05980

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A293768212.794798%
B293764271.453568%
C293767122.423747%
D293765241.783769%

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 33316 29379 85 85 0.26% 0.29%
B 33316 29377 0 0 0.00% 0.00%
C 33316 29378 42 42 0.13% 0.14%
D 33316 29377 51 51 0.15% 0.17%

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 6 16 1107685 3368.81 1507 1478 328.4
A 4 2 46545 137.25 1507 1478 328.4
A 13 254 43606 128.3 1507 1478 328.4
B 7 202 44640 147.25 1530 1490 293.0
B 0 190 40788 134.1 1530 1490 293.0
B 0 189 32978 107.45 1530 1490 293.0
C 7 247 758678 2197.2 1460 1450 344.6
C 2 16 243374 701.98 1460 1450 344.6
C 8 128 13916 36.17 1460 1450 344.6
D 8 195 2121280 6030.24 1493 1435 351.5
D 7 238 915865 2601.24 1493 1435 351.5
D 1 52 708380 2011.02 1493 1435 351.5

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