ASTROSAT CZTI

Data Quality Report

Orbit 20220805_A09_026T06_9000005278_level2

Creation date: 2022-08-06T12:45:44.592906
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/AS1A09_026T06_9000005278cztM0_level2_bc.evt modeM0/AS1A09_026T06_9000005278cztM0_level2_quad_clean.evt
Size (bytes)956,168,640229,512,960
Size911.9 MB 218.9 MB
Events in quadrant A4,794,8281,458,657
Events in quadrant B6,788,6251,409,800
Events in quadrant C5,705,2271,428,714
Events in quadrant D10,340,9711,313,877

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0430
C0430
D0430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410840
B0515140
C0438320
D0625560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19442410.210884%
B194428794.521140%
C194422971.527621%
D1944215187.807839%

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 23621 19445 4 4 0.02% 0.02%
B 23620 19438 41 41 0.17% 0.21%
C 23620 19441 74 74 0.31% 0.38%
D 23619 19437 227 227 0.96% 1.17%

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 10 83 741090 3389.59 968 950 218.4
A 9 143 160854 732.31 968 950 218.4
A 13 6 32727 145.53 968 950 218.4
B 5 184 1047974 5543.53 948 927 188.9
B 5 172 986731 5219.28 948 927 188.9
B 0 190 263560 1390.5 948 927 188.9
C 15 214 774294 3479.66 950 942 222.2
C 14 254 551685 2478.04 950 942 222.2
C 0 207 250040 1120.8 950 942 222.2
D 1 52 1556940 6861.6 934 903 226.8
D 12 235 1124145 4953.12 934 903 226.8
D 6 112 1092177 4812.15 934 903 226.8

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