ASTROSAT CZTI

Data Quality Report

Orbit 20211127_A10_090T11_9000004784_level2

Creation date: 2021-12-04T12:10:47.819064
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/AS1A10_090T11_9000004784cztM0_level2_bc.evt modeM0/AS1A10_090T11_9000004784cztM0_level2_quad_clean.evt
Size (bytes)1,946,021,760449,412,480
Size1.8 GB 428.6 MB
Events in quadrant A6,711,2603,099,174
Events in quadrant B11,805,1382,981,835
Events in quadrant C15,913,8852,843,153
Events in quadrant D22,617,6552,775,730

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0589660
B0833710
C0945350
D01161970

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05660
B05660
C05660
D05660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A27794730.262647%
B2779422938.249982%
C27794311511.207455%
D2779427649.944592%

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 39662 27795 7 7 0.02% 0.03%
B 39661 27793 235 235 0.59% 0.85%
C 39661 27793 940 940 2.37% 3.38%
D 39661 27793 489 489 1.23% 1.76%

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 0 254 217150 602.81 1645 1626 357.5
A 13 254 43399 116.84 1645 1626 357.5
A 13 6 42755 115.04 1645 1626 357.5
B 5 172 2194469 7036.55 1601 1574 311.6
B 0 219 2056519 6593.9 1601 1574 311.6
B 4 170 519670 1662.46 1601 1574 311.6
C 1 23 5477544 16292.73 1502 1504 336.1
C 10 49 2442599 7262.93 1502 1504 336.1
C 15 214 1169626 3475.48 1502 1504 336.1
D 8 195 9631991 24056.7 1535 1505 400.3
D 2 250 1450725 3620.11 1535 1505 400.3
D 1 52 1377857 3438.09 1535 1505 400.3

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