ASTROSAT CZTI

Data Quality Report

Orbit 20210221_A10_053T41_9000004194_level2

Creation date: 2021-02-22T10:24:28.732761
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/AS1A10_053T41_9000004194cztM0_level2_bc.evt modeM0/AS1A10_053T41_9000004194cztM0_level2_quad_clean.evt
Size (bytes)685,684,800104,247,360
Size653.9 MB 99.4 MB
Events in quadrant A1,934,988667,986
Events in quadrant B2,410,649673,377
Events in quadrant C11,694,393551,449
Events in quadrant D4,081,182611,167

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01920
B01920
C01920
D01920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191440
B0211330
C0508270
D0267470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9399480.510693%
B93991701.808703%
C9399350737.312480%
D93993453.670603%

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 10293 9398 0 0 0.00% 0.00%
B 10293 9398 4 4 0.04% 0.04%
C 10293 9399 503 503 4.89% 5.35%
D 10293 9398 22 22 0.21% 0.23%

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 13 32914 303.16 490 481 107.0
A 13 254 17225 156.51 490 481 107.0
A 12 194 3282 26.18 490 481 107.0
B 10 246 139404 1466.33 496 484 94.7
B 10 245 124420 1308.17 496 484 94.7
B 0 229 111594 1172.79 496 484 94.7
C 3 233 10018054 98544.1 424 420 101.7
C 9 54 26379 255.36 424 420 101.7
C 2 114 17164 164.71 424 420 101.7
D 1 52 1057510 9691.36 473 456 109.1
D 8 195 964801 8841.38 473 456 109.1
D 7 80 53006 481.79 473 456 109.1

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