ASTROSAT CZTI

Data Quality Report

Orbit 16798

Creation date: 2024-06-27T17:27:44.992997
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/AS1A05_004T04_9000002494_16798cztM0_level2.evt modeM0/AS1A05_004T04_9000002494_16798cztM0_level2_quad_clean.evt
Size (bytes)1,244,796,480172,526,400
Size1.2 GB 164.5 MB
Events in quadrant A10,049,4231,067,175
Events in quadrant B6,986,6761,127,019
Events in quadrant C8,206,7971,083,844
Events in quadrant D11,536,3621,004,415

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390404
B0297073
C0335933
D0436793

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1364312469.132889%
B136431360.996848%
C136432882.110973%
D1364313449.851206%

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 15274 13647 1058 1058 6.93% 7.75%
B 15274 13647 20 20 0.13% 0.15%
C 15274 13647 2 2 0.01% 0.01%
D 15274 13647 928 928 6.08% 6.80%

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 15 174 3889614 12300.84 1566 1530 316.1
A 10 234 63585 196.33 1566 1530 316.1
A 9 143 36213 109.73 1566 1530 316.1
B 0 229 305460 979.08 1621 1578 310.4
B 15 35 157707 503.03 1621 1578 310.4
B 0 189 81766 258.36 1621 1578 310.4
C 3 233 1683101 4615.47 1562 1573 364.3
C 14 238 238186 649.46 1562 1573 364.3
C 0 207 154515 419.8 1562 1573 364.3
D 1 52 4894984 13297.08 1515 1472 368.0
D 12 218 496575 1345.34 1515 1472 368.0
D 13 248 290073 784.21 1515 1472 368.0

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