ASTROSAT CZTI

Data Quality Report

Orbit 20180509_A04_218T04_9000002086_level2

Creation date: 2025-11-22T07:08:54.406581
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/AS1A04_218T04_9000002086cztM0_level2.fits modeM0/AS1A04_218T04_9000002086cztM0_level2_quad_clean.evt
Size (bytes)623,744,640574,295,040
Size594.8 MB 547.7 MB
Events in quadrant A3,867,0183,385,480
Events in quadrant B3,693,7383,326,589
Events in quadrant C3,793,1623,336,654
Events in quadrant D3,160,5582,969,817

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01335600
B01371690
C01362010
D02006240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012960
B012960
C012960
D012960

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0940
B0940
C0960
D0960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A637847751.215038%
B637869401.473678%
C637796120.959563%
D6378156338.831784%

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 76150 63805 0 0 0.00% 0.00%
B 76150 63805 0 0 0.00% 0.00%
C 76150 63805 0 0 0.00% 0.00%
D 76150 63695 0 0 0.00% 0.00%

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 29 3743 11.16 1007 942 251.0
A 7 110 3021 8.28 1007 942 251.0
A 9 19 2808 7.43 1007 942 251.0
B 2 9 3121 11.29 974 928 194.3
B 3 17 2443 7.8 974 928 194.3
B 3 80 2409 7.62 974 928 194.3
C 12 241 2700 6.87 1001 933 257.2
C 2 191 2587 6.43 1001 933 257.2
C 3 126 2529 6.21 1001 933 257.2
D 3 14 2328 6.3 901 819 239.5
D 6 231 2292 6.15 901 819 239.5
D 1 19 2189 5.72 901 819 239.5

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