ASTROSAT CZTI

Data Quality Report

Orbit 16775

Creation date: 2024-06-27T17:27:35.684971
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_004T02_9000002490_16775cztM0_level2.evt modeM0/AS1A05_004T02_9000002490_16775cztM0_level2_quad_clean.evt
Size (bytes)617,932,800100,252,800
Size589.3 MB 95.6 MB
Events in quadrant A3,706,607679,275
Events in quadrant B3,819,577681,073
Events in quadrant C5,353,514633,858
Events in quadrant D5,386,868580,580

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0151743
B0155702
C0206892
D0201582

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66071422.149236%
B66071632.467080%
C66072774.192523%
D660797114.696534%

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 9168 6609 0 0 0.00% 0.00%
B 9168 6610 2 2 0.02% 0.03%
C 9168 6610 8 8 0.09% 0.12%
D 9167 6609 606 606 6.61% 9.17%

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 15 174 81212 432.27 938 924 185.7
A 0 13 13367 66.99 938 924 185.7
A 9 143 9274 44.96 938 924 185.7
B 0 229 54389 310.24 922 902 172.4
B 15 35 50967 290.39 922 902 172.4
B 5 236 48549 276.37 922 902 172.4
C 3 233 1648295 8251.0 867 875 199.7
C 0 207 182971 912.01 867 875 199.7
C 14 238 135244 672.98 867 875 199.7
D 1 52 1924340 9751.94 816 793 197.2
D 12 110 158988 802.01 816 793 197.2
D 2 33 74986 376.14 816 793 197.2

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