ASTROSAT CZTI

Data Quality Report

Orbit 31796

Creation date: 2024-06-27T20:32:51.145560
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/AS1T04_041T01_9000004642_31796cztM0_level2.evt modeM0/AS1T04_041T01_9000004642_31796cztM0_level2_quad_clean.evt
Size (bytes)614,226,24074,658,240
Size585.8 MB 71.2 MB
Events in quadrant A4,448,862458,988
Events in quadrant B5,331,411455,490
Events in quadrant C4,187,207431,412
Events in quadrant D4,162,066428,493

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177172
B0212682
C0167202
D0167512

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69764196.006307%
B69761772.537271%
C69763404.873853%
D69761512.164564%

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 7821 6977 211 211 2.70% 3.02%
B 7821 6977 7 7 0.09% 0.10%
C 7821 6977 60 60 0.77% 0.86%
D 7821 6977 72 72 0.92% 1.03%

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 1150328 6675.3 853 837 172.2
A 13 254 12148 65.69 853 837 172.2
A 3 137 9081 47.87 853 837 172.2
B 6 159 1817122 10924.78 856 834 166.3
B 10 245 116604 696.34 856 834 166.3
B 12 111 21227 122.66 856 834 166.3
C 0 10 639581 3290.77 815 820 194.1
C 14 238 160861 824.5 815 820 194.1
C 3 233 137446 703.87 815 820 194.1
D 8 195 569223 2788.19 836 811 203.9
D 1 52 169276 826.36 836 811 203.9
D 2 250 121519 592.1 836 811 203.9

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