ASTROSAT CZTI

Data Quality Report

Orbit 26257

Creation date: 2024-06-27T19:26:40.965913
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/AS1A09_079T03_9000003790_26257cztM0_level2.evt modeM0/AS1A09_079T03_9000003790_26257cztM0_level2_quad_clean.evt
Size (bytes)442,114,560114,324,480
Size421.6 MB 109.0 MB
Events in quadrant A3,200,447750,699
Events in quadrant B3,239,293790,344
Events in quadrant C3,370,068761,229
Events in quadrant D3,162,523731,678

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0133590
B0134450
C0139360
D0135310

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6144240.390625%
B6144350.569661%
C6144921.497396%
D6143230.374410%

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 7514 6145 7 7 0.09% 0.11%
B 7514 6145 1 1 0.01% 0.02%
C 7514 6145 13 13 0.17% 0.21%
D 7513 6144 11 11 0.15% 0.18%

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 109384 680.67 801 788 159.5
A 13 254 10162 58.76 801 788 159.5
A 0 226 6875 38.15 801 788 159.5
B 5 172 30027 195.67 816 799 149.4
B 12 111 17278 110.32 816 799 149.4
B 11 111 15052 95.42 816 799 149.4
C 4 254 129945 705.07 790 798 183.2
C 14 238 129078 700.33 790 798 183.2
C 3 233 15766 81.72 790 798 183.2
D 1 52 68063 366.82 779 762 183.5
D 12 233 58947 317.13 779 762 183.5
D 15 0 40522 216.71 779 762 183.5

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