ASTROSAT CZTI

Data Quality Report

Orbit 20180412_G08_062T01_9000002038_level2

Creation date: 2025-11-21T17:45:06.839571
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/AS1G08_062T01_9000002038cztM0_level2.fits modeM0/AS1G08_062T01_9000002038cztM0_level2_quad_clean.evt
Size (bytes)1,970,136,0002,049,448,320
Size1.8 GB 1.9 GB
Events in quadrant A11,981,43412,353,069
Events in quadrant B11,501,31811,993,551
Events in quadrant C11,928,91012,359,476
Events in quadrant D10,187,79211,304,074

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03330
B03330
C03330
D03330

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04402990
B04550800
C04528560
D05461730

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A041820
B041820
C041820
D041820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A20529232761.595776%
B20529236691.787210%
C20529239981.947470%
D20529273303.570524%

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 238802 205277 0 0 0.00% 0.00%
B 238802 205270 0 0 0.00% 0.00%
C 238802 205272 0 0 0.00% 0.00%
D 238802 205209 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 11498 10.87 3120 2912 790.2
A 7 110 9729 8.63 3120 2912 790.2
A 9 19 9447 8.27 3120 2912 790.2
B 2 9 9915 11.91 3035 2887 590.0
B 3 17 7519 7.85 3035 2887 590.0
B 14 254 7518 7.85 3035 2887 590.0
C 12 250 8782 7.14 3152 2933 818.9
C 1 65 8605 6.93 3152 2933 818.9
C 12 241 8399 6.67 3152 2933 818.9
D 4 246 8435 7.45 2908 2644 776.9
D 6 231 7452 6.19 2908 2644 776.9
D 3 14 7341 6.05 2908 2644 776.9

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