ASTROSAT CZTI

Data Quality Report

Orbit 20180611_A04_016T01_9000002152_level2

Creation date: 2025-11-22T20:09:12.535512
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_016T01_9000002152cztM0_level2.fits modeM0/AS1A04_016T01_9000002152cztM0_level2_quad_clean.evt
Size (bytes)532,506,240469,304,640
Size507.8 MB 447.6 MB
Events in quadrant A3,251,2182,756,675
Events in quadrant B3,162,7582,752,215
Events in quadrant C3,238,5642,598,841
Events in quadrant D2,798,4342,428,940

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010920
B010920
C010920
D010920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170730
B01142960
C01335470
D01297540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01070
B01070
C01070
D01070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A535816351.185122%
B535817871.468804%
C535815941.108602%
D5358118273.409791%

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 64197 53576 0 0 0.00% 0.00%
B 64197 53575 0 0 0.00% 0.00%
C 64197 53575 0 0 0.00% 0.00%
D 64197 53526 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 3055 10.57 847 793 214.0
A 7 110 2661 8.73 847 793 214.0
A 15 236 2475 7.86 847 793 214.0
B 2 9 2652 11.1 833 795 167.3
B 3 17 2175 8.25 833 795 167.3
B 5 128 2078 7.67 833 795 167.3
C 1 81 2346 7.12 854 799 217.4
C 1 80 2329 7.04 854 799 217.4
C 12 241 2249 6.67 854 799 217.4
D 3 14 2079 6.27 799 727 215.5
D 6 231 2047 6.13 799 727 215.5
D 6 38 1914 5.51 799 727 215.5

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