ASTROSAT CZTI

Data Quality Report

Orbit 20181022_C04_001T01_9000002446_level2

Creation date: 2025-11-25T07:53:03.223563
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/AS1C04_001T01_9000002446cztM0_level2.fits modeM0/AS1C04_001T01_9000002446cztM0_level2_quad_clean.evt
Size (bytes)495,480,960659,543,040
Size472.5 MB 629.0 MB
Events in quadrant A3,009,5044,278,346
Events in quadrant B2,894,4304,259,703
Events in quadrant C2,976,9704,117,763
Events in quadrant D2,540,2323,737,417

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010600
B010600
C010600
D010600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01136310
B01183860
C01208810
D01211050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A522318311.591009%
B522319171.755662%
C522318581.642703%
D5223121914.194827%

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 60583 52228 0 0 0.00% 0.00%
B 60583 52232 0 0 0.00% 0.00%
C 60583 52232 0 0 0.00% 0.00%
D 60583 51885 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 2866 11.07 782 737 192.3
A 7 110 2484 9.08 782 737 192.3
A 9 19 2373 8.51 782 737 192.3
B 2 9 2351 10.86 767 735 148.9
B 2 8 2008 8.55 767 735 148.9
B 3 17 1905 7.86 767 735 148.9
C 2 191 2107 6.72 787 737 203.8
C 12 241 2078 6.58 787 737 203.8
C 9 233 1969 6.05 787 737 203.8
D 3 14 1875 6.29 724 660 193.0
D 6 231 1837 6.1 724 660 193.0
D 10 189 1801 5.91 724 660 193.0

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