ASTROSAT CZTI

Data Quality Report

Orbit 20181219_A05_068T01_9000002580_level2

Creation date: 2025-11-26T17:20:16.273767
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/AS1A05_068T01_9000002580cztM0_level2.fits modeM0/AS1A05_068T01_9000002580cztM0_level2_quad_clean.evt
Size (bytes)459,264,960405,190,080
Size438.0 MB 386.4 MB
Events in quadrant A2,876,3362,439,520
Events in quadrant B2,739,7822,393,143
Events in quadrant C2,806,7562,276,254
Events in quadrant D2,468,6942,143,933

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0934360
B0949310
C0975670
D01071180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08940
B08940
C08940
D08940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A439655091.157739%
B439656751.535312%
C439657981.815080%
D439658852.012965%

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 51924 43962 0 0 0.00% 0.00%
B 51924 43961 0 0 0.00% 0.00%
C 51924 43964 0 0 0.00% 0.00%
D 51924 43963 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 2801 11.44 749 706 183.2
A 7 110 2300 8.7 749 706 183.2
A 0 30 2189 8.1 749 706 183.2
B 2 9 2136 10.0 725 694 144.1
B 2 8 1878 8.21 725 694 144.1
B 5 128 1776 7.51 725 694 144.1
C 1 81 2121 7.48 742 699 190.0
C 1 80 2114 7.45 742 699 190.0
C 3 126 1945 6.56 742 699 190.0
D 6 231 1766 6.04 705 647 185.3
D 15 46 1714 5.76 705 647 185.3
D 10 189 1712 5.75 705 647 185.3

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