ASTROSAT CZTI

Data Quality Report

Orbit 55658

Creation date: 2026-01-12T10:55:44.748702
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/AS1A14_021T06_9000006538_55658cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55658cztM0_level2_quad_clean.evt
Size (bytes)1,186,444,800258,333,120
Size1.1 GB 246.4 MB
Events in quadrant A10,549,5591,669,123
Events in quadrant B8,469,2141,801,867
Events in quadrant C9,261,1461,597,722
Events in quadrant D14,193,9391,467,327

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0449823
B0397803
C0421333
D0552613

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A186573551.902771%
B186572101.125583%
C186572971.591896%
D186588554.582485%

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 20022 18660 246 246 1.23% 1.32%
B 20022 18660 54 54 0.27% 0.29%
C 20022 18660 219 219 1.09% 1.17%
D 20023 18661 968 968 4.83% 5.19%

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 8 249 825847 1752.01 1908 1864 470.3
A 0 8 698674 1481.6 1908 1864 470.3
A 3 14 684469 1451.4 1908 1864 470.3
B 5 172 704066 1738.49 1896 1824 403.9
B 7 252 102013 248.03 1896 1824 403.9
B 12 111 49425 117.84 1896 1824 403.9
C 12 250 832427 1628.28 1867 1848 510.1
C 6 223 290577 566.03 1867 1848 510.1
C 13 3 261990 509.99 1867 1848 510.1
D 8 245 4734365 9087.55 1849 1769 520.8
D 7 70 636961 1219.7 1849 1769 520.8
D 11 129 472712 904.31 1849 1769 520.8

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