ASTROSAT CZTI

Data Quality Report

Orbit 56821

Creation date: 2026-03-30T11:46:11.892197
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_083T03_9000006562_56821cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56821cztM0_level2_quad_clean.evt
Size (bytes)1,611,610,560247,677,120
Size1.5 GB 236.2 MB
Events in quadrant A13,080,5161,700,840
Events in quadrant B22,270,6251,382,043
Events in quadrant C9,891,0881,619,576
Events in quadrant D12,968,7541,506,951

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0519413
B0790353
C0432303
D0521223

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187213872.067197%
B18721482425.767854%
C187223491.864117%
D187226073.242175%

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 20356 18724 125 125 0.61% 0.67%
B 20356 18724 3377 3377 16.59% 18.04%
C 20357 18725 130 130 0.64% 0.69%
D 20357 18725 604 604 2.97% 3.23%

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 3 14 4251586 8743.38 1974 1924 486.0
A 10 251 684660 1404.68 1974 1924 486.0
A 4 249 355127 726.69 1974 1924 486.0
B 4 206 9669745 26085.29 1735 1670 370.6
B 5 185 2655842 7161.18 1735 1670 370.6
B 5 172 1392709 3753.14 1735 1670 370.6
C 13 3 975577 1843.8 1931 1906 528.1
C 9 38 516363 974.21 1931 1906 528.1
C 12 249 322239 606.6 1931 1906 528.1
D 15 142 4317082 8071.98 1909 1823 534.6
D 2 31 477517 889.82 1909 1823 534.6
D 2 249 287808 534.95 1909 1823 534.6

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