ASTROSAT CZTI

Data Quality Report

Orbit 55847

Creation date: 2026-01-24T14:06:56.497537
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_127T10_9000006542_55847cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55847cztM0_level2_quad_clean.evt
Size (bytes)1,425,761,280249,917,760
Size1.3 GB 238.3 MB
Events in quadrant A11,919,6041,608,284
Events in quadrant B8,736,6031,818,264
Events in quadrant C8,699,7871,654,277
Events in quadrant D21,969,2701,193,438

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0479352
B0405292
C0406972
D0782792

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03780
B03780
C03780
D03780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1875511506.131698%
B187564152.212625%
C187561891.007678%
D18756407021.699723%

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 19679 18754 816 816 4.15% 4.35%
B 19681 18756 96 96 0.49% 0.51%
C 19681 18756 119 119 0.60% 0.63%
D 19681 18756 3758 3758 19.09% 20.04%

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 8 206 1323308 2806.33 1904 1861 470.9
A 8 249 745002 1578.19 1904 1861 470.9
A 8 192 641294 1357.95 1904 1861 470.9
B 5 185 502888 1189.78 1933 1859 421.1
B 7 0 169307 397.63 1933 1859 421.1
B 0 171 77924 180.63 1933 1859 421.1
C 12 252 496269 944.3 1910 1893 523.5
C 13 3 147751 278.6 1910 1893 523.5
C 6 223 120837 227.19 1910 1893 523.5
D 11 129 9551115 19465.9 1714 1640 490.6
D 8 245 3328240 6781.03 1714 1640 490.6
D 2 62 496378 1008.49 1714 1640 490.6

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