ASTROSAT CZTI

Data Quality Report

Orbit 57620

Creation date: 2026-05-23T05:18:03.280044
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_070T08_9000006576_57620cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57620cztM0_level2_quad_clean.evt
Size (bytes)1,349,951,040207,527,040
Size1.3 GB 197.9 MB
Events in quadrant A8,678,0631,325,259
Events in quadrant B9,864,8221,356,729
Events in quadrant C15,040,5941,224,160
Events in quadrant D14,955,3881,100,275

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0389583
B0424793
C0577846
D0574333

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18507950.513319%
B185083601.945105%
C1850713987.553899%
D18507234012.643864%

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 20406 18787 24 24 0.12% 0.13%
B 20407 18788 146 146 0.72% 0.78%
C 20406 18788 1275 1275 6.25% 6.79%
D 20406 18789 2332 2332 11.43% 12.41%

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 605799 1240.68 1985 1933 486.7
A 7 160 171643 348.68 1985 1933 486.7
A 3 128 145198 294.35 1985 1933 486.7
B 5 172 836516 1994.07 1957 1880 418.6
B 10 247 547037 1302.46 1957 1880 418.6
B 7 252 151597 357.7 1957 1880 418.6
C 15 224 4869332 9711.35 1860 1842 501.2
C 9 38 1593222 3175.03 1860 1842 501.2
C 12 2 357514 709.62 1860 1842 501.2
D 15 142 6768016 13560.85 1779 1700 499.0
D 3 224 190593 378.57 1779 1700 499.0
D 5 173 134241 265.63 1779 1700 499.0

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