ASTROSAT CZTI

Data Quality Report

Orbit 55861

Creation date: 2026-01-24T20:54:36.884406
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_030T02_9000006544_55861cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55861cztM0_level2_quad_clean.evt
Size (bytes)542,056,320111,476,160
Size516.9 MB 106.3 MB
Events in quadrant A3,965,488718,987
Events in quadrant B3,876,636779,265
Events in quadrant C4,179,553692,004
Events in quadrant D7,427,656633,277

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173290
B0169180
C0183881
D0277960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7938660.831444%
B7938660.831444%
C79381141.436130%
D79383985.013857%

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 7938 7938 54 54 0.68% 0.68%
B 7938 7938 15 15 0.19% 0.19%
C 7938 7938 122 122 1.54% 1.54%
D 7938 7938 486 486 6.12% 6.12%

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 7 64 254421 1257.89 818 798 201.6
A 0 8 200610 991.0 818 798 201.6
A 15 32 99328 488.68 818 798 201.6
B 0 197 203941 1154.94 814 782 175.9
B 7 0 145813 824.49 814 782 175.9
B 0 171 84080 473.54 814 782 175.9
C 12 250 437073 1987.73 797 789 219.5
C 12 252 235756 1070.52 797 789 219.5
C 14 96 125209 566.86 797 789 219.5
D 2 62 2743290 12378.37 783 747 221.6
D 11 129 1158819 5226.92 783 747 221.6
D 3 12 225464 1014.25 783 747 221.6

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