ASTROSAT CZTI

Data Quality Report

Orbit 55587

Creation date: 2026-01-06T14:09:46.696940
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_55587cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55587cztM0_level2_quad_clean.evt
Size (bytes)422,959,68099,555,840
Size403.4 MB 94.9 MB
Events in quadrant A4,837,118615,921
Events in quadrant B3,043,377696,953
Events in quadrant C3,280,766622,051
Events in quadrant D3,942,705584,390

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0196242
B0147072
C0154702
D0168842

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71034165.856680%
B7102530.746269%
C7103781.098128%
D71031341.886527%

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 8783 7105 356 356 4.05% 5.01%
B 8782 7104 23 23 0.26% 0.32%
C 8783 7105 55 55 0.63% 0.77%
D 8783 7105 159 159 1.81% 2.24%

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 12 115 1681185 9588.66 704 685 175.3
A 8 249 106660 604.68 704 685 175.3
A 0 8 98050 555.55 704 685 175.3
B 4 169 90782 585.45 717 690 153.9
B 0 182 30528 193.9 717 690 153.9
B 7 252 30050 190.79 717 690 153.9
C 13 3 142736 739.9 703 696 192.0
C 12 252 140591 728.72 703 696 192.0
C 6 223 92666 479.08 703 696 192.0
D 8 160 401886 2013.28 697 665 199.3
D 11 129 341693 1711.24 697 665 199.3
D 5 113 108263 539.91 697 665 199.3

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