ASTROSAT CZTI

Data Quality Report

Orbit 55800

Creation date: 2026-01-20T18:22:05.237664
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_55800cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55800cztM0_level2_quad_clean.evt
Size (bytes)609,140,16094,389,120
Size580.9 MB 90.0 MB
Events in quadrant A9,755,591454,205
Events in quadrant B3,149,977703,512
Events in quadrant C5,218,816589,568
Events in quadrant D3,854,637600,192

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0339810
B0153160
C0212730
D0170510

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7328243633.242358%
B7329190.259244%
C73296488.841588%
D7329570.777732%

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 7328 7327 1961 1961 26.76% 26.76%
B 7329 7329 14 14 0.19% 0.19%
C 7329 7329 498 498 6.79% 6.79%
D 7329 7329 63 63 0.86% 0.86%

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 15 32 6097097 42346.52 571 558 144.0
A 7 64 482781 3349.52 571 558 144.0
A 12 115 354058 2455.41 571 558 144.0
B 4 206 142686 929.1 696 671 152.9
B 0 213 112533 731.83 696 671 152.9
B 5 172 65872 426.56 696 671 152.9
C 13 3 2529624 13855.02 654 648 182.5
C 14 254 48400 261.61 654 648 182.5
C 6 223 26784 143.19 654 648 182.5
D 8 245 475616 2402.96 688 658 197.7
D 11 129 202148 1019.4 688 658 197.7
D 7 70 186011 937.76 688 658 197.7

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