ASTROSAT CZTI

Data Quality Report

Orbit 56839

Creation date: 2026-03-31T14:36:01.992499
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_083T03_9000006562_56839cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56839cztM0_level2_quad_clean.evt
Size (bytes)616,677,12090,118,080
Size588.1 MB 85.9 MB
Events in quadrant A6,548,633619,882
Events in quadrant B4,413,797657,956
Events in quadrant C7,633,673434,622
Events in quadrant D3,733,293568,017

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240131
B0173341
C0271621
D0155231

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64262934.559602%
B64263595.586679%
C6427191329.765054%
D64271602.489497%

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 7506 6427 176 176 2.34% 2.74%
B 7506 6427 212 212 2.82% 3.30%
C 7507 6427 1740 1740 23.18% 27.07%
D 7507 6428 118 118 1.57% 1.84%

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 3086631 17962.78 698 681 171.8
A 10 251 416453 2420.14 698 681 171.8
A 12 3 165435 959.0 698 681 171.8
B 5 185 933118 6356.75 683 658 146.7
B 10 16 251238 1708.25 683 658 146.7
B 0 197 160920 1092.54 683 658 146.7
C 12 249 5085627 30964.24 597 591 164.2
C 12 252 59015 355.76 597 591 164.2
C 6 13 34001 203.44 597 591 164.2
D 8 240 631709 3310.67 684 654 190.6
D 2 249 238088 1245.64 684 654 190.6
D 5 173 51784 268.24 684 654 190.6

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