ASTROSAT CZTI

Data Quality Report

Orbit 55549

Creation date: 2026-01-03T19:50:22.839399
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_55549cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55549cztM0_level2_quad_clean.evt
Size (bytes)357,566,40075,885,120
Size341.0 MB 72.4 MB
Events in quadrant A2,428,342506,057
Events in quadrant B3,611,572520,598
Events in quadrant C3,501,467454,345
Events in quadrant D3,280,079444,905

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123131007
B0158841471
C0156541507
D0148531278

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01144
B011412
C011410
D011410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5351721.345543%
B52662114.006836%
C52912765.216405%
D53281763.303303%

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 7627 5667 17 17 0.22% 0.30%
B 7624 5617 107 107 1.40% 1.90%
C 7625 5605 235 235 3.08% 4.19%
D 7626 5650 121 121 1.59% 2.14%

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 0 8 101044 721.72 562 547 139.2
A 4 159 49046 348.3 562 547 139.2
A 3 78 23390 164.05 562 547 139.2
B 4 206 1281436 11205.63 540 522 114.3
B 10 247 80064 695.85 540 522 114.3
B 7 252 47780 413.42 540 522 114.3
C 9 38 942236 6471.28 526 519 145.5
C 13 3 192087 1316.41 526 519 145.5
C 1 16 126569 866.19 526 519 145.5
D 11 129 464494 3053.08 535 512 152.0
D 8 160 203408 1335.09 535 512 152.0
D 3 12 172600 1132.37 535 512 152.0

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