ASTROSAT CZTI

Data Quality Report

Orbit 51946

Creation date: 2025-05-06T11:00:08.029951
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/AS1C09_011T06_9000006468_51946cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51946cztM0_level2_quad_clean.evt
Size (bytes)924,215,04070,954,560
Size881.4 MB 67.7 MB
Events in quadrant A8,530,442451,026
Events in quadrant B3,788,798659,665
Events in quadrant C8,798,515465,012
Events in quadrant D12,590,695118,661

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298554
B0158822
C0306012
D0418462

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6493192529.647312%
B64942143.295350%
C6494191329.457961%
D6494538382.891900%

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 7568 6494 1715 1715 22.66% 26.41%
B 7569 6495 82 82 1.08% 1.26%
C 7569 6495 1742 1742 23.01% 26.82%
D 7569 6495 3598 3598 47.54% 55.40%

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 4 159 3231563 23214.72 552 538 139.2
A 7 64 2040934 14660.13 552 538 139.2
A 4 249 241678 1732.58 552 538 139.2
B 12 32 195267 1375.28 670 645 141.5
B 0 216 153924 1083.13 670 645 141.5
B 4 206 128524 903.64 670 645 141.5
C 15 224 5526229 33702.1 578 572 164.0
C 15 147 323774 1971.27 578 572 164.0
C 13 3 149939 911.02 578 572 164.0
D 12 17 8615942 112289.94 262 248 76.7
D 6 42 2082490 27138.25 262 248 76.7
D 3 12 341842 4452.06 262 248 76.7

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