ASTROSAT CZTI

Data Quality Report

Orbit 51464

Creation date: 2025-04-03T20:07:39.543033
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/AS1A13_090T01_9000006458_51464cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51464cztM0_level2_quad_clean.evt
Size (bytes)615,225,60088,980,480
Size586.7 MB 84.9 MB
Events in quadrant A8,818,934476,182
Events in quadrant B4,322,339648,100
Events in quadrant C3,282,351592,873
Events in quadrant D5,851,125527,689

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0306201
B0171591
C0145461
D0218171

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6433184228.633608%
B64343074.771526%
C64341342.082686%
D64345268.175319%

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 7463 6434 1514 1514 20.29% 23.53%
B 7464 6435 114 114 1.53% 1.77%
C 7464 6435 75 75 1.00% 1.17%
D 7464 6435 482 482 6.46% 7.49%

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 8 249 2203890 13815.72 649 635 159.5
A 12 3 1041161 6524.72 649 635 159.5
A 12 250 950705 5957.5 649 635 159.5
B 8 234 339261 2301.36 688 665 147.1
B 4 206 316902 2149.39 688 665 147.1
B 10 254 261781 1774.75 688 665 147.1
C 13 3 278369 1497.69 681 676 185.4
C 14 254 140335 753.23 681 676 185.4
C 12 250 107575 576.54 681 676 185.4
D 8 176 1190849 6370.09 666 642 186.8
D 3 12 970960 5193.22 666 642 186.8
D 6 42 324028 1730.79 666 642 186.8

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