ASTROSAT CZTI

Data Quality Report

Orbit 50542

Creation date: 2025-01-31T18:04:02.156687
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/AS1T05_239T01_9000006444_50542cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50542cztM0_level2_quad_clean.evt
Size (bytes)1,133,789,76073,082,880
Size1.1 GB 69.7 MB
Events in quadrant A5,735,943638,325
Events in quadrant B3,956,236732,909
Events in quadrant C15,157,452167,847
Events in quadrant D16,555,883165,332

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218810
B0166240
C0500364
D0541520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72955086.963674%
B7295901.233722%
C7294565577.529476%
D7294559176.652043%

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 7295 7295 348 348 4.77% 4.77%
B 7295 7295 53 53 0.73% 0.73%
C 7294 7294 4558 4558 62.49% 62.49%
D 7293 7293 5300 5300 72.67% 72.67%

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 12 250 1251135 6604.69 757 738 189.3
A 3 130 448504 2365.13 757 738 189.3
A 4 3 175699 924.16 757 738 189.3
B 4 170 166629 1012.71 763 738 163.8
B 8 128 104115 631.08 763 738 163.8
B 4 206 81825 495.01 763 738 163.8
C 15 157 3902836 35871.03 386 384 108.8
C 4 12 1654828 15207.52 386 384 108.8
C 15 174 1109454 10194.48 386 384 108.8
D 7 61 6286528 49255.58 445 429 127.6
D 15 184 2886146 22611.43 445 429 127.6
D 6 42 1582280 12394.81 445 429 127.6

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