ASTROSAT CZTI

Data Quality Report

Orbit 51812

Creation date: 2025-04-27T06:07:48.403620
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_9000006464_51812cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51812cztM0_level2_quad_clean.evt
Size (bytes)652,573,440102,130,560
Size622.3 MB 97.4 MB
Events in quadrant A5,550,523669,300
Events in quadrant B4,030,471749,810
Events in quadrant C4,190,844663,561
Events in quadrant D9,819,530502,636

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0214773
B0171072
C0176872
D0342402

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72883414.678924%
B72881872.565862%
C72881772.428650%
D7289175924.132254%

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 9253 7290 287 287 3.10% 3.94%
B 9253 7290 61 61 0.66% 0.84%
C 9253 7290 151 151 1.63% 2.07%
D 9254 7291 1638 1638 17.70% 22.47%

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 4 175 933585 4917.73 774 753 189.7
A 15 174 792290 4172.84 774 753 189.7
A 12 3 145619 763.71 774 753 189.7
B 0 171 215118 1276.6 784 756 167.9
B 0 213 141119 835.91 784 756 167.9
B 4 81 92415 545.86 784 756 167.9
C 12 254 426070 1992.46 772 768 213.5
C 13 3 219652 1025.43 772 768 213.5
C 14 254 81886 380.02 772 768 213.5
D 11 129 4891521 25400.88 682 657 192.5
D 0 18 1149623 5967.2 682 657 192.5
D 3 12 612755 3178.95 682 657 192.5

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