ASTROSAT CZTI

Data Quality Report

Orbit 51437

Creation date: 2025-04-03T12:46:26.950622
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_51437cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51437cztM0_level2_quad_clean.evt
Size (bytes)583,410,24092,620,800
Size556.4 MB 88.3 MB
Events in quadrant A5,877,897586,730
Events in quadrant B3,784,621690,039
Events in quadrant C6,951,249515,808
Events in quadrant D4,483,664564,300

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0217972
B0155712
C0250674
D0177702

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0240
C0240
D0240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A642685813.352007%
B64262784.326175%
C6425131820.513619%
D64253325.167315%

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 7576 6426 690 690 9.11% 10.74%
B 7576 6426 118 118 1.56% 1.84%
C 7574 6424 1115 1115 14.72% 17.36%
D 7575 6425 238 238 3.14% 3.70%

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 7 64 2070293 12198.16 697 680 169.7
A 4 175 313550 1844.04 697 680 169.7
A 12 250 238859 1403.81 697 680 169.7
B 4 206 338298 2230.4 715 691 151.4
B 0 172 131024 861.04 715 691 151.4
B 5 185 90524 593.48 715 691 151.4
C 0 176 1606770 9377.79 627 621 171.3
C 4 12 1174921 6856.36 627 621 171.3
C 10 171 701605 4092.82 627 621 171.3
D 6 42 1041965 5434.24 680 656 191.6
D 8 176 151457 786.98 680 656 191.6
D 0 113 111484 578.37 680 656 191.6

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