ASTROSAT CZTI

Data Quality Report

Orbit 51795

Creation date: 2025-04-26T04:09:43.224730
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_51795cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51795cztM0_level2_quad_clean.evt
Size (bytes)718,102,08091,074,240
Size684.8 MB 86.9 MB
Events in quadrant A8,456,518562,538
Events in quadrant B4,331,882675,026
Events in quadrant C4,653,477586,145
Events in quadrant D8,610,611456,451

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0299942
B0176532
C0187992
D0303402

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A684399314.511179%
B68432573.755663%
C68444286.253653%
D6844167124.415546%

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 7663 6844 891 891 11.63% 13.02%
B 7663 6843 124 124 1.62% 1.81%
C 7664 6845 399 399 5.21% 5.83%
D 7664 6845 1603 1603 20.92% 23.42%

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 15 174 2053054 11958.96 686 668 171.6
A 12 3 1736888 10116.71 686 668 171.6
A 10 253 414953 2413.98 686 668 171.6
B 10 128 389726 2526.36 718 694 154.0
B 0 171 247324 1601.61 718 694 154.0
B 7 252 238326 1543.18 718 694 154.0
C 15 218 876815 4605.54 692 684 190.2
C 13 3 525303 2757.75 692 684 190.2
C 15 231 152001 795.42 692 684 190.2
D 11 129 4367996 24842.95 627 604 175.8
D 12 6 428993 2436.8 627 604 175.8
D 8 176 331408 1881.71 627 604 175.8

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