ASTROSAT CZTI

Data Quality Report

Orbit 51438

Creation date: 2025-04-03T13:05:51.653878
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_51438cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51438cztM0_level2_quad_clean.evt
Size (bytes)775,267,20083,088,000
Size739.4 MB 79.2 MB
Events in quadrant A6,451,655575,072
Events in quadrant B4,186,932670,912
Events in quadrant C12,774,460256,962
Events in quadrant D4,778,420557,213

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0235934
B0168722
C0423942
D0188492

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A653395914.679320%
B65344436.779920%
C6534409962.733395%
D65344166.366697%

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 8793 6533 629 629 7.15% 9.63%
B 8794 6534 187 187 2.13% 2.86%
C 8794 6534 3947 3947 44.88% 60.41%
D 8794 6535 306 306 3.48% 4.68%

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 1336494 7726.88 705 688 172.9
A 12 3 1088755 6293.85 705 688 172.9
A 15 174 507873 2933.78 705 688 172.9
B 0 172 302265 1942.67 723 697 155.2
B 5 172 284701 1829.53 723 697 155.2
B 4 206 227080 1458.34 723 697 155.2
C 4 12 7927196 64018.97 442 438 123.8
C 0 176 1516068 12240.7 442 438 123.8
C 15 179 634889 5124.02 442 438 123.8
D 6 42 857277 4411.5 688 663 194.2
D 8 176 553099 2845.01 688 663 194.2
D 13 170 112609 576.51 688 663 194.2

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