ASTROSAT CZTI

Data Quality Report

Orbit 35431

Creation date: 2022-04-20T21:52:53.259492
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/AS1A11_097T07_9000005072_35431cztM0_level2.evt modeM0/AS1A11_097T07_9000005072_35431cztM0_level2_quad_clean.evt
Size (bytes)630,132,48063,169,920
Size600.9 MB 60.2 MB
Events in quadrant A2,578,730418,617
Events in quadrant B6,979,490341,327
Events in quadrant C3,267,751408,526
Events in quadrant D5,888,139360,706

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0113143
B0244032
C0131192
D0212982

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5463100.183050%
B5463141825.956434%
C54631322.416255%
D546382215.046678%

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 7167 5464 2 2 0.03% 0.04%
B 7167 5464 1167 1167 16.28% 21.36%
C 7167 5464 81 81 1.13% 1.48%
D 7167 5464 743 743 10.37% 13.60%

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 10 83 125516 994.73 627 614 125.6
A 7 32 13614 103.53 627 614 125.6
A 13 254 10021 74.92 627 614 125.6
B 4 251 2717938 25070.27 561 545 108.4
B 5 236 1556074 14351.08 561 545 108.4
B 5 31 110368 1013.21 561 545 108.4
C 0 10 314726 2214.67 611 616 141.8
C 0 207 250542 1762.13 611 616 141.8
C 15 214 223090 1568.58 611 616 141.8
D 7 80 2838941 20206.87 574 558 140.5
D 10 203 404381 2874.88 574 558 140.5
D 1 47 94833 671.16 574 558 140.5

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