ASTROSAT CZTI

Data Quality Report

Orbit 51801

Creation date: 2025-04-26T12:48:19.006746
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_51801cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51801cztM0_level2_quad_clean.evt
Size (bytes)710,861,76089,913,600
Size677.9 MB 85.7 MB
Events in quadrant A5,744,192610,359
Events in quadrant B6,704,497589,404
Events in quadrant C5,085,655596,928
Events in quadrant D8,278,437473,228

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215422
B0243962
C0196252
D0291052

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64823415.260722%
B6483120618.602499%
C64832644.072189%
D6483145322.412463%

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 7582 6482 252 252 3.32% 3.89%
B 7583 6483 949 949 12.51% 14.64%
C 7583 6483 112 112 1.48% 1.73%
D 7583 6483 1441 1441 19.00% 22.23%

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 12 3 1169519 6801.28 705 688 171.9
A 4 175 508895 2957.19 705 688 171.9
A 15 174 248231 1440.42 705 688 171.9
B 10 128 2300924 16277.0 655 630 141.3
B 12 32 907969 6420.38 655 630 141.3
B 10 44 187448 1321.93 655 630 141.3
C 10 22 1108453 5826.53 697 690 190.1
C 5 250 518201 2721.97 697 690 190.1
C 13 3 178792 936.77 697 690 190.1
D 11 129 4317625 24413.51 636 614 176.8
D 8 176 481296 2718.35 636 614 176.8
D 12 6 210652 1187.8 636 614 176.8

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