ASTROSAT CZTI

Data Quality Report

Orbit 51766

Creation date: 2025-04-24T05:09:40.350654
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_51766cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51766cztM0_level2_quad_clean.evt
Size (bytes)752,696,64083,704,320
Size717.8 MB 79.8 MB
Events in quadrant A4,812,462592,518
Events in quadrant B6,393,702577,640
Events in quadrant C8,073,486455,200
Events in quadrant D8,070,939448,003

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189121
B0236671
C0284101
D0286031

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66123825.777374%
B6612116417.604356%
C6613183327.718131%
D6612152423.049002%

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 7456 6607 258 258 3.46% 3.90%
B 7456 6607 701 701 9.40% 10.61%
C 7457 6606 1430 1430 19.18% 21.65%
D 7456 6607 1341 1341 17.99% 20.30%

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 2 143 1013358 5970.33 685 669 169.6
A 8 249 244493 1437.47 685 669 169.6
A 3 79 100411 588.03 685 669 169.6
B 4 206 3369390 23645.04 650 625 142.5
B 6 51 65366 454.41 650 625 142.5
B 4 174 63381 440.47 650 625 142.5
C 15 230 3337686 20161.1 596 593 165.5
C 15 218 1670070 10086.17 596 593 165.5
C 9 38 219193 1320.68 596 593 165.5
D 11 129 5027349 29587.62 602 581 169.9
D 8 176 278348 1634.94 602 581 169.9
D 3 12 156681 918.81 602 581 169.9

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