ASTROSAT CZTI

Data Quality Report

Orbit 54842

Creation date: 2025-12-18T19:47:09.378912
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/AS1A14_014T01_9000006528_54842cztM0_level2.fits modeM0/AS1A14_014T01_9000006528_54842cztM0_level2_quad_clean.evt
Size (bytes)1,828,382,400192,366,720
Size1.7 GB 183.5 MB
Events in quadrant A10,779,1411,356,980
Events in quadrant B9,238,5171,582,692
Events in quadrant C8,132,9781,471,163
Events in quadrant D38,255,675277,915

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0456331500
B039955595
C037151775
D01285853677

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03424
B03417
C03448
D03435

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1645515319.304163%
B165139525.765155%
C165073512.126371%
D163521341782.051125%

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 19258 16538 927 927 4.81% 5.61%
B 19258 16608 576 576 2.99% 3.47%
C 19258 16600 90 90 0.47% 0.54%
D 19257 16381 13015 13015 67.59% 79.45%

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 32 3103526 7324.9 1728 1685 423.5
A 0 8 803807 1894.19 1728 1685 423.5
A 4 3 54449 124.6 1728 1685 423.5
B 4 81 1383105 3729.56 1733 1667 370.4
B 0 183 278646 747.78 1733 1667 370.4
B 5 236 158189 422.57 1733 1667 370.4
C 4 5 260705 534.46 1782 1767 484.5
C 6 223 213525 437.08 1782 1767 484.5
C 13 3 150884 307.78 1782 1767 484.5
D 15 94 33604946 150174.53 779 743 223.8
D 2 249 509169 2272.12 779 743 223.8
D 11 129 208833 929.94 779 743 223.8

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