ASTROSAT CZTI

Data Quality Report

Orbit 56842

Creation date: 2026-03-31T19:44:46.560767
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_083T03_9000006562_56842cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56842cztM0_level2_quad_clean.evt
Size (bytes)404,392,32095,647,680
Size385.7 MB 91.2 MB
Events in quadrant A3,009,211632,859
Events in quadrant B3,324,051675,432
Events in quadrant C3,718,338594,304
Events in quadrant D4,417,965545,906

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0136921
B0142961
C0156581
D0176031

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6419771.199564%
B64191412.196604%
C64202063.208723%
D64204176.495327%

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 7499 6420 11 11 0.15% 0.17%
B 7499 6420 54 54 0.72% 0.84%
C 7500 6421 144 144 1.92% 2.24%
D 7500 6421 356 356 4.75% 5.54%

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 80354 455.2 708 690 175.0
A 3 62 59708 337.23 708 690 175.0
A 3 14 54655 308.36 708 690 175.0
B 5 185 179305 1210.41 684 658 147.6
B 10 16 149834 1010.73 684 658 147.6
B 0 245 63746 427.45 684 658 147.6
C 12 252 856471 4637.62 668 659 184.5
C 13 3 102967 554.4 668 659 184.5
C 1 16 99636 536.35 668 659 184.5
D 2 249 854252 4512.64 668 635 189.2
D 8 240 753301 3978.97 668 635 189.2
D 2 31 65850 344.76 668 635 189.2

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