ASTROSAT CZTI

Data Quality Report

Orbit 56491

Creation date: 2026-03-08T06:29:39.590426
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_060T01_9000006556_56491cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56491cztM0_level2_quad_clean.evt
Size (bytes)417,389,76096,033,600
Size398.1 MB 91.6 MB
Events in quadrant A4,019,000622,531
Events in quadrant B3,387,535682,150
Events in quadrant C3,827,175593,429
Events in quadrant D3,718,088562,090

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164302
B0144512
C0160232
D0153982

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64101542.402496%
B64101271.981279%
C64102403.744150%
D6410841.310452%

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 7550 6411 126 126 1.67% 1.97%
B 7550 6411 54 54 0.72% 0.84%
C 7550 6410 204 204 2.70% 3.18%
D 7550 6411 75 75 0.99% 1.17%

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 4 95 845657 4861.16 699 683 173.8
A 7 64 128098 733.02 699 683 173.8
A 4 206 83433 476.06 699 683 173.8
B 4 206 136513 917.88 700 678 148.0
B 4 171 125022 840.23 700 678 148.0
B 0 63 101384 680.5 700 678 148.0
C 15 230 408370 2200.86 670 666 185.2
C 13 3 288494 1553.75 670 666 185.2
C 6 223 179998 968.07 670 666 185.2
D 3 12 268919 1390.53 673 642 192.9
D 2 249 139139 717.86 673 642 192.9
D 9 49 115632 596.01 673 642 192.9

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