ASTROSAT CZTI

Data Quality Report

Orbit 58620

Creation date: 2026-07-29T11:51:19.497826
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_004T06_9000006594_58620cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58620cztM0_level2_quad_clean.evt
Size (bytes)572,057,280106,185,600
Size545.6 MB 101.3 MB
Events in quadrant A3,649,126698,998
Events in quadrant B4,459,010738,978
Events in quadrant C7,896,253620,943
Events in quadrant D4,591,754635,959

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0162370
B0184450
C0286380
D0189240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7473420.562023%
B74732533.385521%
C747288411.830835%
D74721742.328694%

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 7473 7473 9 9 0.12% 0.12%
B 7473 7473 81 81 1.08% 1.08%
C 7472 7472 791 791 10.59% 10.59%
D 7472 7472 126 126 1.69% 1.69%

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 10 17 259155 1296.42 814 793 199.3
A 10 251 116647 581.34 814 793 199.3
A 12 114 69969 347.11 814 793 199.3
B 6 255 289961 1680.1 804 775 172.1
B 4 171 205645 1190.24 804 775 172.1
B 8 128 185405 1072.65 804 775 172.1
C 15 217 3224198 15407.63 768 762 209.2
C 13 3 709278 3386.62 768 762 209.2
C 15 164 487925 2328.58 768 762 209.2
D 8 240 384432 1742.9 786 753 220.1
D 3 12 315808 1431.17 786 753 220.1
D 2 249 270331 1224.58 786 753 220.1

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