ASTROSAT CZTI

Data Quality Report

Orbit 55905

Creation date: 2026-01-30T18:23:06.931843
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_030T02_9000006544_55905cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55905cztM0_level2_quad_clean.evt
Size (bytes)1,280,194,560266,451,840
Size1.2 GB 254.1 MB
Events in quadrant A10,000,3051,719,875
Events in quadrant B9,120,2111,871,833
Events in quadrant C11,980,2291,637,310
Events in quadrant D14,781,8761,498,897

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03920
B03920
C03920
D03920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0445292
B0417862
C0501562
D0575952

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A194435883.024225%
B194435632.895644%
C194439795.035231%
D1944415347.889323%

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 20288 19443 244 244 1.20% 1.25%
B 20288 19444 139 139 0.69% 0.71%
C 20288 19445 645 645 3.18% 3.32%
D 20289 19446 1144 1144 5.64% 5.88%

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 0 8 669094 1333.11 2043 1989 500.4
A 4 249 580210 1155.49 2043 1989 500.4
A 12 115 496662 988.53 2043 1989 500.4
B 5 185 476681 1100.01 2016 1938 431.6
B 7 252 154415 353.3 2016 1938 431.6
B 7 0 109631 249.53 2016 1938 431.6
C 12 252 2085131 3885.0 1960 1941 536.2
C 15 199 1085699 2021.13 1960 1941 536.2
C 13 3 916993 1706.51 1960 1941 536.2
D 11 129 4286859 7853.02 1949 1858 545.6
D 8 240 605811 1106.85 1949 1858 545.6
D 3 12 573363 1047.38 1949 1858 545.6

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