ASTROSAT CZTI

Data Quality Report

Orbit 56675

Creation date: 2026-03-20T19:50:18.542250
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_083T06_9000006558_56675cztM0_level2.fits modeM0/AS1A14_083T06_9000006558_56675cztM0_level2_quad_clean.evt
Size (bytes)1,366,968,960262,961,280
Size1.3 GB 250.8 MB
Events in quadrant A11,909,2471,708,052
Events in quadrant B8,945,2701,908,428
Events in quadrant C13,325,8691,606,024
Events in quadrant D14,915,3371,399,393

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0492414
B0408684
C0532554
D0578564

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1943912036.188590%
B194395032.587582%
C1944012096.219136%
D1944018259.387860%

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 20309 19443 791 791 3.89% 4.07%
B 20309 19443 39 39 0.19% 0.20%
C 20310 19444 782 782 3.85% 4.02%
D 20310 19443 1662 1662 8.18% 8.55%

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 8 26 2952706 5863.06 2057 2003 503.3
A 12 3 262541 517.69 2057 2003 503.3
A 0 8 193157 379.82 2057 2003 503.3
B 4 21 202623 453.73 2076 1992 442.2
B 0 245 138650 309.06 2076 1992 442.2
B 8 128 101822 225.77 2076 1992 442.2
C 12 252 2029594 3745.56 2008 1986 541.3
C 9 38 1233342 2274.66 2008 1986 541.3
C 15 148 635629 1170.52 2008 1986 541.3
D 2 249 3868898 7061.17 1967 1878 547.6
D 8 240 1530228 2790.77 1967 1878 547.6
D 7 96 539066 980.9 1967 1878 547.6

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