ASTROSAT CZTI

Data Quality Report

Orbit 55687

Creation date: 2026-01-13T12:40:14.467458
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_099T04_9000006540_55687cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55687cztM0_level2_quad_clean.evt
Size (bytes)1,421,856,000250,116,480
Size1.3 GB 238.5 MB
Events in quadrant A16,568,7241,463,300
Events in quadrant B8,093,6171,809,994
Events in quadrant C9,334,4901,620,414
Events in quadrant D17,187,9441,387,801

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0625014
B0387154
C0419594
D0642614

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03820
B03820
C03820
D03820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18721237012.659580%
B187221470.785173%
C187221760.940071%
D18721191510.229154%

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 19971 18726 2365 2365 11.84% 12.63%
B 19972 18727 25 25 0.13% 0.13%
C 19971 18726 84 84 0.42% 0.45%
D 19971 18726 1678 1678 8.40% 8.96%

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 12 115 6010499 13275.33 1839 1790 452.6
A 7 64 2647435 5845.15 1839 1790 452.6
A 15 32 269246 590.9 1839 1790 452.6
B 5 172 164680 399.51 1902 1828 407.6
B 4 206 152875 370.55 1902 1828 407.6
B 10 247 90316 217.08 1902 1828 407.6
C 9 38 1101996 2135.15 1888 1868 515.2
C 13 3 351609 678.78 1888 1868 515.2
C 12 252 164031 314.73 1888 1868 515.2
D 11 129 8022171 15651.81 1810 1727 512.4
D 10 181 641579 1248.66 1810 1727 512.4
D 8 245 599819 1167.17 1810 1727 512.4

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