ASTROSAT CZTI

Data Quality Report

Orbit 55579

Creation date: 2026-01-05T20:17:54.145867
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_021T06_9000006538_55579cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55579cztM0_level2_quad_clean.evt
Size (bytes)429,958,08097,344,000
Size410.0 MB 92.8 MB
Events in quadrant A4,756,002623,359
Events in quadrant B3,073,106684,361
Events in quadrant C3,527,932604,051
Events in quadrant D4,036,508567,937

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189441
B0140761
C0156211
D0168871

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67113475.170615%
B6711841.251676%
C67121171.743147%
D67122173.233015%

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 7526 6712 210 210 2.79% 3.13%
B 7526 6712 1 1 0.01% 0.01%
C 7527 6713 49 49 0.65% 0.73%
D 7527 6713 138 138 1.83% 2.06%

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 15 32 1314372 7578.7 693 677 173.3
A 0 8 415991 2395.95 693 677 173.3
A 12 115 252796 1454.47 693 677 173.3
B 7 0 120055 813.85 685 661 146.7
B 10 247 73697 497.85 685 661 146.7
B 4 169 72957 492.81 685 661 146.7
C 9 38 383607 2068.85 672 665 185.1
C 12 252 192183 1034.68 672 665 185.1
C 6 223 51027 272.08 672 665 185.1
D 15 125 370035 1934.62 676 645 190.9
D 11 129 355214 1856.99 676 645 190.9
D 3 12 145873 760.61 676 645 190.9

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