ASTROSAT CZTI

Data Quality Report

Orbit 54227

Creation date: 2025-10-06T20:32:53.255468
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/AS1C09_004T08_9000006514_54227cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54227cztM0_level2_quad_clean.evt
Size (bytes)747,074,88078,428,160
Size712.5 MB 74.8 MB
Events in quadrant A5,140,091569,948
Events in quadrant B3,902,521677,408
Events in quadrant C3,415,403587,432
Events in quadrant D14,692,29387,357

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198472
B0160401
C0149271
D0480841

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A647981912.640840%
B64792023.117765%
C64801342.067901%
D6480559886.388889%

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 7449 6480 616 616 8.27% 9.51%
B 7449 6480 71 71 0.95% 1.10%
C 7450 6481 60 60 0.81% 0.93%
D 7449 6480 4561 4561 61.23% 70.39%

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 17 1845298 11335.65 655 640 162.7
A 12 194 237316 1454.4 655 640 162.7
A 15 174 161761 990.11 655 640 162.7
B 5 236 451631 3101.97 678 654 145.4
B 4 171 295460 2027.77 678 654 145.4
B 8 234 164015 1123.65 678 654 145.4
C 15 215 203450 1109.03 665 656 182.9
C 13 3 102310 555.92 665 656 182.9
C 12 252 96284 522.96 665 656 182.9
D 8 176 13311891 179380.03 254 241 74.2
D 2 62 54407 729.91 254 241 74.2
D 2 153 40106 537.2 254 241 74.2

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