ASTROSAT CZTI

Data Quality Report

Orbit 54550

Creation date: 2025-10-28T15:18:07.614426
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_127T09_9000006520_54550cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54550cztM0_level2_quad_clean.evt
Size (bytes)697,772,160112,187,520
Size665.4 MB 107.0 MB
Events in quadrant A4,326,260778,519
Events in quadrant B4,967,260833,364
Events in quadrant C10,784,394512,938
Events in quadrant D5,103,315692,029

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190150
B0207250
C0379710
D0211680

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83501591.904192%
B83512142.562567%
C8351277533.229553%
D83512112.526644%

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 8350 8350 151 151 1.81% 1.81%
B 8351 8351 120 120 1.44% 1.44%
C 8351 8351 2614 2614 31.30% 31.30%
D 8351 8351 210 210 2.51% 2.51%

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 11 3 363650 1612.76 906 880 224.9
A 4 249 194423 860.43 906 880 224.9
A 3 110 116005 511.81 906 880 224.9
B 8 234 653993 3358.81 899 867 194.5
B 10 14 280397 1437.53 899 867 194.5
B 0 213 152607 780.35 899 867 194.5
C 12 254 3799190 19226.46 719 714 197.6
C 4 5 2265722 11464.62 719 714 197.6
C 12 252 960541 4858.28 719 714 197.6
D 6 239 760445 3093.16 869 829 245.6
D 3 12 468355 1903.77 869 829 245.6
D 8 160 219942 892.23 869 829 245.6

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