ASTROSAT CZTI

Data Quality Report

Orbit 52255

Creation date: 2025-07-21T16:58:09.686256
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_011T08_9000006472_52255cztM0_level2.fits modeM0/AS1C09_011T08_9000006472_52255cztM0_level2_quad_clean.evt
Size (bytes)953,979,84098,326,080
Size909.8 MB 93.8 MB
Events in quadrant A4,067,292734,263
Events in quadrant B10,593,095626,323
Events in quadrant C8,493,902607,005
Events in quadrant D11,550,074460,945

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177471
B0369610
C0307350
D0397080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7883590.748446%
B7884207126.268392%
C7884144018.264840%
D7884274434.804668%

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 7883 7883 36 36 0.46% 0.46%
B 7884 7884 1481 1481 18.78% 18.78%
C 7884 7884 1119 1119 14.19% 14.19%
D 7884 7884 2272 2272 28.82% 28.82%

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 3 79 229867 1097.8 829 808 208.7
A 4 3 141354 673.59 829 808 208.7
A 11 3 106096 504.61 829 808 208.7
B 10 254 3102801 19396.81 749 723 159.9
B 12 32 2048848 12806.6 749 723 159.9
B 5 32 552010 3447.11 749 723 159.9
C 15 224 4294304 20866.31 751 745 205.8
C 9 38 190494 922.16 751 745 205.8
C 1 242 144394 698.12 751 745 205.8
D 11 176 6423673 33517.63 671 641 191.6
D 8 176 688062 3587.2 671 641 191.6
D 6 42 604808 3152.76 671 641 191.6

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