ASTROSAT CZTI

Data Quality Report

Orbit 26976

Creation date: 2024-06-27T19:35:10.186447
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/AS1A09_145T01_9000003900_26976cztM0_level2.evt modeM0/AS1A09_145T01_9000003900_26976cztM0_level2_quad_clean.evt
Size (bytes)681,629,76075,260,160
Size650.1 MB 71.8 MB
Events in quadrant A8,526,634362,816
Events in quadrant B3,444,669500,166
Events in quadrant C3,512,019479,758
Events in quadrant D4,704,798466,925

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0299300
B0142530
C0144580
D0184540

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6720235435.029762%
B6720691.026786%
C67211321.963993%
D67212814.180925%

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 8515 6720 1762 1762 20.69% 26.22%
B 8515 6720 1 1 0.01% 0.01%
C 8516 6721 13 13 0.15% 0.19%
D 8516 6721 189 189 2.22% 2.81%

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 14 235 5672576 38342.22 731 717 147.9
A 8 192 27904 183.79 731 717 147.9
A 13 254 10117 63.54 731 717 147.9
B 12 111 19872 113.25 875 855 167.9
B 0 219 19552 111.34 875 855 167.9
B 11 111 17677 100.17 875 855 167.9
C 14 238 134905 675.16 844 850 198.6
C 15 208 55996 277.74 844 850 198.6
C 2 16 18715 89.98 844 850 198.6
D 1 52 807897 3985.81 842 821 202.5
D 2 250 311244 1533.05 842 821 202.5
D 7 38 179876 884.28 842 821 202.5

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