ASTROSAT CZTI

Data Quality Report

Orbit 26891

Creation date: 2024-06-27T19:34:07.803007
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_038T12_9000003880_26891cztM0_level2.evt modeM0/AS1A09_038T12_9000003880_26891cztM0_level2_quad_clean.evt
Size (bytes)424,990,08070,902,720
Size405.3 MB 67.6 MB
Events in quadrant A3,329,905476,318
Events in quadrant B4,385,445440,089
Events in quadrant C1,902,356479,424
Events in quadrant D2,972,170459,308

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127571
B0157941
C084091
D0117281

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0820
B0820
C0820
D0820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A41372044.931109%
B413788521.392313%
C4137170.410926%
D41371694.085086%

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 4137 4137 131 131 3.17% 3.17%
B 4137 4137 773 773 18.69% 18.69%
C 4137 4137 3 3 0.07% 0.07%
D 4137 4137 169 169 4.09% 4.09%

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 0 13 983539 10348.1 468 460 95.0
A 6 16 537665 5654.73 468 460 95.0
A 13 254 6764 66.36 468 460 95.0
B 3 64 2561713 30856.9 437 425 83.0
B 0 190 59960 717.24 437 425 83.0
B 10 246 35582 423.55 437 425 83.0
C 14 238 75321 689.93 463 465 108.5
C 15 208 21550 194.34 463 465 108.5
C 13 61 3059 23.91 463 465 108.5
D 1 52 975324 9140.31 452 442 106.7
D 2 250 169548 1585.51 452 442 106.7
D 11 176 58437 543.75 452 442 106.7

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