ASTROSAT CZTI

Data Quality Report

Orbit 00894

Creation date: 2024-06-27T14:04:23.378674
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/AS1P01_161T03_9000000178_00894cztM0_level2.evt modeM0/AS1P01_161T03_9000000178_00894cztM0_level2_quad_clean.evt
Size (bytes)1,129,852,80072,982,080
Size1.1 GB 69.6 MB
Events in quadrant A7,005,028485,320
Events in quadrant B9,785,888446,943
Events in quadrant C10,363,257401,386
Events in quadrant D6,668,735458,285

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250700
B0333440
C0352380
D0240760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5969260.435584%
B596963110.571285%
C5969135822.750880%
D5969200.335064%

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 7059 5970 150 150 2.12% 2.51%
B 7059 5970 1355 1355 19.20% 22.70%
C 7059 5970 1812 1812 25.67% 30.35%
D 7059 5970 99 99 1.40% 1.66%

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 14 170 12775 24.82 1821 1838 440.6
A 11 79 6321 10.17 1821 1838 440.6
A 3 111 5516 8.35 1821 1838 440.6
B 3 0 2560812 6041.01 1800 1812 423.6
B 8 38 176998 413.56 1800 1812 423.6
B 7 221 62891 144.19 1800 1812 423.6
C 9 83 4216322 9701.72 1554 1605 434.4
C 15 241 26532 57.38 1554 1605 434.4
C 3 111 22198 47.4 1554 1605 434.4
D 1 4 259186 504.41 1684 1740 510.4
D 2 16 27155 49.79 1684 1740 510.4
D 10 125 22552 40.78 1684 1740 510.4

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