ASTROSAT CZTI

Data Quality Report

Orbit 37940

Creation date: 2024-06-27T21:46:24.538933
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/AS1A11_082T01_9000005356_37940cztM0_level2.evt modeM0/AS1A11_082T01_9000005356_37940cztM0_level2_quad_clean.evt
Size (bytes)408,398,40053,648,640
Size389.5 MB 51.2 MB
Events in quadrant A2,817,565327,456
Events in quadrant B2,792,214332,586
Events in quadrant C2,776,404331,797
Events in quadrant D3,641,055280,563

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0112413
B0111742
C0111402
D0139892

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A502170.139414%
B5021711.414061%
C5021240.477992%
D50213015.994822%

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 7083 5022 5 5 0.07% 0.10%
B 7083 5022 44 44 0.62% 0.88%
C 7083 5022 18 18 0.25% 0.36%
D 7083 5022 260 260 3.67% 5.18%

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 10 83 343371 2742.29 626 618 125.0
A 12 189 17727 136.89 626 618 125.0
A 15 222 12954 98.7 626 618 125.0
B 5 172 252700 2173.09 620 605 116.0
B 0 230 51895 442.13 620 605 116.0
B 4 80 28481 240.29 620 605 116.0
C 15 214 215683 1534.53 615 620 140.1
C 0 10 111569 791.65 615 620 140.1
C 14 254 28581 199.51 615 620 140.1
D 2 249 865050 5860.9 604 588 147.5
D 1 52 279614 1891.75 604 588 147.5
D 13 249 59325 398.23 604 588 147.5

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