ASTROSAT CZTI

Data Quality Report

Orbit 00851

Creation date: 2024-06-27T14:03:48.488382
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_156T01_9000000118_00851cztM0_level2.evt modeM0/AS1P01_156T01_9000000118_00851cztM0_level2_quad_clean.evt
Size (bytes)1,063,031,04068,351,040
Size1013.8 MB 65.2 MB
Events in quadrant A8,030,655409,564
Events in quadrant B8,585,356408,388
Events in quadrant C7,818,448408,365
Events in quadrant D7,334,373395,232

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0284350
B0300400
C0277510
D0263690

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6422320.498287%
B6422410.638430%
C6421260.404921%
D6421190.295904%

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 7567 6423 309 309 4.08% 4.81%
B 7567 6423 471 471 6.22% 7.33%
C 7566 6422 213 213 2.82% 3.32%
D 7566 6421 181 181 2.39% 2.82%

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 15 171 56145 108.7 2062 2083 497.4
A 0 231 45361 87.01 2062 2083 497.4
A 15 233 12599 21.14 2062 2083 497.4
B 5 191 253323 500.92 2149 2163 501.4
B 2 2 55979 107.33 2149 2163 501.4
B 0 23 35621 66.73 2149 2163 501.4
C 10 19 24670 41.34 1977 2053 547.1
C 3 111 23967 40.06 1977 2053 547.1
C 15 241 23359 38.95 1977 2053 547.1
D 1 4 76189 126.15 1922 1995 588.2
D 5 254 12531 17.91 1922 1995 588.2
D 13 72 10762 14.91 1922 1995 588.2

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