ASTROSAT CZTI

Data Quality Report

Orbit 20220221_A11_046T09_9000004952_level2

Creation date: 2022-02-23T16:44:24.846387
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_046T09_9000004952cztM0_level2_bc.evt modeM0/AS1A11_046T09_9000004952cztM0_level2_quad_clean.evt
Size (bytes)1,265,633,280339,433,920
Size1.2 GB 323.7 MB
Events in quadrant A5,573,9692,214,641
Events in quadrant B8,022,7952,172,120
Events in quadrant C6,890,0222,188,602
Events in quadrant D16,176,1762,022,620

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05000
B05000
C05000
D05000

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0508150
B0611560
C0528540
D0858030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A244621050.429237%
B2446211294.615322%
C244622090.854386%
D2446218427.530047%

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 35609 24466 12 12 0.03% 0.05%
B 35609 24461 157 157 0.44% 0.64%
C 35609 24464 18 18 0.05% 0.07%
D 35609 24462 651 651 1.83% 2.66%

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 15 169 178023 602.88 1334 1316 293.1
A 10 83 144372 488.07 1334 1316 293.1
A 13 254 43486 143.87 1334 1316 293.1
B 5 172 2209404 8605.65 1314 1289 256.6
B 5 200 271366 1052.57 1314 1289 256.6
B 4 232 118441 456.57 1314 1289 256.6
C 15 214 963043 3255.29 1287 1279 295.4
C 0 10 336422 1134.36 1287 1279 295.4
C 14 67 312126 1052.13 1287 1279 295.4
D 8 195 5955455 19546.98 1267 1234 304.6
D 7 223 1962539 6438.72 1267 1234 304.6
D 2 249 1100407 3608.45 1267 1234 304.6

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