ASTROSAT CZTI

Data Quality Report

Orbit 20200919_A09_134T01_9000003896_level2

Creation date: 2021-01-08T06:01:45.227776
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_134T01_9000003896cztM0_level2_bc.evt modeM0/AS1A09_134T01_9000003896cztM0_level2_quad_clean.evt
Size (bytes)688,498,56096,099,840
Size656.6 MB 91.6 MB
Events in quadrant A2,878,662646,032
Events in quadrant B12,442,953471,858
Events in quadrant C1,642,696648,362
Events in quadrant D3,352,495602,538

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0202200
B0492550
C0161850
D0219590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77645046.491499%
B7765525967.726980%
C77652052.640052%
D77654916.323245%

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 8099 7763 181 181 2.23% 2.33%
B 8100 7764 2356 2356 29.09% 30.35%
C 8100 7764 0 0 0.00% 0.00%
D 8100 7764 100 100 1.23% 1.29%

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 6 16 973457 10760.22 403 394 90.4
A 14 235 312151 3447.44 403 394 90.4
A 0 13 26030 283.49 403 394 90.4
B 0 189 11119172 167159.87 332 324 66.5
B 0 219 18357 271.11 332 324 66.5
B 0 244 7526 108.27 332 324 66.5
C 0 207 55801 569.47 402 401 97.3
C 2 16 19047 191.67 402 401 97.3
C 15 208 11755 116.71 402 401 97.3
D 1 52 1444099 15672.48 395 381 92.1
D 2 250 215113 2331.05 395 381 92.1
D 12 1 67133 724.64 395 381 92.1

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