ASTROSAT CZTI

Data Quality Report

Orbit 20475

Creation date: 2024-06-27T18:15:49.269839
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/AS1A05_208T03_9000003026_20475cztM0_level2.evt modeM0/AS1A05_208T03_9000003026_20475cztM0_level2_quad_clean.evt
Size (bytes)985,907,520178,505,280
Size940.2 MB 170.2 MB
Events in quadrant A7,445,4521,129,853
Events in quadrant B7,460,8321,149,173
Events in quadrant C6,454,6831,110,595
Events in quadrant D7,580,9581,081,209

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0311873
B0306543
C0277824
D0313933

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02760
B02760
C02760
D02760

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A135456234.599483%
B135453162.332964%
C135452361.742340%
D135453322.451089%

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 15185 13545 69 69 0.45% 0.51%
B 15185 13545 72 72 0.47% 0.53%
C 15185 13545 1 1 0.01% 0.01%
D 15185 13545 131 131 0.86% 0.97%

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 14 111 1160218 3552.01 1614 1574 326.2
A 9 143 55165 164.29 1614 1574 326.2
A 13 254 14827 40.63 1614 1574 326.2
B 0 189 412924 1342.42 1619 1577 306.4
B 0 197 280869 911.47 1619 1577 306.4
B 4 216 87025 278.86 1619 1577 306.4
C 14 238 241356 656.01 1564 1571 365.5
C 3 9 87948 236.31 1564 1571 365.5
C 3 233 21329 54.05 1564 1571 365.5
D 1 52 432734 1111.25 1587 1537 388.0
D 7 38 223377 571.71 1587 1537 388.0
D 9 1 150734 384.5 1587 1537 388.0

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