ASTROSAT CZTI

Data Quality Report

Orbit 34577

Creation date: 2022-02-19T11:23:49.614596
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_167T01_9000004940_34577cztM0_level2.evt modeM0/AS1A05_167T01_9000004940_34577cztM0_level2_quad_clean.evt
Size (bytes)2,120,630,400336,268,800
Size2.0 GB 320.7 MB
Events in quadrant A11,582,6522,160,299
Events in quadrant B15,036,0922,154,832
Events in quadrant C12,083,2752,185,696
Events in quadrant D23,904,7662,031,055

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04920
B04920
C04920
D04920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0870
B0870
C0870
D0870

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0505067
B0605416
C0502796
D0882556

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A240322581.073569%
B2403210014.165280%
C24032740.307923%
D2403214415.996172%

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 35581 24038 140 140 0.39% 0.58%
B 35581 24038 669 669 1.88% 2.78%
C 35581 24038 43 43 0.12% 0.18%
D 35581 24038 900 900 2.53% 3.74%

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 15 223 490834 882.56 2792 2746 553.0
A 10 83 139943 248.08 2792 2746 553.0
A 9 143 69969 121.55 2792 2746 553.0
B 5 172 3034999 5817.36 2751 2683 521.3
B 0 229 492947 940.55 2751 2683 521.3
B 0 190 157375 296.77 2751 2683 521.3
C 15 214 1003591 1594.57 2724 2746 627.7
C 0 10 223287 351.37 2724 2746 627.7
C 14 67 116452 181.16 2724 2746 627.7
D 8 195 10728623 16349.4 2676 2601 656.0
D 1 47 650690 987.87 2676 2601 656.0
D 13 249 503426 763.39 2676 2601 656.0

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