ASTROSAT CZTI

Data Quality Report

Orbit 20180212_A04_048T01_9000001890_level2

Creation date: 2025-11-19T11:58:57.764067
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/AS1A04_048T01_9000001890cztM0_level2.fits modeM0/AS1A04_048T01_9000001890cztM0_level2_quad_clean.evt
Size (bytes)599,713,920533,678,400
Size571.9 MB 509.0 MB
Events in quadrant A3,711,3283,174,112
Events in quadrant B3,315,7582,868,751
Events in quadrant C3,679,8703,054,304
Events in quadrant D3,140,7782,753,649

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0880
B0880
C0880
D0880

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012780
B012780
C012780
D012780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01333410
B01894540
C01291000
D01524530

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A628547341.167786%
B62854764012.155153%
C628543680.585484%
D6285425454.049066%

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 71634 62816 0 0 0.00% 0.00%
B 71634 62201 0 0 0.00% 0.00%
C 71634 62852 0 0 0.00% 0.00%
D 71634 62832 0 0 0.00% 0.00%

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 0 29 3603 11.1 967 904 243.1
A 7 110 2958 8.45 967 904 243.1
A 9 19 2761 7.64 967 904 243.1
B 2 9 2947 12.31 873 834 171.7
B 3 17 2203 7.97 873 834 171.7
B 2 8 2202 7.97 873 834 171.7
C 1 80 2811 7.65 969 904 249.4
C 1 81 2773 7.49 969 904 249.4
C 12 241 2488 6.35 969 904 249.4
D 3 14 2298 6.26 895 817 236.7
D 6 231 2279 6.18 895 817 236.7
D 10 189 2167 5.7 895 817 236.7

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