ASTROSAT CZTI

Data Quality Report

Orbit 20180401_G08_047T01_9000002002_level2

Creation date: 2025-11-20T12:45:24.344927
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/AS1G08_047T01_9000002002cztM0_level2.fits modeM0/AS1G08_047T01_9000002002cztM0_level2_quad_clean.evt
Size (bytes)746,706,240726,618,240
Size712.1 MB 693.0 MB
Events in quadrant A4,581,5104,391,517
Events in quadrant B4,384,4684,304,135
Events in quadrant C4,485,9184,206,636
Events in quadrant D3,884,9563,826,577

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015680
B015680
C015680
D015680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01596890
B01743890
C01628680
D01836950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A769597050.916072%
B7695920552.670253%
C769595770.749750%
D7695918612.418171%

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 88683 76947 0 0 0.00% 0.00%
B 88683 76915 0 0 0.00% 0.00%
C 88683 76945 0 0 0.00% 0.00%
D 88683 76918 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 4231 10.56 1192 1117 295.0
A 7 110 3650 8.59 1192 1117 295.0
A 9 19 3492 8.05 1192 1117 295.0
B 2 9 3645 11.23 1155 1103 226.4
B 3 17 2865 7.78 1155 1103 226.4
B 14 254 2820 7.58 1155 1103 226.4
C 1 80 3376 7.42 1185 1105 306.0
C 12 241 3319 7.24 1185 1105 306.0
C 1 81 3286 7.13 1185 1105 306.0
D 3 14 2964 6.61 1110 1011 295.5
D 6 231 2910 6.43 1110 1011 295.5
D 3 31 2707 5.74 1110 1011 295.5

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