ASTROSAT CZTI

Data Quality Report

Orbit 50956

Creation date: 2025-03-01T11:00:45.246910
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/AS1C07_001T02_9000006452_50956cztM0_level2.fits modeM0/AS1C07_001T02_9000006452_50956cztM0_level2_quad_clean.evt
Size (bytes)622,874,88092,358,720
Size594.0 MB 88.1 MB
Events in quadrant A4,223,624637,806
Events in quadrant B3,126,961702,934
Events in quadrant C5,414,142587,941
Events in quadrant D9,781,893409,435

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170612
B0140152
C0205722
D0336672

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65763495.307178%
B65761111.687956%
C65765328.090024%
D6576224934.200122%

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 7621 6577 208 208 2.73% 3.16%
B 7621 6577 9 9 0.12% 0.14%
C 7621 6576 417 417 5.47% 6.34%
D 7621 6577 1869 1869 24.52% 28.42%

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 4 249 335822 1912.58 701 683 175.2
A 14 254 268043 1525.77 701 683 175.2
A 8 43 139954 794.79 701 683 175.2
B 4 81 42521 283.78 701 678 147.4
B 8 128 42316 282.39 701 678 147.4
B 0 245 42129 281.12 701 678 147.4
C 4 5 595650 3206.37 660 656 185.6
C 0 193 525788 2829.89 660 656 185.6
C 0 177 339787 1827.55 660 656 185.6
D 8 176 3327935 20828.83 557 537 159.7
D 15 125 2891836 18098.94 557 537 159.7
D 2 62 437493 2735.25 557 537 159.7

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