ASTROSAT CZTI

Data Quality Report

Orbit 51468

Creation date: 2025-04-04T02:36:39.866221
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/AS1A13_090T01_9000006458_51468cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51468cztM0_level2_quad_clean.evt
Size (bytes)656,879,04089,637,120
Size626.4 MB 85.5 MB
Events in quadrant A5,685,753613,374
Events in quadrant B5,201,668651,179
Events in quadrant C3,208,826606,345
Events in quadrant D9,711,248385,440

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0214491
B0198731
C0143371
D0334191

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65583535.382739%
B65594576.967526%
C6559580.884281%
D6559236135.996341%

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 7508 6559 190 190 2.53% 2.90%
B 7509 6560 284 284 3.78% 4.33%
C 7509 6560 39 39 0.52% 0.59%
D 7508 6559 1869 1869 24.89% 28.50%

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 12 3 1690522 9664.3 706 688 174.9
A 12 250 253045 1443.25 706 688 174.9
A 12 194 199865 1139.11 706 688 174.9
B 10 254 1570892 10429.62 701 677 150.6
B 0 213 200285 1325.83 701 677 150.6
B 4 206 125293 827.72 701 677 150.6
C 13 3 198224 1026.93 695 691 192.4
C 10 19 67707 348.4 695 691 192.4
C 12 252 61536 316.32 695 691 192.4
D 8 176 6582470 43326.55 545 526 151.9
D 13 170 234948 1543.11 545 526 151.9
D 12 218 232430 1526.54 545 526 151.9

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