ASTROSAT CZTI

Data Quality Report

Orbit 51495

Creation date: 2025-04-05T22:16:31.136567
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_51495cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51495cztM0_level2_quad_clean.evt
Size (bytes)770,345,28087,730,560
Size734.7 MB 83.7 MB
Events in quadrant A5,359,842602,250
Events in quadrant B5,850,475659,955
Events in quadrant C4,345,983604,960
Events in quadrant D12,456,068334,926

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0203040
B0217650
C0173350
D0415190

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65105738.801843%
B65105929.093702%
C65101852.841782%
D6510312648.018433%

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 7600 6510 382 382 5.03% 5.87%
B 7600 6510 324 324 4.26% 4.98%
C 7600 6510 105 105 1.38% 1.61%
D 7599 6509 3224 3224 42.43% 49.53%

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 12 250 975002 5584.79 714 695 174.5
A 12 2 451417 2583.57 714 695 174.5
A 8 249 256845 1468.27 714 695 174.5
B 4 81 1914179 12665.36 708 685 151.1
B 8 234 241097 1591.28 708 685 151.1
B 8 128 216007 1425.21 708 685 151.1
C 9 38 707076 3596.66 704 700 196.4
C 15 215 200178 1015.68 704 700 196.4
C 13 3 158296 802.43 704 700 196.4
D 8 176 6342419 40755.06 556 536 155.6
D 11 176 3193483 20518.94 556 536 155.6
D 3 12 329205 2112.14 556 536 155.6

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