ASTROSAT CZTI

Data Quality Report

Orbit 55458

Creation date: 2025-12-28T16:18:58.581405
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/AS1A14_099T01_9000006536_55458cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55458cztM0_level2_quad_clean.evt
Size (bytes)462,841,92094,461,120
Size441.4 MB 90.1 MB
Events in quadrant A3,218,917631,523
Events in quadrant B3,028,424683,760
Events in quadrant C3,259,064599,643
Events in quadrant D7,111,746483,869

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181
B0180
C0181
D0192

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144142
B0139482
C0147392
D0257592

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66201121.691843%
B6620871.314199%
C6620901.359517%
D6620111916.903323%

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 7651 6621 60 60 0.78% 0.91%
B 7651 6621 15 15 0.20% 0.23%
C 7651 6621 49 49 0.64% 0.74%
D 7651 6621 1061 1061 13.87% 16.02%

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 3 78 202221 1157.22 711 692 174.1
A 0 8 186329 1065.96 711 692 174.1
A 4 159 19153 106.01 711 692 174.1
B 0 171 82647 540.3 703 677 151.7
B 2 249 43115 279.73 703 677 151.7
B 5 236 21223 135.43 703 677 151.7
C 13 3 250304 1335.99 683 676 186.8
C 1 16 180062 960.06 683 676 186.8
C 12 252 83404 442.75 683 676 186.8
D 2 62 3470121 19393.2 638 607 178.9
D 8 160 460854 2572.6 638 607 178.9
D 2 31 241628 1347.21 638 607 178.9

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