ASTROSAT CZTI

Data Quality Report

Orbit 51855

Creation date: 2025-04-30T10:04:19.929685
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/AS1C09_011T05_9000006466_51855cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51855cztM0_level2_quad_clean.evt
Size (bytes)713,926,08081,408,960
Size680.9 MB 77.6 MB
Events in quadrant A7,578,447511,292
Events in quadrant B4,511,277634,562
Events in quadrant C3,587,174586,794
Events in quadrant D10,250,225282,471

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0270191
B0178651
C0153292
D0349271

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6447118318.349620%
B64482914.513027%
C64471221.892353%
D6447337652.365441%

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 7416 6447 1151 1151 15.52% 17.85%
B 7418 6448 251 251 3.38% 3.89%
C 7417 6447 78 78 1.05% 1.21%
D 7417 6447 2737 2737 36.90% 42.45%

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 1947994 12394.51 634 618 157.1
A 0 228 994548 6326.09 634 618 157.1
A 12 3 872744 5550.84 634 618 157.1
B 1 255 509469 3636.24 662 639 139.9
B 10 44 387958 2767.89 662 639 139.9
B 0 171 152023 1081.83 662 639 139.9
C 15 230 335727 1823.27 663 659 183.8
C 15 192 154025 834.54 663 659 183.8
C 13 3 131902 714.16 663 659 183.8
D 11 129 7261755 59046.66 436 419 123.0
D 7 96 734333 5967.93 436 419 123.0
D 6 42 193050 1566.41 436 419 123.0

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