ASTROSAT CZTI

Data Quality Report

Orbit 55809

Creation date: 2026-01-21T08:00:24.591396
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_127T10_9000006542_55809cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55809cztM0_level2_quad_clean.evt
Size (bytes)471,430,08097,099,200
Size449.6 MB 92.6 MB
Events in quadrant A5,313,101618,087
Events in quadrant B3,092,146688,798
Events in quadrant C2,853,329619,790
Events in quadrant D5,670,826545,185

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0203582
B0144092
C0140302
D0216222

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67143134.661901%
B6714630.938338%
C6714400.595770%
D67145177.700328%

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 7864 6715 281 281 3.57% 4.18%
B 7864 6715 9 9 0.11% 0.13%
C 7864 6715 14 14 0.18% 0.21%
D 7864 6715 438 438 5.57% 6.52%

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 15 32 1668550 9821.94 684 666 169.8
A 12 115 276026 1621.56 684 666 169.8
A 8 192 221271 1299.11 684 666 169.8
B 0 213 180303 1214.04 689 666 148.0
B 7 252 98178 659.02 689 666 148.0
B 10 247 33093 219.15 689 666 148.0
C 13 3 93499 489.55 681 675 189.6
C 15 200 39903 206.89 681 675 189.6
C 14 254 17084 86.54 681 675 189.6
D 11 129 1992577 10838.96 651 623 183.8
D 7 70 780276 4242.38 651 623 183.8
D 3 12 152632 827.14 651 623 183.8

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