ASTROSAT CZTI

Data Quality Report

Orbit 55738

Creation date: 2026-01-16T17:22:59.043966
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_099T04_9000006540_55738cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55738cztM0_level2_quad_clean.evt
Size (bytes)665,700,48088,672,320
Size634.9 MB 84.6 MB
Events in quadrant A10,218,249422,175
Events in quadrant B3,469,634683,270
Events in quadrant C4,773,512618,414
Events in quadrant D5,671,975503,340

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0349542
B0152332
C0187412
D0217412

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6559254938.862631%
B65591422.164964%
C65591281.951517%
D655995214.514408%

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 7649 6561 2029 2029 26.53% 30.93%
B 7649 6561 57 57 0.75% 0.87%
C 7649 6561 73 73 0.95% 1.11%
D 7649 6561 768 768 10.04% 11.71%

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 7195753 49668.32 589 575 144.9
A 12 115 262640 1809.03 589 575 144.9
A 8 192 138066 949.1 589 575 144.9
B 5 172 437557 2919.66 701 677 149.6
B 4 206 216873 1444.83 701 677 149.6
B 10 247 18164 116.87 701 677 149.6
C 9 38 1356305 7129.32 688 681 190.1
C 13 3 239374 1255.3 688 681 190.1
C 14 96 222043 1164.16 688 681 190.1
D 11 129 3112477 17475.24 629 600 178.1
D 5 173 39686 219.49 629 600 178.1
D 2 31 33032 182.13 629 600 178.1

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