ASTROSAT CZTI

Data Quality Report

Orbit 55728

Creation date: 2026-01-16T16:21:24.941543
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_55728cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55728cztM0_level2_quad_clean.evt
Size (bytes)1,025,196,48077,463,360
Size977.7 MB 73.9 MB
Events in quadrant A7,948,838526,303
Events in quadrant B4,525,169709,045
Events in quadrant C13,060,754231,122
Events in quadrant D11,851,170371,422

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0285810
B0187940
C0438807
D0402500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7284174823.997803%
B72842813.857770%
C7283485366.634629%
D7283307342.194151%

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 7284 7283 1227 1227 16.85% 16.85%
B 7284 7284 213 213 2.92% 2.92%
C 7283 7282 3535 3535 48.54% 48.54%
D 7282 7282 2970 2970 40.79% 40.79%

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 4361964 26604.61 658 642 163.9
A 4 249 513705 3129.75 658 642 163.9
A 8 192 185034 1124.81 658 642 163.9
B 4 206 1412281 8768.49 747 720 161.0
B 5 172 63593 390.56 747 720 161.0
B 10 247 27230 164.68 747 720 161.0
C 9 38 6432643 50475.63 466 463 127.4
C 15 199 4429486 34756.14 466 463 127.4
C 14 96 163690 1280.9 466 463 127.4
D 11 129 8796302 52418.79 591 566 167.8
D 10 181 471353 2805.69 591 566 167.8
D 7 129 69626 411.57 591 566 167.8

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