ASTROSAT CZTI

Data Quality Report

Orbit 51478

Creation date: 2025-04-04T18:27:25.550136
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/AS1A13_090T01_9000006458_51478cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51478cztM0_level2_quad_clean.evt
Size (bytes)633,168,00094,415,040
Size603.8 MB 90.0 MB
Events in quadrant A5,327,810626,357
Events in quadrant B3,939,506689,460
Events in quadrant C3,867,221618,991
Events in quadrant D9,773,872447,370

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205722
B0164402
C0164102
D0337462

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68313595.255453%
B68322203.220141%
C68322103.073770%
D6832185327.122365%

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 7781 6832 188 188 2.42% 2.75%
B 7782 6833 98 98 1.26% 1.43%
C 7782 6832 115 115 1.48% 1.68%
D 7782 6832 1787 1787 22.96% 26.16%

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 12 3 1386579 7724.86 738 720 179.4
A 8 43 250691 1393.35 738 720 179.4
A 12 194 165111 916.32 738 720 179.4
B 4 81 218130 1394.48 730 706 155.9
B 8 234 193608 1237.2 730 706 155.9
B 7 252 150037 957.76 730 706 155.9
C 13 3 278742 1370.8 724 717 202.8
C 15 215 275916 1356.86 724 717 202.8
C 0 177 130214 638.48 724 717 202.8
D 8 176 6234776 34375.94 643 620 181.4
D 5 32 278669 1533.2 643 620 181.4
D 11 176 212428 1167.94 643 620 181.4

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