ASTROSAT CZTI

Data Quality Report

Orbit 52466

Creation date: 2025-06-26T11:32:42.085319
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_037T01_9000006476_52466cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52466cztM0_level2_quad_clean.evt
Size (bytes)852,802,56076,219,200
Size813.3 MB 72.7 MB
Events in quadrant A3,029,282641,439
Events in quadrant B4,835,974668,673
Events in quadrant C6,501,699544,866
Events in quadrant D16,699,5981,670

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0138472
B0187932
C0238742
D0541097

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6465210.324826%
B64653265.042537%
C646581312.575406%
D6464645299.814356%

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 7575 6466 8 8 0.11% 0.12%
B 7575 6466 270 270 3.56% 4.18%
C 7575 6465 595 595 7.85% 9.20%
D 7574 6465 6029 6029 79.60% 93.26%

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 3 14 68923 395.07 696 679 172.7
A 4 3 45750 260.92 696 679 172.7
A 11 3 38717 220.2 696 679 172.7
B 10 254 1479210 10026.14 689 664 147.5
B 4 81 162231 1095.6 689 664 147.5
B 4 171 130472 880.24 689 664 147.5
C 12 254 1600926 9064.92 640 635 176.5
C 15 224 1411979 7994.62 640 635 176.5
C 13 3 271374 1533.61 640 635 176.5
D 15 93 15479955 315478.33 168 160 49.1
D 15 78 101916 2073.79 168 160 49.1
D 6 42 62282 1266.05 168 160 49.1

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