ASTROSAT CZTI

Data Quality Report

Orbit 20171014_G08_075T01_9000001616_level2

Creation date: 2025-11-17T19:23:57.117021
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/AS1G08_075T01_9000001616cztM0_level2.fits modeM0/AS1G08_075T01_9000001616cztM0_level2_quad_clean.evt
Size (bytes)373,659,840341,199,360
Size356.3 MB 325.4 MB
Events in quadrant A2,305,9462,027,854
Events in quadrant B2,198,6001,977,843
Events in quadrant C2,263,8281,946,681
Events in quadrant D1,913,0421,746,517

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07840
B07840
C07840
D07840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0890
B0890
C0890
D0890

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0902350
B01015970
C0790330
D01019430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A383506141.601043%
B3835021065.491525%
C383503250.847458%
D3835016844.391134%

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 47260 38346 0 0 0.00% 0.00%
B 47260 38347 0 0 0.00% 0.00%
C 47260 38350 0 0 0.00% 0.00%
D 47260 38317 0 0 0.00% 0.00%

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 0 29 2216 11.01 599 564 150.0
A 7 110 1846 8.55 599 564 150.0
A 9 19 1697 7.55 599 564 150.0
B 2 9 1906 11.59 580 554 116.7
B 5 128 1474 7.89 580 554 116.7
B 2 8 1464 7.8 580 554 116.7
C 1 80 1730 7.57 597 558 154.9
C 1 81 1675 7.21 597 558 154.9
C 12 241 1521 6.22 597 558 154.9
D 6 231 1395 6.12 545 495 147.2
D 3 31 1359 5.87 545 495 147.2
D 6 67 1349 5.8 545 495 147.2

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