ASTROSAT CZTI

Data Quality Report

Orbit 20180912_G08_046T09_9000002358_level2

Creation date: 2025-11-24T15:40:43.372392
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_046T09_9000002358cztM0_level2.fits modeM0/AS1G08_046T09_9000002358cztM0_level2_quad_clean.evt
Size (bytes)328,996,800356,437,440
Size313.8 MB 339.9 MB
Events in quadrant A1,979,2362,176,366
Events in quadrant B1,894,8762,169,257
Events in quadrant C1,929,0562,061,236
Events in quadrant D1,701,1761,928,755

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0764040
B0781050
C0732560
D0753800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0430
C0430
D0430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07260
B07260
C07260
D07260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A358067572.114171%
B358065911.650561%
C358064551.270737%
D358064261.189745%

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 39981 35798 0 0 0.00% 0.00%
B 39981 35800 0 0 0.00% 0.00%
C 39981 35801 0 0 0.00% 0.00%
D 39981 35796 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 1895 10.87 515 482 130.0
A 7 110 1584 8.47 515 482 130.0
A 0 30 1466 7.57 515 482 130.0
B 2 9 1501 10.05 502 478 101.8
B 14 254 1292 8.0 502 478 101.8
B 3 17 1268 7.76 502 478 101.8
C 12 241 1346 6.58 510 473 132.7
C 3 126 1291 6.17 510 473 132.7
C 2 191 1288 6.14 510 473 132.7
D 6 231 1266 6.26 486 440 132.0
D 3 14 1254 6.16 486 440 132.0
D 6 67 1215 5.87 486 440 132.0

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