ASTROSAT CZTI

Data Quality Report

Orbit 20171019_A04_180T01_9000001622_level2

Creation date: 2025-11-17T20:43:19.358556
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/AS1A04_180T01_9000001622cztM0_level2.fits modeM0/AS1A04_180T01_9000001622cztM0_level2_quad_clean.evt
Size (bytes)346,181,760323,976,960
Size330.1 MB 309.0 MB
Events in quadrant A2,043,2941,815,644
Events in quadrant B2,064,4701,937,988
Events in quadrant C2,118,8241,898,985
Events in quadrant D1,782,2041,686,073

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220790
B0951340
C0750660
D0966550

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0660
B0660
C0660
D0660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07340
B07320
C07280
D07360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A35851388210.828150%
B3598420695.749778%
C360724491.244733%
D3603717874.958792%

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 44165 36137 0 0 0.00% 0.00%
B 44165 36276 0 0 0.00% 0.00%
C 44165 36385 0 0 0.00% 0.00%
D 44165 36344 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 1907 10.61 532 499 132.7
A 7 110 1671 8.83 532 499 132.7
A 9 19 1501 7.55 532 499 132.7
B 2 9 1711 11.01 544 519 108.3
B 3 17 1374 7.9 544 519 108.3
B 5 128 1344 7.62 544 519 108.3
C 1 80 1616 7.4 560 519 148.1
C 1 81 1577 7.14 560 519 148.1
C 12 241 1445 6.25 560 519 148.1
D 3 14 1359 6.57 508 462 136.5
D 6 231 1340 6.43 508 462 136.5
D 3 31 1311 6.22 508 462 136.5

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