ASTROSAT CZTI

Data Quality Report

Orbit 20181129_C04_004T01_9000002542_level2

Creation date: 2025-11-26T02:23:26.692503
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/AS1C04_004T01_9000002542cztM0_level2.fits modeM0/AS1C04_004T01_9000002542cztM0_level2_quad_clean.evt
Size (bytes)318,893,760308,537,280
Size304.1 MB 294.2 MB
Events in quadrant A1,939,1281,843,455
Events in quadrant B1,889,9721,866,983
Events in quadrant C1,855,7521,720,450
Events in quadrant D1,650,9561,591,929

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06900
B06900
C06900
D06900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0698920
B0701100
C01070030
D0848800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A337785381.592753%
B337786441.906566%
C3377822036.521997%
D3377810973.247676%

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 37338 33776 0 0 0.00% 0.00%
B 37338 33775 0 0 0.00% 0.00%
C 37338 33776 0 0 0.00% 0.00%
D 37338 33777 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 1785 10.54 503 472 124.5
A 7 110 1576 8.86 503 472 124.5
A 9 19 1478 8.08 503 472 124.5
B 2 9 1567 10.88 498 473 100.5
B 2 8 1247 7.7 498 473 100.5
B 5 225 1239 7.62 498 473 100.5
C 1 81 1439 7.67 489 456 128.1
C 1 80 1432 7.62 489 456 128.1
C 12 241 1354 7.01 489 456 128.1
D 3 14 1226 6.25 471 428 127.6
D 6 231 1188 5.95 471 428 127.6
D 10 189 1168 5.8 471 428 127.6

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