ASTROSAT CZTI

Data Quality Report

Orbit 20170314_A02_158T01_9000001080_level2

Creation date: 2025-11-10T02:19:06.201164
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/AS1A02_158T01_9000001080cztM0_level2.fits modeM0/AS1A02_158T01_9000001080cztM0_level2_quad_clean.evt
Size (bytes)307,126,080340,384,320
Size292.9 MB 324.6 MB
Events in quadrant A1,842,7722,119,519
Events in quadrant B1,799,1722,140,586
Events in quadrant C1,835,4822,038,901
Events in quadrant D1,506,9401,694,259

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06860
B06860
C06860
D06860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0694410
B0709440
C0767360
D0915450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A337114231.254783%
B337114681.388271%
C337114131.225119%
D3371128918.575836%

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 38536 33711 0 0 0.00% 0.00%
B 38536 33710 0 0 0.00% 0.00%
C 38536 33711 0 0 0.00% 0.00%
D 38536 33690 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 1824 11.08 479 446 124.3
A 7 110 1578 9.1 479 446 124.3
A 0 30 1439 7.99 479 446 124.3
B 2 9 1561 11.48 473 448 97.0
B 14 254 1306 8.85 473 448 97.0
B 5 225 1230 8.07 473 448 97.0
C 1 80 1390 7.37 483 449 127.7
C 12 241 1317 6.8 483 449 127.7
C 1 81 1312 6.76 483 449 127.7
D 7 5 1106 6.23 429 390 115.0
D 6 231 1102 6.19 429 390 115.0
D 11 82 1091 6.09 429 390 115.0

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