ASTROSAT CZTI

Data Quality Report

Orbit 20170123_A02_175T01_9000000976_level2

Creation date: 2017-09-22T22:29:07.896193
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_175T01_9000000976cztM0_level2.evt modeM0/AS1A02_175T01_9000000976cztM0_level2_quad_clean.evt
Size (bytes)1,979,170,560293,224,320
Size1.8 GB 279.6 MB
Events in quadrant A13,270,1371,795,644
Events in quadrant B12,510,8791,865,013
Events in quadrant C13,859,7941,817,018
Events in quadrant D18,613,1151,683,507

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05120
B05120
C05120
D05120

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0630
B0630
C0630
D0640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0554360
B0529730
C0575010
D0714730

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A249903011.204482%
B249901850.740296%
C249904921.968788%
D2499014075.630252%

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 30109 24991 142 142 0.47% 0.57%
B 30109 24990 12 12 0.04% 0.05%
C 30109 24992 321 321 1.07% 1.28%
D 30109 24991 1134 1134 3.77% 4.54%

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 14 238 1145878 1888.15 3007 2948 605.3
A 8 15 440049 722.1 3007 2948 605.3
A 3 1 50203 78.07 3007 2948 605.3
B 0 214 194589 332.77 3064 2993 575.8
B 0 219 187741 320.87 3064 2993 575.8
B 4 81 131022 222.36 3064 2993 575.8
C 4 254 1707980 2507.39 2938 2956 680.0
C 9 68 538742 787.92 2938 2956 680.0
C 7 247 106230 151.87 2938 2956 680.0
D 2 216 3291870 4702.47 2871 2784 699.4
D 14 34 1517387 2165.46 2871 2784 699.4
D 2 14 1369711 1954.32 2871 2784 699.4

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