43.1942° N, 71.1514° W
It occured about 11:15pm EST.
No Iridium flares were indicated at that site anywhere near 11:15 PM that time. Satellites in low earth orbit are generally best viewed around twilight, 11:15 PM is rather late. I wonder if you saw a geosynchronous or GPS satellite.
If you would like to see an iridium flare, just to compare it to your experience, there is very bright Iridium flare predicted for Tuesday
Time Mar 26, 20:23:09 (8:23:09 PM)
Brightness -8.3
Altitude 57°
Azimuth 120° (ESE)
Satellite Iridium 42
Distance to flare centre 2 km (E)
Brightness at flare centre -8.4
The timing may be off by a few seconds. They are generally very easy to spot. You should see dozens of satellites in a ten minute span around that time. This one should come from the North North East, passing through the bowl of the little dipper around 8:20:30 and the bowl of the Big Dipper around 8:22:40 a little more than a minute before flaring in Leo at 20:23:09
Clear skies and good views!